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High-resolution transit spectroscopy of warm saturns
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Deibert, Emily K., de Mooij, Ernst J. W., Jayawardhana, Ray, Fortney, Jonathan J., Brogi, Matteo, Rustamkulov, Zafar and Tamura, Motohide (2019) High-resolution transit spectroscopy of warm saturns. The Astronomical Journal, 157 (2). 58. doi:10.3847/1538-3881/aaf56b
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Official URL: http://dx.doi.org/10.3847/1538-3881/aaf56b
Abstract
We present high-resolution optical transmission spectroscopy of two sub-Saturn mass transiting exoplanets, HAT-P-12b and WASP-69b. With relatively low densities and high atmospheric scale heights, these planets are particularly well-suited to characterization through transit spectroscopy, and serve as ideal candidates for extending previously tested methods to lower planetary masses. Using a single transit for each planet, we take advantage of the Doppler cross-correlation technique to search for sodium, potassium, and water absorption features. Our analysis reveals a likely (3.2σ) detection of sodium absorption features in the atmosphere of HAT-P-12b, and enables us to place constraints on the presence of alkaline and molecular species in the atmospheres of both planets. With our results, we highlight the efficacy of ground-based campaigns for characterizing exoplanetary atmospheres and pave the way for future analyses of low-mass planets.
| Item Type: | Journal Article | |||||||||||||||||||||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||||||||||||||||||||
| Divisions: | Faculty of Science > Physics | |||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Planets -- Atmospheres, High resolution spectroscopy | |||||||||||||||||||||||||||
| Journal or Publication Title: | The Astronomical Journal | |||||||||||||||||||||||||||
| Publisher: | Institute of Physics Publishing, Inc. | |||||||||||||||||||||||||||
| ISSN: | 0004-6256 | |||||||||||||||||||||||||||
| Official Date: | 18 January 2019 | |||||||||||||||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 28 February 2019 | |||||||||||||||||||||||||||
| Volume: | 157 | |||||||||||||||||||||||||||
| Number: | 2 | |||||||||||||||||||||||||||
| Article Number: | 58 | |||||||||||||||||||||||||||
| DOI: | 10.3847/1538-3881/aaf56b | |||||||||||||||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||
| Copyright Holders: | © 2019. The American Astronomical Society. All rights reserved | |||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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