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The hot neptune WASP-166 b with ESPRESSO II : confirmation of atmospheric sodium
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Seidel, J. V., Cegla, H. M., Doyle, Lauren, Lafarga, M., Brogi, Matteo, Gandhi, Siddharth, Anderson, David, Allart, R., Buchschacher, N., Lovis, C. and Sosnowska, D. (2022) The hot neptune WASP-166 b with ESPRESSO II : confirmation of atmospheric sodium. Monthly Notices of the Royal Astronomical Society: Letters, 513 (1). L15-L19. doi:10.1093/mnrasl/slac027 ISSN 1745-3925.
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Official URL: https://doi.org/10.1093/mnrasl/slac027
Abstract
The hot Neptune desert, a distinct lack of highly irradiated planets in the size range of Neptune, remains one of the most intriguing results of exoplanet population studies. A deeper understanding of the atmosphere of exoplanets sitting at the edge or even within the Neptune desert will allow us to better understand if planetary formation or evolution processes are at the origin of the desert. A detection of sodium in WASP-166 b was presented previously with tentative line broadening at the 3.4 σ with the HARPS spectrograph. We update this result with two transits observed with the ESPRESSO spectrograph, confirming the detection in each night and the broadened character of the line. This result marks the first confirmed resolved sodium detection within the Neptune desert. In this work, we additionally highlight the importance of treating low-SNR spectral regions particularly where absorption lines of stellar sodium and planetary sodium overlap at mid-transit - an important caveat for future observations of the system.
Item Type: | Journal Article | |||||||||
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Subjects: | Q Science > QB Astronomy | |||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||
SWORD Depositor: | Library Publications Router | |||||||||
Library of Congress Subject Headings (LCSH): | Extrasolar planets -- Atmopsheres, Extrasolar planets -- Detection, Planetary systems, Astronomical instruments | |||||||||
Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society: Letters | |||||||||
Publisher: | Wiley | |||||||||
ISSN: | 1745-3925 | |||||||||
Official Date: | June 2022 | |||||||||
Dates: |
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Volume: | 513 | |||||||||
Number: | 1 | |||||||||
Page Range: | L15-L19 | |||||||||
DOI: | 10.1093/mnrasl/slac027 | |||||||||
Status: | Peer Reviewed | |||||||||
Publication Status: | Published | |||||||||
Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters Copyright © 2022 Oxford University Press Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | |||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||
Date of first compliant deposit: | 24 May 2022 | |||||||||
Date of first compliant Open Access: | 24 May 2022 | |||||||||
RIOXX Funder/Project Grant: |
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