Searching for Helium Escape and a Low-density Atmosphere Around the 120 Myr Old Sub-Neptune HIP94235b Using CRIRES+

Searching for Helium Escape and a Low-density Atmosphere Around the 120 Myr Old Sub-Neptune HIP94235b Using CRIRES+

Atmospheric mass loss is thought to induce the bimodality in the small planet population as we observe it today. Observationally, active mass loss can be traced by excess absorption in spectral lines of lighter species, such as the hydrogen Ly α line and the metastable helium triplet. We search for...

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Bibliographic Details
Main Authors: Ava Morrissey, George Zhou, Chelsea X. Huang, Duncan Wright, Neale Gibson, Keighley E. Rockcliffe, Elisabeth R. Newton, James Kirk, Daniel Bayliss
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Series:The Astronomical Journal
Subjects:
Observational astronomy
Exoplanet astronomy
Exoplanet atmospheres
Exoplanet atmospheric evolution
Online Access:https://doi.org/10.3847/1538-3881/ade1da
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