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A Multi-Species Atmospheric Escape Model with Excited Hydrogen and Helium: Application to HD209458b - Astrobiology

Summary by astrobiology.com
Atmospheric escape shapes exoplanet evolution and star-planet interactions, with He I 10830 Å absorption serving as a key tracer of mass loss in hot gas giants. However, transit depths vary significantly across observed systems for reasons that remain poorly understood. HD209458b, the archetypal hot-Jupiter, exhibits relatively weak He I 10830 Å and Hα absorption, which […] The post A Multi-Species Atmospheric Escape Model with Excited Hydrogen …
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astrobiology.com broke the news in on Friday, June 13, 2025.
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