The Library
TOI-2109 : an ultrahot gas giant on a 16 hr orbit
Tools
(2021) TOI-2109 : an ultrahot gas giant on a 16 hr orbit. The Astronomical Journal, 162 (6). 256. doi:10.3847/1538-3881/ac26bd ISSN 0004-6256.
|
PDF
WRAP-TOI-2109-ultrahot-gas-giant-16-hr-orbit-Heng-2021.pdf - Published Version - Requires a PDF viewer. Download (2848Kb) | Preview |
Official URL: https://doi.org/10.3847/1538-3881/ac26bd
Abstract
Exoplanet Survey Satellite (TESS) mission, orbits TOI-2109 (TIC 392476080)—a Teff ∼ 6500 K F-type star with a mass of 1.447 ± 0.077 M☉, a radius of 1.698 ± 0.060 R☉, and a rotational velocity of v sin i* = 81.9 ± 1.7 km s^−1 . The planetary nature of TOI-2109b was confirmed through radial-velocity measurements, which yielded a planet mass of 5.02 ± 0.75 MJup. Analysis of the Doppler shadow in spectroscopic transit observations indicates a well-aligned system, with a sky-projected obliquity of λ = 1°.7 ± 1°.7. From the TESS full-orbit light curve, we measured a secondary eclipse depth of 731 ± 46 ppm, as well as phase-curve variations from the planet’s longitudinal brightness modulation and ellipsoidal distortion of the host star. Combining the TESS-band occultation measurement with a Ks-band secondary eclipse depth (2012 ± 80 ppm) derived from ground-based observations, we find that the dayside emission of TOI-2109b is consistent with a brightness temperature of 3631 ± 69 K, making it the second hottest exoplanet hitherto discovered. By virtue of its extreme irradiation and strong planet–star gravitational interaction, TOI-2109b is an exceptionally promising target for intensive follow-up studies using current and near-future telescope facilities to probe for orbital decay, detect tidally driven atmospheric escape, and assess the impacts of H2 dissociation and recombination on the global heat transport.
Item Type: | Journal Article | |||||||||||||||||||||||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
|||||||||||||||||||||||||||||||||||||||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||||||||||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Outer planets, Extrasolar planets -- Detection , Astronomical photometry, Extrasolar planets, Solar cycle, Orbits | |||||||||||||||||||||||||||||||||||||||||||||||||||
Journal or Publication Title: | The Astronomical Journal | |||||||||||||||||||||||||||||||||||||||||||||||||||
Publisher: | Institute of Physics Publishing, Inc. | |||||||||||||||||||||||||||||||||||||||||||||||||||
ISSN: | 0004-6256 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Official Date: | 23 November 2021 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Dates: |
|
|||||||||||||||||||||||||||||||||||||||||||||||||||
Volume: | 162 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Number: | 6 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Article Number: | 256 | |||||||||||||||||||||||||||||||||||||||||||||||||||
DOI: | 10.3847/1538-3881/ac26bd | |||||||||||||||||||||||||||||||||||||||||||||||||||
Status: | Peer Reviewed | |||||||||||||||||||||||||||||||||||||||||||||||||||
Publication Status: | Published | |||||||||||||||||||||||||||||||||||||||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||||||||||||||||||||||||||||||||||||||
Copyright Holders: | © 2021. The American Astronomical Society. All rights reserved. | |||||||||||||||||||||||||||||||||||||||||||||||||||
Date of first compliant deposit: | 25 February 2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||
Date of first compliant Open Access: | 25 February 2022 | |||||||||||||||||||||||||||||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
|
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year