paper

Magnetism and activity of planet hosting stars

arXiv:1706.07102 · doi:10.1017/S1743921316002143

Abstract

The magnetic activity levels of planet host stars may differ from that of stars not known to host planets in several ways. Hot Jupiters may induce activity in their hosts through magnetic interactions, or through tidal interactions by affecting their host's rotation or convection. Measurements of photospheric, chromospheric, or coronal activity might then be abnormally high or low compared to control stars that do not host hot Jupiters, or might be modulated at the planet's orbital period. Such detections are complicated by the small amplitude of the expected signal, by the fact that the signals may be transient, and by the difficulty of constructing control samples due to exoplanet detection biases and the uncertainty of field star ages. We review these issues, and discuss avenues for future progress in the field.

arXiv comment10 pp, 4 figures. From "Chapter 9: Flares and star-planet interaction"; Solar and Stellar Flares and Their Effects on Planets, Proceedings IAU Symposium No. 320, 2015, A.G. Kosovichev, S.L. Hawley & P. Heinzel, eds., From the 2015 IAU General Assembly in Honolulu, HI, USA, Focus Meeting 13: Brightness Variations of the Sun and Sun-like Stars, 5-6 August 2015

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