Petri Käpylä

Research Fellow

Research outputs

  1. 2019
  2. 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 journalArticle

  3. 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 journalArticle

  4. 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 journalArticle

  5. E-pub ahead of print
  6. Published
  7. 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 journalArticle

  8. E-pub ahead of print

    Magnetic and rotational quenching of the Λ effect

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

    Research output: Contribution to journalArticle

  9. 2018
  10. 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 journalArticle

  11. 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 journalArticle

  12. 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 journalArticle

  13. 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 journalArticle

  14. 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 journalArticle

  15. 2017
  16. 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 journalArticle

  17. 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 journalArticle

  18. 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 journalArticle

  19. 2016
  20. 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 journalArticle

  21. 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 journalArticle

  22. 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 journalArticle

  23. 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 journalArticle

  24. 2015
  25. 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 journalArticle

  26. 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 journalArticle

  27. 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 journalArticle

  28. 2014
  29. 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 journalArticle

  30. 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 journalArticle

  31. 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 journalArticle

  32. 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 journalArticle

  33. 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 journalArticle

  34. 2013
  35. 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 journalArticle

  36. 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 journalArticle

  37. 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

  38. 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

  39. 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

  40. 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 journalArticle

ID: 65601