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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

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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
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:
DateEvent
18 January 2019Published
30 November 2018Accepted
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:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIEDUniversity of Torontohttp://dx.doi.org/10.13039/501100003579
UNSPECIFIED[NSERC] Natural Sciences and Engineering Research Council of Canadahttp://dx.doi.org/10.13039/501100000038
18H05442[MEXT] Ministry of Education, Culture, Sports, Science and Technologyhttp://dx.doi.org/10.13039/501100001700
18H05442[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
15H02063[MEXT] Ministry of Education, Culture, Sports, Science and Technologyhttp://dx.doi.org/10.13039/501100001700
15H02063[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
22000005[MEXT] Ministry of Education, Culture, Sports, Science and Technologyhttp://dx.doi.org/10.13039/501100001700
22000005[JSPS] Japan Society for the Promotion of Sciencehttp://dx.doi.org/10.13039/501100001691
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