Publications

Viviani, M.; Käpylä, M. J.: Physically motivated heat conduction treatment in simulations of solar-like stars: effects on dynamo transitions. Astronomy and Astrophysics 645, A141 (2021)

Alvarez Vizoso, J.; Kirby, M.; Peterson, C.: Manifold curvature learning from hypersurface integral invariants. Linear Algebra and its Applications 602, pp. 179 - 205 (2020)

Gent, F.A.; Mac Low, M.M.; Käpylä, M. J.; Sarson, G.R.; Hollins, J.F.: Modelling supernova-driven turbulence. Geophysical and Astrophysical Fluid Dynamics 114 (1-2), pp. 77 - 105 (2020)

Jingade, N.; Singh, N. K.: Mean field dynamo action in shear flows. I: fixed kinetic helicity. Monthly Notices of the Royal Astronomical Society 495 (4), pp. 4557 - 4569 (2020)

Käpylä, M. J.; Alvarez Vizoso, J.; Rheinhardt, M.; Brandenburg, A.; Käpylä, P.; Singh, N. K.: On the Existence of Shear-current Effects in Magnetized Burgulence. The Astrophysical Journal 905 (2), 179 (2020)

Käpylä, P. J.; Gent, F. A.; Olspert, N.; Käpylä, M. J.; Brandenburg, A.: Sensitivity to luminosity, centrifugal force, and boundary conditions in spherical shell convection. Geophysical and Astrophysical Fluid Dynamics 14 (1-2), pp. 8 - 34 (2020)

Käpylä, P. J.; Rheinhardt, M.; Brandenburg, A.; Käpylä, M. J.: Turbulent viscosity and magnetic Prandtl number from simulations of isotropically forced turbulence. Astronomy and Astrophysics 636, A93 (2020)

Lehtinen, J.; Käpylä, M. J.; Olspert,, N.; Spada, F.: A Knee-Point in the Rotation-Activity Scaling of Late-type Stars with a Connection to Dynamo Transitions. (submitted)

Lehtinen, J.; Spada, F.; Käpylä, M. J.; Olspert, N.; Käpylä, P. J.: Common dynamo scaling in slowly rotating young and evolved stars. Nature astronomy 4, pp. 658 - 662 (2020)

Prabhu, A.; Brandenburg, A.; Käpylä, M. J.; Lagg, A.: Helicity proxies from linear polarisation of solar active regions. Astronomy and Astrophysics 641, A46 (2020)

Singh, N. K.; Raichur, H.; Käpylä, M. J.; Rheinhardt, M.; Brandenburg, A.; Käpylä, P. J.: f-mode strengthening from a localised bipolar subsurface magnetic field. Geophysical and Astrophysical Fluid Dynamics 114 (1-2), pp. 196 - 212 (2020)

Warnecke, J.; Käpylä, M. J.: Rotational dependence of turbulent transport coefficients in global convective dynamo simulations of solar-like stars. Astronomy and Astrophysics 642, A66 (2020)

Willamo, T.; Hackman, T.; Lehtinen, J.; Käpylä, M. J.; Olspert, N.; Viviani, M.; Warnecke, J.: Shapes of stellar activity cycles. Astrophysics & Astronomy 638, A69 (2020)

Brandenburg, A.; Bracco, A.; Kahniashvili, T.; Mandal, S.; Pol, A. R.; Petrie, G. J. D.; Singh, N. K.: E and B Polarizations from Inhomogeneous and Solar Surface Turbulence. The Astrophysical Journal 870 (2), 87 (2019)

Cole-Kodikara, E. M.; Käpylä, M. J.; Lehtinen, J.; Hackman, T.; Ilyin, I. V.; Piskunov, N.; Kochukhov, O.: Spot evolution on LQ Hya from 2006–2017: temperature maps based on SOFIN and FIES data. Astronomy and Astrophysics 629, A120 (2019)

Hackman, T.; Ilyin, I.; Lehtinen, J.; Kochukhov, O.; Käpylä, M. J.; Piskunov, N.; Willamo, T.: Starspot activity of HD 199178: Doppler images from 1994-2017. Astronomy and Astrophysics 625, A79 (2019)

Käpylä, P. J.; Viviani, M.; Käpylä, M. J.; Brandenburg, A.; Spada, F.: Effects of a subadiabatic layer on convection and dynamos in spherical wedge simulations. Geophysical and Astrophysical Fluid Dynamics 113 (1-2), pp. 149 - 183 (2019)

Losada, I. R.; Warnecke, J.; Brandenburg, A.; Kleeorin, N.; Rogachevskii, I.: Magnetic bipoles in rotating turbulence with coronal envelope. Astronomy and Astrophysics 621, A61 (2019)

Willamo, T.; Hackman, T.; Lehtinen, J.; Käpylä, M. J.; Ilyin, I.; Henry, G. W.; Jetsu, L.; Kochukhov, O.; Piskunov, N.: Long-term spot monitoring of the young solar analogue V889 Herculis. Astronomy and Astrophysics 622, A170 (2019)

Boro Saikia, S.; Marvin, C. J.; Jeffers, S. V.; Reiners, A.; Cameron, R. H.; Marsden, S. C.; Petit, P.; Warnecke, J.; Yadav, A. P.: Chromospheric activity catalogue of 4454 cool stars: Questioning the active branch of stellar activity cycles. Astronomy and Astrophysics 616, A108 (2018)