Stellar Model Chromospheres and Spectroscopic Diagnostics
The discovery of exoplanets and the desire to understand their atmospheric chemical composition and habitability provides a new rationale for understanding the radiation from X-rays to radio wavelengths emitted by their host stars. Semiempirical models of stellar atmospheres that include accurate tr...
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| Veröffentlicht in: | Annual review of astronomy and astrophysics 2017-08, Vol.55 (1), p.159-211 |
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| container_title | Annual review of astronomy and astrophysics |
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| creator | Linsky, Jeffrey L |
| description | The discovery of exoplanets and the desire to understand their atmospheric chemical composition and habitability provides a new rationale for understanding the radiation from X-rays to radio wavelengths emitted by their host stars. Semiempirical models of stellar atmospheres that include accurate treatment of radiative transfer of all important atoms, ions, and molecules provide the essential basis for understanding a star's emitted radiation that is our main data source for characterizing a star and the radiation environment of its exoplanets. In Solar-type and cooler stars, the ultraviolet and extreme ultraviolet radiation formed in their chromospheres and transition regions drive the photochemistry in exoplanet atmospheres. In this review, I describe and critique the development of semiempirical static and time-dependent models of the chromospheres and transition regions of the Sun and cooler stars as well as the spectroscopic diagnostics upon which these models are based. The related topics of stellar coronae and winds and their theoretical bases are beyond the scope of this review. |
| doi_str_mv | 10.1146/annurev-astro-091916-055327 |
| format | Article |
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Semiempirical models of stellar atmospheres that include accurate treatment of radiative transfer of all important atoms, ions, and molecules provide the essential basis for understanding a star's emitted radiation that is our main data source for characterizing a star and the radiation environment of its exoplanets. In Solar-type and cooler stars, the ultraviolet and extreme ultraviolet radiation formed in their chromospheres and transition regions drive the photochemistry in exoplanet atmospheres. In this review, I describe and critique the development of semiempirical static and time-dependent models of the chromospheres and transition regions of the Sun and cooler stars as well as the spectroscopic diagnostics upon which these models are based. 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| identifier | ISSN: 0066-4146 |
| ispartof | Annual review of astronomy and astrophysics, 2017-08, Vol.55 (1), p.159-211 |
| issn | 0066-4146 1545-4282 |
| language | eng |
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| source | Annual Reviews Complete A-Z List |
| subjects | Astronomical models Astronomy Atmosphere Atmospheric models Chemical composition Chemistry emission lines Extrasolar planets Extreme ultraviolet radiation Habitability Photochemistry Planetary atmospheres Radiation Radiative transfer radio emission solar chromosphere Spectroscopy Spectrum analysis Stars Stars & galaxies Stellar atmospheres Stellar models transition regions ultraviolet Ultraviolet radiation Wavelengths Wind |
| title | Stellar Model Chromospheres and Spectroscopic Diagnostics |
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