From quasars to geodesy: how astronomy can enable a new era in ultra-precise geodetic measurements

Search results

  • 2025

    A multifrequency study of sub-parsec jets with the Event Horizon Telescope

    Savolainen, T., Ramakrishnan, V., Wiik, K. & Event Horizon Telescope Collaboration, 1 Mar 2025, In: Astronomy and Astrophysics. 695, 21 p., A233.

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  • 2024

    First Sagittarius A∗ Event Horizon Telescope Results. VII. Polarization of the Ring

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L. & Bower, G. C. & 31 others, Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Kim, D. J., Li, Z., Ramakrishnan, V., Savolainen, T., Wagner, J., Washington, J. E., Wiik, K. & Event Horizon Telescope Collaboration, 1 Apr 2024, In: Astrophysical Journal Letters. 964, 2, p. 1-32 32 p., L25.

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    33 Citations (Scopus)
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  • First Very Long Baseline Interferometry Detections at 870 μm

    Raymond, A. W., Doeleman, S. S., Asada, K., Blackburn, L., Bower, G. C., Bremer, M., Broguiere, D., Chen, M. T., Crew, G. B., Dornbusch, S., Fish, V. L., García, R., Gentaz, O., Goddi, C., Han, C. C., Hecht, M. H., Huang, Y. D., Janssen, M., Keating, G. K. & Koay, J. Y. & 258 others, Krichbaum, T. P., Lo, W. P., Matsushita, S., Matthews, L. D., Moran, J. M., Norton, T. J., Patel, N., Pesce, D. W., Ramakrishnan, V., Rottmann, H., Roy, A. L., Sánchez, S., Tilanus, R. P. J., Titus, M., Torne, P., Wagner, J., Weintroub, J., Wielgus, M., Young, A., Akiyama, K., Albentosa-Ruíz, E., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Balokovic, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Bouman, K. L., Boyce, H., Brissenden, R., Britzen, S., Broderick, A. E., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Dihingia, I. K., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fomalont, E., Fontana, A. L., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., Georgiev, B., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. W. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Jeter, B., Jiang, W., Jiménez-Rosales, A., Johnson, M. D., Jorstad, S., Jones, A. C., Joshi, A. V., Jung, T., Karuppusamy, R., Kawashima, T., Kettenis, M., Kim, D. J., Kim, J. Y., Kim, J., Kim, J., Kino, M., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kubo, D., Kuo, C. Y., La Bella, N., Lee, S. S., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mahieu, S., Maier, D., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Medeiros, L., Menten, K. M., Mizuno, I., Mizuno, Y., Montgomery, J., Moriyama, K., Moscibrodzka, M., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Myserlis, I., Nagai, H., Nagar, N. M., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. N., Neilsen, J., Ni, C., Nowak, M. A., Oh, J., Okino, H., Olivares Sánchez, H. R., Oyama, T., Özel, F., Palumbo, D. C. M., Paraschos, G. F., Park, J., Parsons, H., Pen, U. L., Piétu, V., PopStefanija, A., Porth, O., Prather, B., Principe, G., Psaltis, D., Pu, H. Y., Raffin, P. A., Rao, R., Rawlings, M. G., Ricarte, A., Ripperda, B., Roelofs, F., Romero-Cañizales, C., Ros, E., Roshanineshat, A., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. F., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Sosapanta Salas, L. D., Souccar, K., Stanway, J. S., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Toma, K., Toscano, T., Traianou, E., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zensus, J. A., Zhang, S., Zhao, G. Y. & Zhao, S. S., 1 Sept 2024, In: Astronomical Journal. 168, 3, 130.

    Research output: Contribution to journalArticleScientificpeer-review

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  • Ordered magnetic fields around the 3C 84 central black hole

    Paraschos, G. F., Kim, J. Y., Wielgus, M., Röder, J., Krichbaum, T. P., Ros, E., Agudo, I., Myserlis, I., Moscibrodzka, M., Traianou, E., Zensus, J. A., Blackburn, L., Chan, C. K., Issaoun, S., Janssen, M., Johnson, M. D., Fish, V. L., Akiyama, K., Alberdi, A. & Alef, W. & 263 others, Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Doeleman, S. S., Dougal, S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fomalont, E., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Haworth, K., Hecht, M. H., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., James, D. J., Jannuzi, B. T., Jeter, B., Jaing, W., Jiménez-Rosales, A., Jorstad, S., Joshi, A. V., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. J., Kim, J., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Kuo, C. Y., La Bella, N., Lauer, T. R., Lee, D., Lee, S. S., Leung, P. K., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Michalik, D., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Nadolski, A., Nagai, H., Nagar, N. M., Nakamura, M., Narayanan, G., Natarajan, I., Nathanail, A., Navarro Fuentes, S., Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Oh, J., Okino, H., Olivares, H., Ortiz-León, G. N., Oyama, T., ÖZel, F., Palumbo, D. C. M., Park, J., Parsons, H., Patel, N., Pen, U. L., Piétu, V., Plambeck, R., Popstefanija, A., Porth, O., Pötzl, F. M., Prather, B., Preciado-López, J. A., Psaltis, D., Pu, H. Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Roelofs, F., Rogers, A., Romero-Cañizales, C., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K., Shao, L., Shen, Z., Small, D., Sohn, B. W., Soohoo, J., Sosapanta Salas, L. D., Souccar, K., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Torne, P., Toscano, T., Trent, T., Trippe, S., Turk, M., Van Bemmel, I., Van Langevelde, H. J., Van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Young, K., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zhang, S., Zhao, G. Y. & Zhao, S. S., 1 Feb 2024, In: Astronomy and Astrophysics. 682, 15 p., L3.

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  • The persistent shadow of the supermassive black hole of M 87: I. Observations, calibration, imaging, and analysis*

    Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Bandyopadhyay, B., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L. & Bower, G. C. & 31 others, Boyce, H., Bremer, M., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamante, S., Carlstrom, J. E., Chael, A., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 18 Jan 2024, In: Astronomy and Astrophysics. 681, 63 p., A79.

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  • The putative center in NGC 1052

    Ramakrishnan, V., Savolainen, T., Wiik, K. & Event Horizon Telescope Collaboration, 1 Dec 2024, In: Astronomy and Astrophysics. 692, A205.

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  • Unprecedented extreme high-frequency radio variability in early-stage active galactic nuclei

    Järvelä, E., Savolainen, T., Berton, M., Lähteenmäki, A., Kiehlmann, S., Hovatta, T., Varglund, I., Readhead, A. C. S., Tornikoski, M., Max-Moerbeck, W., Reeves, R. A. & Suutarinen, S., 1 Aug 2024, In: Monthly Notices of the Royal Astronomical Society. 532, 3, p. 3069-3101 33 p.

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  • 2023

    Astrometric Positions of Gravitational Lensed System 1422+231

    Xu, M., Savolainen, T., Liu, N., de Witt, A., Lunz, S., Heinkelmann, R. & Schuh, H., 1 Jan 2023, International VLBI Service for Geodesy and Astrometry 2022 General Meeting Proceedings. Armstrong, K. L., Behrend, D. & Baver, K. D. (eds.). NASA - National Aeronautics and Space Administration, p. 306-309 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional

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  • Baseline Vector Repeatability at the Sub-Millimeter Level Enabled by Radio Interferometer Phase Delays of Intra-Site Baselines

    Xu, M. H., Savolainen, T., Bolotin, S., Bernhart, S., Plötz, C., Haas, R., Varenius, E., Wang, G., McCallum, J., Heinkelmann, R., Lunz, S., Schuh, H., Zubko, N. & Kareinen, N., Mar 2023, In: Journal of Geophysical Research: Solid Earth. 128, 3, e2022JB025198.

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  • Comparison of Polarized Radiative Transfer Codes Used by the EHT Collaboration

    Ramakrishnan, V., Savolainen, T. & Event Horizon Telescope Collaboration, 1 Jun 2023, In: Astrophysical Journal. 950, 1, 35.

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  • Enhancing the alignment of the optically bright Gaia reference frame with respect to the International Celestial Reference System

    Lunz, S., Anderson, J. M., Xu, M. H., Titov, O., Heinkelmann, R., Johnson, M. C. & Schuh, H., 1 Aug 2023, In: Astronomy and Astrophysics. 676, A11.

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  • Filamentary structures as the origin of blazar jet radio variability

    Fuentes, A., Gómez, J. L., Martí, J. M., Perucho, M., Zhao, G. Y., Lico, R., Lobanov, A. P., Bruni, G., Kovalev, Y. Y., Chael, A., Akiyama, K., Bouman, K. L., Sun, H., Cho, I., Traianou, E., Toscano, T., Dahale, R., Foschi, M., Gurvits, L. I. & Jorstad, S. & 5 others, Kim, J. Y., Marscher, A. P., Mizuno, Y., Ros, E. & Savolainen, T., Nov 2023, In: Nature Astronomy. 7, 11, p. 1359-1367 9 p.

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  • MOJAVE – XX. Persistent linear polarization structure in parsec-scale AGN jets

    Pushkarev, A. B., Aller, H. D., Aller, M. F., Homan, D. C., Kovalev, Y. Y., Lister, M. L., Pashchenko, I. N., Savolainen, T. & Zobnina, D. I., 1 Apr 2023, In: Monthly Notices of the Royal Astronomical Society. 520, 4, p. 6053-6069 17 p.

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  • Polarimetric Geometric Modeling for mm-VLBI Observations of Black Holes

    Roelofs, F., Johnson, M. D., Chael, A., Janssen, M., Wielgus, M., Broderick, A. E., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Bauböck, M. & Benson, B. A. & 263 others, Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chan, C. K., Chang, D. O., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Conroy, N. S., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Dahale, R., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Dhruv, V., Doeleman, S. S., Dougal, S., Dzib, S. A., Eatough, R. P., Emami, R., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Foschi, M., Fraga-Encinas, R., Freeman, W. T., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Gammie, C. F., García, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gómez-Ruiz, A. I., Gómez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Haworth, K., Hecht, M. H., Hesper, R., Heumann, D., Ho, L. C., Ho, P., Honma, M., Huang, C. W. L., Huang, L., Hughes, D. H., Ikeda, S., Impellizzeri, C. M. V., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Jeter, B., Jiang, W., Jiménez-Rosales, A., Jorstad, S., Joshi, A. V., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D. J., Kim, J. Y., Kim, J., Kim, J., Kino, M., Koay, J. Y., Kocherlakota, P., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, J. A., Kramer, M., Krichbaum, T. P., Kuo, C. Y., La Bella, N., Lauer, T. R., Lee, D., Lee, S. S., Leung, P. K., Levis, A., Li, Z., Lico, R., Lindahl, G., Lindqvist, M., Lisakov, M., Liu, J., Liu, K., Liuzzo, E., Lo, W. P., Lobanov, A. P., Loinard, L., Lonsdale, C. J., Lowitz, A. E., Lu, R. S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Martí-Vidal, I., Matsushita, S., Matthews, L. D., Medeiros, L., Menten, K. M., Michalik, D., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., Mulaudzi, W., Müller, C., Müller, H., Mus, A., Musoke, G., Myserlis, I., Nadolski, A., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Fuentes, S. N., Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Oh, J., Okino, H., Olivares, H., Ortiz-León, G. N., Oyama, T., Özel, F., Palumbo, D. C. M., Paraschos, G. F., Park, J., Parsons, H., Patel, N., Pen, U. L., Pesce, D. W., Piétu, V., Plambeck, R., PopStefanija, A., Porth, O., Pötzl, F. M., Prather, B., Preciado-López, J. A., Psaltis, D., Pu, H. Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ricarte, A., Ripperda, B., Rogers, A., Romero-Cañizales, C., Ros, E., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruiz, I., Ruszczyk, C., Rygl, K. L. J., Sánchez, S., Sánchez-Argüelles, D., Sánchez-Portal, M., Sasada, M., Satapathy, K., Savolainen, T., Schloerb, F. P., Schonfeld, J., Schuster, K. F., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Sosapanta Salas, L. D., Souccar, K., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Torne, P., Toscano, T., Traianou, E., Trent, T., Trippe, S., Turk, M., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Vos, J., Wagner, J., Ward-Thompson, D., Wardle, J., Washington, J. E., Weintroub, J., Wharton, R., Wiik, K., Witzel, G., Wondrak, M. F., Wong, G. N., Wu, Q., Yadlapalli, N., Yamaguchi, P., Yfantis, A., Yoon, D., Young, A., Young, K., Younsi, Z., Yu, W., Yuan, F., Yuan, Y. F., Zensus, J. A., Zhang, S., Zhao, G. Y. & Zhao, S. S., 1 Nov 2023, In: Astrophysical Journal Letters. 957, 2, p. L21 L21.

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  • RadioAstron discovery of a mini-cocoon around the restarted parsec-scale jet in 3C 84

    Savolainen, T., Giovannini, G., Kovalev, Y. Y., Perucho, M., Anderson, J. M., Bruni, G., Edwards, P. G., Fuentes, A., Giroletti, M., Gomez, J. L., Hada, K., Lee, S. S., Lisakov, M. M., Lobanov, A. P., Lopez-Miralles, J., Orienti, M., Petrov, L., Plavin, A. V., Sohn, B. W. & Sokolovsky, K. V. & 2 others, Voitsik, P. A. & Zensus, J. A., 1 Aug 2023, In: Astronomy and Astrophysics. 676, A114.

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  • RadioAstron Space VLBI Imaging of the Jet in M87. I. Detection of High Brightness Temperature at 22 GHz

    Kim, J. Y., Savolainen, T., Voitsik, P., Kravchenko, E. V., Lisakov, M. M., Kovalev, Y. Y., Müller, H., Lobanov, A. P., Sokolovsky, K. V., Bruni, G., Edwards, P. G., Reynolds, C., Bach, U., Gurvits, L. I., Krichbaum, T. P., Hada, K., Giroletti, M., Orienti, M., Anderson, J. M. & Lee, S. S. & 2 others, Sohn, B. W. & Zensus, J. A., 1 Jul 2023, In: Astrophysical Journal. 952, 1, 34.

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  • The Event Horizon Telescope Image of the Quasar NRAO 530

    Jorstad, S., Wielgus, M., Lico, R., Issaoun, S., Broderick, A. E., Pesce, D. W., Liu, J., Zhao, G. Y., Krichbaum, T. P., Blackburn, L., Chan, C. K., Janssen, M., Ramakrishnan, V., Akiyama, K., Alberdi, A., Algaba, J. C., Bouman, K. L., Cho, I., Fuentes, A. & Gómez, J. L. & 2 others, Gurwell, M. & Event Horizon Telescope Collaboration, 1 Feb 2023, In: Astrophysical Journal. 943, 2, 19 p., 170.

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  • Time variability of the core-shift effect in the blazar 3C 454.3

    Chamani, W., Savolainen, T., Ros, E., Kovalev, Y. Y., Wiik, K., Lähteenmäki, A., Tornikoski, M. & Tammi, J., 1 Apr 2023, In: Astronomy and Astrophysics. 672, A130.

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  • 2022

    A Universal Power-law Prescription for Variability from Synthetic Images of Black Hole Accretion Flows

    Georgiev, B., Pesce, D. W., Broderick, A. E., Wong, G. N., Dhruv, V., Wielgus, M., Gammie, C. F., Chan, C. K., Chatterjee, K., Emami, R., Mizuno, Y., Gold, R., Fromm, C. M., Ricarte, A., Yoon, D., Joshi, A. V., Prather, B., Cruz-Osorio, A., Johnson, M. D. & Porth, O. & 31 others, Olivares, H., Younsi, Z., Rezzolla, L., Vos, J., Qiu, R., Nathanail, A., Narayan, R., Chael, A., Anantua, R., Moscibrodzka, M., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Kim, D. J., Ramakrishnan, V., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 1 May 2022, In: Astrophysical Journal Letters. 930, 2, p. 1-32 32 p., L20.

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  • Characterizing and Mitigating Intraday Variability: Reconstructing Source Structure in Accreting Black Holes with mm-VLBI

    Broderick, A. E., Gold, R., Georgiev, B., Pesce, D. W., Tiede, P., Ni, C., Moriyama, K., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J. & Bauböck, M. & 31 others, Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broguiere, D., Bronzwaer, T., Bustamante, S., Byun, D. Y., Carlstrom, J. E., Ceccobello, C., Chael, A., Chan, C. K., Chatterjee, K., Chatterjee, S., Chen, M. T., Chen, Y., Cheng, X., Cho, I., Christian, P., Kim, D. J., Ramakrishnan, V., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 1 May 2022, In: Astrophysical Journal Letters. 930, 2, p. 1-30 30 p., L21.

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  • Impact of the image alignment over frequency for the VLBI Global Observing System

    Xu, M. H., Savolainen, T., Anderson, J. M., Kareinen, N., Zubko, N., Lunz, S. & Schuh, H., 18 Jul 2022, In: Astronomy & Astrophysics. 663, 10 p., 83.

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  • Millimeter Light Curves of Sagittarius A* Observed during the 2017 Event Horizon Telescope Campaign

    Wielgus, M., Marchili, N., Martí-Vidal, I., Keating, G. K., Ramakrishnan, V., Tiede, P., Fomalont, E., Issaoun, S., Neilsen, J., Nowak, M. A., Blackburn, L., Gammie, C. F., Goddi, C., Haggard, D., Lee, D., Moscibrodzka, M., Tetarenko, A. J., Bower, G. C., Chan, C. K. & Chatterjee, K. & 31 others, Chesler, P. M., Dexter, J., Doeleman, S. S., Georgiev, B., Gurwell, M., Johnson, M. D., Marrone, D. P., Mus, A., Psaltis, D., Ripperda, B., Witzel, G., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Bauböck, M., Benson, B. A., Bintley, D., Blundell, R., Kim, D. J., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 1 May 2022, In: Astrophysical Journal Letters. 930, 2, p. 1-32 32 p., L19.

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  • Resolving the Inner Parsec of the Blazar J1924-2914 with the Event Horizon Telescope

    Issaoun, S., Wielgus, M., Jorstad, S., Krichbaum, T. P., Blackburn, L., Janssen, M., Chan, C.-K., Pesce, D. W., Gomez, J. L., Akiyama, K., Moscibrodzka, M., Marti-Vidal, I., Chael, A., Lico, R., Liu, J., Ramakrishnan, V., Lisakov, M., Fuentes, A., Zhao, G.-Y. & Moriyama, K. & 31 others, Broderick, A. E., Tiede, P., MacDonald, N. R., Mizuno, Y., Traianou, E., Loinard, L., Davelaar, J., Gurwell, M., Lu, R.-S., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Bach, U., Baczko, A.-K., Ball, D., Balokovic, M., Barrett, J., Baubock, M., Benson, B. A., Bintley, D., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Kim, D.-J., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 1 Aug 2022, In: The Astrophysical Journal. 934, 2, 21 p., 145.

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  • Selective Dynamical Imaging of Interferometric Data

    Farah, J., Galison, P., Akiyama, K., Bouman, K. L., Bower, G. C., Chael, A., Fuentes, A., Gómez, J. L., Honma, M., Johnson, M. D., Kofuji, Y., Marrone, D. P., Moriyama, K., Narayan, R., Pesce, D. W., Tiede, P., Wielgus, M., Zhao, G. Y., Alberdi, A. & Alef, W. & 31 others, Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Baczko, A. K., Ball, D., Baloković, M., Barrett, J., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Boland, W., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamente, S., Byun, D. Y., Carlstrom, J. E., Chan, C. K., Chatterjee, K., Kim, D. J., Ramakrishnan, V., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 1 May 2022, In: Astrophysical Journal Letters. 930, 2, p. 1-21 21 p., L18.

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  • The Variability of the Black Hole Image in M87 at the Dynamical Timescale

    Satapathy, K., Psaltis, D., Ozel, F., Medeiros, L., Dougall, S. T., Chan, C.-K., Wielgus, M., Prather, B. S., Wong, G. N., Gammie, C. F., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Baczko, A.-K., Ball, D. & Balokovic, M. & 217 others, Barrett, J., Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Bustamente, S., Byun, D.-Y., Carlstrom, J. E., Chael, A., Chatterjee, K., Chatterjee, S., Chen, M.-T., Chen, Y., Cho, I., Christian, P., Conway, J. E., Cordes, J. M., Crawford, T. M., Crew, G. B., Cruz-Osorio, A., Cui, Y., Davelaar, J., De Laurentis, M., Deane, R., Dempsey, J., Desvignes, G., Dexter, J., Doeleman, S. S., Eatough, R. P., Falcke, H., Farah, J., Fish, V. L., Fomalont, E., Ford, H. A., Fraga-Encinas, R., Friberg, P., Fromm, C. M., Fuentes, A., Galison, P., Garcia, R., Gentaz, O., Georgiev, B., Goddi, C., Gold, R., Gomez-Ruiz, A., Gomez, J. L., Gu, M., Gurwell, M., Hada, K., Haggard, D., Hecht, M. H., Hesper, R., Ho, P., Honma, M., Huang, C.-W. L., Huang, L., Hughes, D. H., Ikeda, S., Inoue, M., Issaoun, S., James, D. J., Jannuzi, B. T., Janssen, M., Jeter, B., Jiang, W., Jimenez-Rosales, A., Johnson, M. D., Jorstad, S., Jung, T., Karami, M., Karuppusamy, R., Kawashima, T., Keating, G. K., Kettenis, M., Kim, D.-J., Kim, J.-Y., Kim, J., Kim, J., Kino, M., Koay, J. Y., Kofuji, Y., Koch, P. M., Koyama, S., Kramer, C., Kramer, M., Krichbaum, T. P., Kuo, C.-Y., Lauer, T. R., Lee, S.-S., Levis, A., Li, Y.-R., Li, Z., Lindqvist, M., Lico, R., Lindahl, G., Liu, J., Liu, K., Liuzzo, E., Lo, W.-P., Lobanov, A. P., Loinard, L., Lonsdale, C., Lu, R.-S., MacDonald, N. R., Mao, J., Marchili, N., Markoff, S., Marrone, D. P., Marscher, A. P., Marti-Vidal, I., Matsushita, S., Matthews, L. D., Menten, K. M., Mizuno, I., Mizuno, Y., Moran, J. M., Moriyama, K., Moscibrodzka, M., Mueller, C., Mejias, A. M., Musoke, G., Nagai, H., Nagar, N. M., Nakamura, M., Narayan, R., Narayanan, G., Natarajan, I., Nathanail, A., Neilsen, J., Neri, R., Ni, C., Noutsos, A., Nowak, M. A., Okino, H., Olivares, H., Ortiz-Leon, G. N., Oyama, T., Palumbo, D. C. M., Park, J., Patel, N., Pen, U.-L., Pesce, D. W., Pietu, V., Plambeck, R., PopStefanija, A., Porth, O., Potzl, F. M., Preciado-Lopez, J. A., Pu, H.-Y., Ramakrishnan, V., Rao, R., Rawlings, M. G., Raymond, A. W., Rezzolla, L., Ripperda, B., Roelofs, F., Rogers, A., Ros, E., Rose, M., Roshanineshat, A., Rottmann, H., Roy, A. L., Ruszczyk, C., Rygl, K. L. J., Sanchez, S., Sanchez-Arguelles, D., Sasada, M., Savolainen, T., Schloerb, F. P., Schuster, K.-F., Shao, L., Shen, Z., Small, D., Sohn, B. W., SooHoo, J., Sun, H., Tazaki, F., Tetarenko, A. J., Tiede, P., Tilanus, R. P. J., Titus, M., Toma, K., Torne, P., Traianou, E., Trent, T., Trippe, S., van Bemmel, I., van Langevelde, H. J., van Rossum, D. R., Wagner, J., Ward-Thompson, D., Wardle, J., Weintroub, J., Wex, N., Wharton, R., Wiik, K., Wu, Q., Yoon, D., Young, A., Young, K., Younsi, Z., Yuan, F., Yuan, Y.-F., Zensus, J. A., Zhao, G.-Y. & Zhao, S.-S., 1 Jan 2022, In: The Astrophysical Journal. 925, 1, 19 p., 13.

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  • Unraveling the Innermost Jet Structure of OJ 287 with the First GMVA + ALMA Observations

    Zhao, G. Y., Gómez, J. L., Fuentes, A., Krichbaum, T. P., Traianou, E., Lico, R., Cho, I., Ros, E., Komossa, S., Akiyama, K., Asada, K., Blackburn, L., Britzen, S., Bruni, G., Crew, G. B., Dahale, R., Dey, L., Gold, R., Gopakumar, A. & Issaoun, S. & 16 others, Janssen, M., Jorstad, S., Kim, J. Y., Koay, J. Y., Kovalev, Y. Y., Koyama, S., Lobanov, A. P., Loinard, L., Lu, R. S., Markoff, S., Marscher, A. P., Martí-Vidal, I., Mizuno, Y., Park, J., Savolainen, T. & Toscano, T., 1 Jun 2022, In: The Astrophysical Journal. 932, 1, 12 p., 72.

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  • 2021

    An Oversized Magnetic Sheath Wrapping around the Parsec-scale Jet in 3C 273

    Lisakov, M. M., Kravchenko, E. V., Pushkarev, A. B., Kovalev, Y. Y., Savolainen, T. K. & Lister, M. L., 20 Mar 2021, In: The Astrophysical Journal. 910, 1, 8 p., 35.

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  • Constraints on black-hole charges with the 2017 EHT observations of M87∗

    Kocherlakota, P., Rezzolla, L., Falcke, H., Fromm, C. M., Kramer, M., Mizuno, Y., Nathanail, A., Olivares, H., Younsi, Z., Akiyama, K., Alberdi, A., Alef, W., Algaba, J. C., Anantua, R., Asada, K., Azulay, R., Baczko, A. K., Ball, D., Baloković, M. & Barrett, J. & 31 others, Benson, B. A., Bintley, D., Blackburn, L., Blundell, R., Boland, W., Bouman, K. L., Bower, G. C., Boyce, H., Bremer, M., Brinkerink, C. D., Brissenden, R., Britzen, S., Broderick, A. E., Broguiere, D., Bronzwaer, T., Byun, D. Y., Carlstrom, J. E., Chael, A., Chan, C. K., Chatterjee, S., Chatterjee, K., Chen, M. T., Chen, Y., Chesler, P. M., Cho, I., Christian, P., Kim, D. J., Ramakrishnan, V., Savolainen, T., Wagner, J. & Event Horizon Telescope Collaboration, 20 May 2021, In: Physical Review D. 103, 10, 18 p., 104047.

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  • Event Horizon Telescope observations of the jet launching and collimation in Centaurus A

    Savolainen, T. & Event Horizon Telescope Collaboration, Oct 2021, In: Nature Astronomy. 5, 10, p. 1017-1028 12 p.

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  • Evidence of the Gaia-VLBI position differences being related to radio source structure

    Xu, M., Lunz, S., Anderson, J. M., Savolainen, T., Zubko, N. & Schuh, H., 1 Mar 2021, In: Astronomy & Astrophysics. 647, 13 p., A189.

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  • First M87 Event Horizon Telescope Results. VII. Polarization of the Ring

    Event Horizon Telescope Collaboration, 20 Mar 2021, In: Astrophysical Journal Letters. 910, 1, 48 p., 12.

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  • First M87 Event Horizon Telescope Results. VIII. Magnetic Field Structure near the Event Horizon

    Savolainen, T. & Event Horizon Telescope Collaboration, 20 Mar 2021, In: Astrophysical Journal Letters. 910, 1, 43 p., 13.

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  • Imaging VGOS Observations and Investigating Source Structure Effects

    Xu, M. H., Savolainen, T., Zubko, N., Poutanen, M., Lunz, S., Schuh, H. & Wang, G. L., Apr 2021, In: Journal of Geophysical Research: Solid Earth. 126, 4, 35 p., e2020JB021238.

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  • MOJAVE. XIX. Brightness Temperatures and Intrinsic Properties of Blazar Jets

    Homan, D. C., Cohen, M. H., Hovatta, T., Kellermann, K., Kovalev, Y. Y., Lister, M. L., Popkov, A., Pushkarev, A. B., Ros, E. & Savolainen, T., 10 Dec 2021, In: The Astrophysical Journal. 923, 1, 23 p., 67.

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  • Monitoring Of Jets in Active Galactic Nuclei with VLBA Experiments. XVIII. Kinematics and Inner Jet Evolution of Bright Radio-loud Active Galaxies

    Lister, M. L., Homan, D. C., Kellermann, K. I., Kovalev, Y. Y., Pushkarev, A. B., Ros, E. & Savolainen, T., 10 Dec 2021, In: The Astrophysical Journal. 923, 1, 19 p., 30.

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  • Observable quality assessment of broadband very long baseline interferometry system

    Xu, M., Anderson, J. M., Heinkelmann, R., Lunz, S., Schuh, H. & Wang, G., Apr 2021, In: Journal of Geodesy . 95, 5, 14 p., 51.

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  • Observing the Time Evolution of the Multicomponent Nucleus of 3C 84

    Punsly, B., Nagai, H., Savolainen, T. & Orienti, M., 16 Apr 2021, In: The Astrophysical Journal. 911, 1, 18 p., 19.

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  • Polarimetric Properties of Event Horizon Telescope Targets from ALMA

    Event Horizon Telescope Collaboration, 20 Mar 2021, In: Astrophysical Journal Letters. 910, 1, 54 p., 14.

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  • Probing the innermost regions of AGN jets and their magnetic fields with RadioAstron: IV. The quasar 3C 345 at 18 cm: Magnetic field structure and brightness temperature

    Potzl, F. M., Lobanov, A. P., Ros, E., Gomez, J. L., Bruni, G., Bach, U., Fuentes, A., Gurvits, L. I., Jauncey, D. L., Kovalev, Y. Y., Kravchenko, E. V., Lisakov, M. M., Savolainen, T., Sokolovsky, K. V. & Zensus, J. A., 14 Apr 2021, In: Astronomy and Astrophysics. 648, 10 p., A82.

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  • RadioAstron reveals a spine-sheath jet structure in 3C 273

    Bruni, G., Gómez, J. L., Vega-García, L., Lobanov, A. P., Fuentes, A., Savolainen, T., Kovalev, Y. Y., Perucho, M., Martí, J. M., Anderson, J. M., Edwards, P. G., Gurvits, L. I., Lisakov, M. M., Pushkarev, A. B., Sokolovsky, K. V. & Zensus, J. A., 6 Oct 2021, In: Astronomy and Astrophysics. 654, 9 p., 27.

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