EUV influences on exoplanet atmospheric stability and evolution
| Autor: | Youngblood, Allison, France, Kevin, Koskinen, Tommi, Fossati, Luca, Amerstorfer, Ute, Lichtenegger, Herbert, Drake, Jeremy, Mason, James, Fleming, Brian, Allred, Joel, Berta-Thompson, Zachory, Bourrier, Vincent, Froning, Cynthia, Garraffo, Cecilia, Gronoff, Guillaume, Jin, Meng, Kowalski, Adam, Osten, Rachel |
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| Rok vydání: | 2019 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | The planetary effective surface temperature alone is insufficient to characterize exoplanet atmospheres and their stability or evolution. Considering the star-planet system as a whole is necessary, and a critical component of the system is the photoionizing stellar extreme ultraviolet emission (EUV; 100-912 {\AA}). EUV photons drive atmospheric mass loss through thermal and nonthermal processes, and an accurate accounting of the EUV energy deposition in a planet's energy budget is essential, especially for terrestrial habitable zone planets and close-in gaseous planets. Direct EUV observations of exoplanet host stars would require a new, dedicated observatory. Archival observations from the $\textit{EUVE}$ satellite, models, and theory alone are insufficient to accurately characterize EUV spectra of the majority of exoplanet host stars, especially for low-mass stars. Comment: Science white paper submitted to the Astro2020 Decadal Survey. 7 pages, 2 figures |
| Databáze: | arXiv |
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