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Study of starspots in fully convective stars using three dimensional MHD simulations

  • Arnab Basak (a1) (a2) and Dibyendu Nandy (a1) (a3) (a4)

Abstract

Concentrated magnetic structures such as sunspots and starspots play a fundamental role in driving solar and stellar activity. However, as opposed to the sun, observations as well as numerical simulations have shown that stellar spots are usually formed as high-latitude patches extended over wide areas. Using a fully spectral magnetohydrodynamic (MHD) code, we simulate polar starspots produced by self-consistent dynamo action in rapidly rotating convective shells. We carry out high resolution simulations and investigate various properties related to stellar dynamics which lead to starspot formation.

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References

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Brun, A. S., García, R. A., Houdek, G., Nandy, D., & Pinsonneault, M., 2015, Space Sci. Rev., 196, 303
Rempel, M. & Cheung, M. C. M., 2014, ApJ, 785, 90
Wicht, J., 2002, Phys. Earth Planet. Interiors, 132, 281
Yadav, R. K., Gastine, T., Christensen, U. R., & Reiners, A., 2015, A&A, 573, A68
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Keywords

Study of starspots in fully convective stars using three dimensional MHD simulations

  • Arnab Basak (a1) (a2) and Dibyendu Nandy (a1) (a3) (a4)

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