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The Influences of Stellar Activity on Planetary Atmospheres

Published online by Cambridge University Press:  12 September 2017

Colin P. Johnstone
Colin P. Johnstone*
Affiliation:
University of Vienna, Department of Astrophysics, Türkenschanzstrasse 17, 1180 Vienna, Austria email: [email protected]
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Abstract

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On evolutionary timescales, the atmospheres of planets evolve due to interactions with the planet's surface and with the planet's host star. Stellar X-ray and EUV (=’XUV’) radiation is absorbed high in the atmosphere, driving photochemistry, heating the gas, and causing atmospheric expansion and mass loss. Atmospheres can interact strongly with the stellar winds, leading to additional mass loss. In this review, I summarise some of the ways in which stellar output can influence the atmospheres of planets. I will discuss the importance of simultaneously understanding the evolution of the star's output and the time dependent properties of the planet's atmosphere.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S328: Living Around Active Stars , October 2016 , pp. 168 - 179
Copyright
Copyright © International Astronomical Union 2017 

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