Ultraviolet Spectropolarimetry as a Tool for Understanding the Diversity of Exoplanetary Atmospheres. Astro2020 Science White Paper - INSU - Institut national des sciences de l'Univers Access content directly
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Ultraviolet Spectropolarimetry as a Tool for Understanding the Diversity of Exoplanetary Atmospheres. Astro2020 Science White Paper

Loïc Rossi
D. Stam
A. Chiavassa

Abstract

The polarization state of starlight reflected by a planetary atmosphere uniquely reveals coverage, particle size, and composition of aerosols as well as changing cloud patterns. It is not possible to obtain a comparable level of detailed from flux-only observations. Furthermore, polarization observations can probe the atmosphere of planets independently of the orbital geometry (i.e., transiting and non-transiting planets). We show that a high-resolution spectropolarimeter with a broad wavelength coverage, particularly if attached to a large space telescope, would enable simultaneous study of the polarimetric exoplanet properties of the continuum and to look for and characterize the polarimetric signal due to scattering from single molecules.
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Dates and versions

insu-02994832 , version 1 (18-12-2020)

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L. Fossati, Loïc Rossi, D. Stam, A. Garcia Muñoz, J. Berzosa-Molina, et al.. Ultraviolet Spectropolarimetry as a Tool for Understanding the Diversity of Exoplanetary Atmospheres. Astro2020 Science White Paper. 2019. ⟨insu-02994832⟩
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