Petri Käpylä

Research Fellow

Research outputs

  1. 2020
  2. Published

    Sensitivity to luminosity, centrifugal force, and boundary conditions in spherical shell convection

    Käpylä, P. J., Gent, F. A., Olspert, N., Käpylä, M. J. & Brandenburg, A., 14 Apr 2020, In : GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS. 114, 1-2, p. 8-34

    Research output: Contribution to journalArticleScientificpeer-review

  3. E-pub ahead of print

    Common dynamo scaling in slowly rotating young and evolved stars

    Lehtinen, J. J., Spada, F., Käpylä, M. J., Olspert, N. & Käpylä, P. J., 1 Jan 2020, In : Nature Astronomy.

    Research output: Contribution to journalLetterScientificpeer-review

  4. Published

    Magnetohydrodynamical origin of eclipsing time variations in post-common-envelope binaries for solar mass secondaries

    Navarrete, F. H., Schleicher, D. R. G., Kaepylae, P. J., Schober, J., Voelschow, M. & Mennickent, R. E., Jan 2020, In : Monthly Notices of the Royal Astronomical Society. 491, 1, p. 1043-1056 14 p.

    Research output: Contribution to journalArticleScientificpeer-review

  5. 2019
  6. Published

    Stellar Dynamos in the Transition Regime: Multiple Dynamo Modes and Antisolar Differential Rotation

    Viviani, M., Kapyla, M. J., Warnecke, J., Kapyla, P. J. & Rheinhardt, M., 20 Nov 2019, In : Astrophysical Journal. 886, 1, 10 p., 21.

    Research output: Contribution to journalArticleScientificpeer-review

  7. Published

    Antisolar differential rotation of slowly rotating cool stars

    Rüdiger, G., Küker, M., Käpylä, P. J. & Strassmeier, K. G., 1 Oct 2019, In : Astronomy and Astrophysics. 630, p. 1-9 A109.

    Research output: Contribution to journalArticleScientificpeer-review

  8. Published

    Effects of a subadiabatic layer on convection and dynamos in spherical wedge simulations

    Käpylä, P., Viviani, M., Käpylä, M., Brandenburg, A. & Spada, F., 4 Mar 2019, In : GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS. 113, 1-2, p. 149-183 35 p.

    Research output: Contribution to journalArticleScientificpeer-review

  9. Published

    Magnetic and rotational quenching of the Λ effect

    Käpylä, P., Feb 2019, In : Astronomy and Astrophysics. 622, 14 p., A195.

    Research output: Contribution to journalArticleScientificpeer-review

  10. Published

    Effects of small-scale dynamo and compressibility on the Λ effect

    Käpylä, P. J., 1 Jan 2019, In : Astronomische Nachrichten.

    Research output: Contribution to journalArticleScientificpeer-review

  11. Published

    f-mode strengthening from a localised bipolar subsurface magnetic field

    Singh, N. K., Raichur, H., Käpylä, M. J., Rheinhardt, M., Brandenburg, A. & Käpylä, P. J., 1 Jan 2019, In : GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS. p. 1-17

    Research output: Contribution to journalArticleScientificpeer-review

  12. Published

    Overshooting in simulations of compressible convection

    Käpylä, P., 2019, In : Astronomy & Astrophysics. 631

    Research output: Contribution to journalArticleScientificpeer-review

  13. 2018
  14. Published

    Bihelical Spectrum of Solar Magnetic Helicity and Its Evolution

    Singh, N. K., Käpylä, M. J., Brandenburg, A., Käpylä, P. J., Lagg, A. & Virtanen, I., 20 Aug 2018, In : Astrophysical Journal. 863, 2, p. 1-11 182.

    Research output: Contribution to journalArticleScientificpeer-review

  15. Published

    Transition from axi- to nonaxisymmetric dynamo modes in spherical convection models of solar-like stars

    Viviani, M., Warnecke, J., Käpylä, M. J., Käpylä, P. J., Olspert, N., Cole-Kodikara, E. M., Lehtinen, J. J. & Brandenburg, A., 1 Aug 2018, In : Astronomy and Astrophysics. 616, p. 1-19 A160.

    Research output: Contribution to journalArticleScientificpeer-review

  16. Published

    Large-scale dynamos in rapidly rotating plane layer convection

    Bushby, P. J., Käpylä, P. J., Masada, Y., Brandenburg, A., Favier, B., Guervilly, C. & Käpylä, M. J., 1 Apr 2018, In : Astronomy and Astrophysics. 612, p. 1-16 A97.

    Research output: Contribution to journalArticleScientificpeer-review

  17. Published

    Small-scale dynamos in simulations of stratified turbulent convection

    Käpylä, P. J., Käpylä, M. J. & Brandenburg, A., 2018, In : Astronomische Nachrichten. 339, 2-3, p. 127-133

    Research output: Contribution to journalArticleScientificpeer-review

  18. Published

    Turbulent transport coefficients in spherical wedge dynamo simulations of solar-like stars

    Warnecke, J., Rheinhardt, M., Tuomisto, S., Käpylä, P. J., Käpylä, M. J. & Brandenburg, A., 2018, In : Astronomy and Astrophysics. 609, p. 1-22 22 p., A51.

    Research output: Contribution to journalArticleScientificpeer-review

  19. 2017
  20. Published

    Extended Subadiabatic Layer in Simulations of Overshooting Convection

    Käpylä, P. J., Rheinhardt, M., Brandenburg, A., Arlt, R., Käpylä, M. J., Lagg, A., Olspert, N. & Warnecke, J., 20 Aug 2017, In : Astrophysical Journal Letters. 845, 2, p. 1-6 L23.

    Research output: Contribution to journalArticleScientificpeer-review

  21. Published

    Methods for compressible fluid simulation on GPUs using high-order finite differences

    Pekkilä, J., Väisälä, M. S., Käpylä, M. J., Käpylä, P. J. & Anjum, O., Aug 2017, In : Computer Physics Communications. 217, p. 11-22

    Research output: Contribution to journalArticleScientificpeer-review

  22. Published

    Convection-driven spherical shell dynamos at varying Prandtl numbers

    Käpylä, P. J., Käpylä, M. J., Olspert, N., Warnecke, J. & Brandenburg, A., 2017, In : Astronomy and Astrophysics. 599, 18 p., A4.

    Research output: Contribution to journalArticleScientificpeer-review

  23. 2016
  24. Published

    Influence of a coronal envelope as a free boundary to global convective dynamo simulations

    Warnecke, J., Käpylä, P. J., Käpylä, M. J. & Brandenburg, A., 1 Dec 2016, In : Astronomy and Astrophysics. 596, A115.

    Research output: Contribution to journalArticleScientificpeer-review

  25. Published

    Robustness of oscillatory α 2 dynamos in spherical wedges

    Cole, E., Brandenburg, A., Käpylä, P. J. & Käpylä, M. J., 1 Sep 2016, In : Astronomy and Astrophysics. 593, p. 1-9 A134.

    Research output: Contribution to journalArticleScientificpeer-review

  26. Published

    Multiple dynamo modes as a mechanism for long-term solar activity variations

    Käpylä, M., Käpylä, P., Olspert, N., Brandenburg, A., Warnecke, J., Karak, B. B. & Pelt, J., May 2016, In : Astronomy and Astrophysics. 589, 24 p., 56.

    Research output: Contribution to journalArticleScientificpeer-review

  27. Published

    Magnetic flux concentrations from turbulent stratified convection

    Käpylä, P. J., Brandenburg, A., Kleeorin, N., Käpylä, M. J. & Rogachevskii, I., 1 Apr 2016, In : Astronomy and Astrophysics. 588, p. 1-13 A150.

    Research output: Contribution to journalArticleScientificpeer-review

  28. 2015
  29. Published

    Dynamical quenching with non-local alpha and downward pumping

    Brandenburg, A., Hubbard, A. & Käpylä, P., 2015, In : Astronomische Nachrichten. 336, 1, p. 91-96

    Research output: Contribution to journalArticleScientificpeer-review

  30. Published

    Magnetically controlled stellar differential rotation near the transition from solar to anti-solar profiles

    Karak, B. B., Käpylä, P. J., Käpylä, M. J., Brandenburg, A., Olspert, N. & Pelt, J., 2015, In : Astronomy and Astrophysics. 576, 17 p., A26.

    Research output: Contribution to journalArticleScientificpeer-review

  31. Published

    Testing turbulent closure models with convection simulations

    Snellman, J. E., Käpylä, P., Käpylä, M., Rheinhardt, M. & Dintrans, B., 2015, In : Astronomische Nachrichten. 336, 1, p. 32-52

    Research output: Contribution to journalArticleScientificpeer-review

  32. 2014
  33. Published

    An Azimuthal dynamo wave in spherical shell convection

    Cole, E., Käpylä, P. J., Mantere, M. J. & Brandenburg, A., 2014, In : Astrophysical Journal Letters. 780, 2, 6 p., L22.

    Research output: Contribution to journalArticleScientificpeer-review

  34. Published

    Confirmation of bistable stellar differential rotation profiles

    Käpylä, P. J., Käpylä, M. J. & Brandenburg, A., 2014, In : Astronomy and Astrophysics. 570, 10 p., A43.

    Research output: Contribution to journalArticleScientificpeer-review

  35. Published

    On the cause of solar-like equatorward migration in global convective dynamo simulations

    Warnecke, J., Käpylä, P. J., Käpylä, M. J. & Brandenburg, A., 2014, In : Astrophysical Journal Letters. 796, 1, 6 p., L12.

    Research output: Contribution to journalArticleScientificpeer-review

  36. Published

    Quantifying the effect of turbulent magnetic diffusion on the growth rate of the magneto-rotational instability

    Väisälä, M. S., Brandenburg, A., Mitra, D., Käpylä, P. J. & Mantere, M. J., 2014, In : Astronomy and Astrophysics. 567, 10 p., A139.

    Research output: Contribution to journalArticleScientificpeer-review

  37. Published

    Quenching and anisotropy of hydromagnetic turbulent transport

    Karak, B. B., Rheinhardt, M., Brandenburg, A., Käpylä, P. J. & Käpylä, M. J., 2014, In : Astrophysical Journal. 795, 1, 16 p.

    Research output: Contribution to journalArticleScientificpeer-review

  38. 2013
  39. Published

    Effects of enhanced stratification on equatorward dynamo wave propagation

    Käpylä, P. J., Mantere, M., Cole, E., Warnecke, J. & Brandenburg, A., 20 Nov 2013, In : Astrophysical Journal. 778, 1, 41.

    Research output: Contribution to journalArticleScientificpeer-review

  40. Published

    Effects of strong stratification on equatorward dynamo wave propagation

    Käpylä, P. J., Mantere, M. J., Cole, E., Warnecke, J. & Brandenburg, A., 2013, In : Astrophysical Journal. 778, p. 41

    Research output: Contribution to journalArticleScientificpeer-review

  41. Published

    Flux concentrations in turbulent convection

    Käpylä, P. J., Brandenburg, A., Kleeorin, N., Mantere, M. J. & Rogachevskii, I., 2013, IAU Symposium 294, Beijing, China, August 27 - August 31, 2013. Cambridge University Press, p. 283-288

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  42. Published

    Role of longitudinal activity complexes for solar and stellar dynamos

    Mantere, M. J., Käpylä, P. J. & Pelt, J., 2013, IAU Symposium 294, Beijing, China, August 27 - August 31. Cambridge University Press, p. 175-186

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  43. Published

    Solar-like differential rotation and equatorward migration in a convective dynamo with a coronal envelope

    Warnecke, J., Käpylä, P. J., Mantere, M. J. & Brandenburg, A., 2013, IAU Symposium 294, Beijing, China, August 27 - August 31, 2013. p. 307-312

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientific

  44. Published

    Spoke-like differential rotation in a convective dynamo with a coronal envelope

    Warnecke, J., Käpylä, P. J., Mantere, M. J. & Brandenburg, A., 2013, In : PROCEEDINGS OF THE INTERNATIONAL ASTRONOMICAL UNION. 778, 2, p. 141

    Research output: Contribution to journalArticleScientificpeer-review

ID: 65601