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Stellar Coronal Activity and Its Impact on Planets

Date Issued
2018
Author(s)
DOI
Abstract
In this chapter the relevance of stellar coronal activity in determining the physical conditions of planetary atmospheres is discussed. We still lack a comprehensive, self-consistent picture of the role of stellar activity, during the star lifespan, in determining and shaping the evolution of planetary atmospheres, after the circumstellar disk has been cleared out, but many efforts in this direction are today ongoing. Here we focus on high-energy radiation since it penetrates deeply the atmosphere ionizing and heating the gas, thus affecting its chemistry with consequences very different from those of optical or UV radiation. Stellar activity is inhomogeneous and variable; flares in particular can be very frequent and intense in young and dM stars. Depending on their duty cycle, they may drive the atmospheric gas toward different chemical regimes.
Coverage
Handbook of Exoplanets
Start page
19
Uri
Url
Ads BibCode
2018haex.bookE..19M
Rights
restricted
File(s)
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Micela2018_ReferenceWorkEntry_StellarCoronalActivityAndItsIm.pdf

Description
[Administrators only]
Size

479 KB

Format

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