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Research Output

Article

Estimating activity cycles with probabilistic methods I. Bayesian Generalised Lomb-Scargle Periodogram with Trend

Olspert, N., Pelt, J., Käpylä, M. J. & Lehtinen, J. J., Jul 2018, In : Astronomy and Astrophysics. 615, p. 1-13 A111.

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Estimating activity cycles with probabilistic methods II: The Mount Wilson Ca H&K data

Olspert, N., Lehtinen, J. J., Käpylä, M. J., Pelt, J. & Grigorievskiy, A., 2018, In : Astronomy and Astrophysics. 619, p. 1-20 A6.

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Hidden magnetic fields of young suns

Kochukhov, O., Hackman, T., Lehtinen, J. J. & Wehrhahn, A., 1 Mar 2020, In : Astronomy and Astrophysics. 635, p. 1-23 23 p., A142.

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Long-term spot monitoring of the young solar analogue V889 Herculis

Willamo, T., Hackman, T., Lehtinen, J. J., Käpylä, M. J., Ilyin, I., Henry, G. W., Jetsu, L., Kochukhov, O. & Piskunov, N., 1 Feb 2019, In : Astronomy and Astrophysics. 622, A170.

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Magnetic fields of young solar twins

Rosén, L., Kochukhov, O., Hackman, T. & Lehtinen, J., 1 Sep 2016, In : Astronomy and Astrophysics. 593, p. 1-24 24 p., A35.

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19 Citations (Scopus)
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Multiperiodicity, modulations, and flip-flops in variable star light curves - III. Carrier fit analysis of LQ Hydrae photometry for 1982-2014

Olspert, N., Käpylä, M. J., Pelt, J., Cole, E. M., Hackman, T., Lehtinen, J. & Henry, G. W., 2015, In : Astronomy and Astrophysics. 577, 13 p., A120.

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Spot evolution on LQ Hya from 2006-2017: temperature maps based on SOFIN and FIES data

Cole-Kodikara, E. M., Kaepylae, M. J., Lehtinen, J. J., Hackman, T., Ilyin, I., Piskunov, N. & Kochukhov, O., 13 Sep 2019, In : Astronomy & Astrophysics. 629, p. 1-9 9 p., A120.

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Starspot activity of HD199178 Doppler images from 1994-2017

Hackman, T., Ilyin, I., Lehtinen, J. J., Kochukhov, O., Kaepylae, M. J., Piskunov, N. & Willamo, T., 16 May 2019, In : Astronomy & Astrophysics. 625, 10 p., 79.

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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.

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13 Citations (Scopus)
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Letter

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.

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