H-Alpha Variability of V1298 Tau c

Everett Schlawin; Ilya Ilyin; Adina D. Feinstein; Jacob Bean; Chenliang Huang; Peter Gao; Klaus Strassmeier; Katja Poppenhaeger

H-Alpha Variability of V1298 Tau c

Earth and Planetary Astrophysics 2021-08-23 v1

Authors: Everett Schlawin , Ilya Ilyin , Adina D. Feinstein , Jacob Bean , Chenliang Huang , Peter Gao , Klaus Strassmeier , Katja Poppenhaeger

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Abstract

The 23 Myr system V1298 Tau hosts four transiting planets and is a valuable laboratory for exploring the early stages of planet evolution soon after formation of the star. We observe the innermost planet, V1298 Tau c, during transit using LBT PEPSI to obtain high spectral resolution characterization of escaping material near the H-alpha line. We find no strong evidence for atmospheric material escaping at the orbital velocity of the planet. Instead, we find a deep stellar feature that is variable on the few percent level, similar to a previous observation of the planet and can be explained by stellar activity. We attempted to monitor the broadband optical transit with LBT MODS but do not achieve the precision needed to characterize the atmosphere or improve the ephemeris.

Keywords

v1298 tau c h-alpha variability young planetary system transiting planet stellar activity escaping atmosphere high-resolution spectroscopy

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@article{arxiv.2108.08851,
  title  = {H-Alpha Variability of V1298 Tau c},
  author = {Everett Schlawin and Ilya Ilyin and Adina D. Feinstein and Jacob Bean and Chenliang Huang and Peter Gao and Klaus Strassmeier and Katja Poppenhaeger},
  journal= {arXiv preprint arXiv:2108.08851},
  year   = {2021}
}

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Published in the Research Notes of the AAS

H-Alpha Variability of V1298 Tau c

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