Status Report

Understanding Stellar Contamination in Exoplanet Transmission Spectra as an Essential Step in Small Planet Characterization

By SpaceRef Editor
March 30, 2018
Filed under , , ,

Dániel Apai, Benjamin V. Rackham, Mark S. Giampapa, Daniel Angerhausen, Johanna Teske, Joanna Barstow, Ludmila Carone, Heather Cegla, Shawn D. Domagal-Goldman, Néstor Espinoza, Helen Giles, Michael Gully-Santiago, Raphaelle Haywood, Renyu Hu, Andres Jordan, Laura Kreidberg, Michael Line, Joe Llama, Mercedes López-Morales, Mark S. Marley, Julien de Wit
(Submitted on 23 Mar 2018)

Transmission spectroscopy during planetary transits is expected to be a major source of information on the atmospheres of small (approximately Earth-sized) exoplanets in the next two decades. This technique, however, is intrinsically affected by stellar spectral contamination caused by the fact that stellar photo- and chromospheres are not perfectly homogeneous. Such stellar contamination will often reach or exceed the signal introduced by the planetary spectral features. Finding effective methods to correct stellar contamination — or at least to quantify its possible range — for the most important exoplanets is a necessary step for our understanding of exoplanet atmospheres. This will require significantly deepening our understanding of stellar heterogeneity, which is currently limited by the available data.

Comments:    White paper submitted to the NAS Committee on Exoplanet Science Strategy
Subjects:    Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as:    arXiv:1803.08708 [astro-ph.EP] (or arXiv:1803.08708v1 [astro-ph.EP] for this version)
Submission history
From: Daniel Apai Dr  
[v1] Fri, 23 Mar 2018 09:38:05 GMT (1681kb,D)

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