A Nondetection of Iron in the First High-resolution Emission Study of the Lava Planet 55 Cnc e

Rasmussen, Kaitlin C. and Currie, Miles H. and Hagee, Celeste and van Buchem, Christiaan and Malik, Matej and Savel, Arjun B and Brogi, Matteo and Rauscher, Emily and Meadows, Victoria and Mansfield, Megan and Kempton, Eliza M.-R. and Desert, Jean-Michel and Wardenier, Joost P. and Pino, Lorenzo and Line, Michael and Parmentier, Vivien and Seifahrt, Andreas and Kasper, David and Brady, Madison and Bean, Jacob L. (2023) A Nondetection of Iron in the First High-resolution Emission Study of the Lava Planet 55 Cnc e. The Astronomical Journal, 166 (4). p. 155. ISSN 0004-6256

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Abstract

Close-in lava planets represent an extreme example of terrestrial worlds, but their high temperatures may allow us to probe a diversity of crustal compositions. The brightest and most well-studied of these objects is 55 Cancri e, a nearby super-Earth with a remarkably short 17 hr orbit. However, despite numerous studies, debate remains about the existence and composition of its atmosphere. We present upper limits on the atmospheric pressure of 55 Cnc e derived from high-resolution time-series spectra taken with Gemini-N/MAROON-X. Our results are consistent with current crustal evaporation models for this planet which predict a thin ∼100 mbar atmosphere. We conclude that, if a mineral atmosphere is present on 55 Cnc e, the atmospheric pressure is below 100 mbar.

Item Type: Article
Subjects: European Scholar > Physics and Astronomy
Depositing User: Managing Editor
Date Deposited: 10 Nov 2023 04:59
Last Modified: 10 Nov 2023 04:59
URI: http://article.publish4promo.com/id/eprint/2850

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