TY - JOUR
T1 - Characterization of stellar activity using transits and its impact on habitability
AU - Estrela, Raissa
AU - Valio, Adriana
AU - Palit, Sourav
AU - Kosovichev, Alexander
AU - Strassmeier, Klaus
AU - Jardine, Moira
N1 - Publisher Copyright:
© 2020 International Astronomical Union.
PY - 2020
Y1 - 2020
N2 - Stellar magnetic field is the driver of activity in stars and can trigger spots, energetic flares, coronal plasma ejections and ionized winds. These phenomena play a crucial role in understanding the internal mechanisms of the star, but can also have potential effects in orbiting planets. During the transit of a planet, spots can be occulted producing features imprinted in the transit light curve. Here, we modelled these features to characterize the physical properties of the spots (radius, intensity, and location). In addition, we monitor spots signatures on multiple transits to estimate magnetic cycles length of Kepler stars. Flares have also been observed during transits in active stars. We derive the properties of the flares and analyse their UV impact on possible living organisms in planets orbiting in the habitable zone.
AB - Stellar magnetic field is the driver of activity in stars and can trigger spots, energetic flares, coronal plasma ejections and ionized winds. These phenomena play a crucial role in understanding the internal mechanisms of the star, but can also have potential effects in orbiting planets. During the transit of a planet, spots can be occulted producing features imprinted in the transit light curve. Here, we modelled these features to characterize the physical properties of the spots (radius, intensity, and location). In addition, we monitor spots signatures on multiple transits to estimate magnetic cycles length of Kepler stars. Flares have also been observed during transits in active stars. We derive the properties of the flares and analyse their UV impact on possible living organisms in planets orbiting in the habitable zone.
KW - stars: Activity, astrobiology
KW - stars: Flare
KW - ultraviolet: Stars
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U2 - 10.1017/S1743921320000174
DO - 10.1017/S1743921320000174
M3 - Article
AN - SCOPUS:85093950784
SN - 1743-9213
SP - 461
EP - 466
JO - Proceedings of the International Astronomical Union
JF - Proceedings of the International Astronomical Union
ER -