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Characterization of stellar activity using transits and its impact on habitability

Show simple item record Estrela, Raissa Valio, Adriana Palit, Sourav 2021-11-01T18:34:54Z 2021-11-01T18:34:54Z 2020-07-06
dc.identifier.citation International Astronomical Union (IAU) Symposium: Multi-scale (time and mass) dynamics of space objects, Iasi, Romania, July 6-10, 2020
dc.identifier.clearanceno CL#20-0002
dc.description.abstract 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.
dc.description.sponsorship NASA/JPL en_US
dc.language.iso en_US
dc.publisher Pasadena, CA: Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2020
dc.title Characterization of stellar activity using transits and its impact on habitability
dc.type Preprint

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