Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b***
(2024) In Astronomy and Astrophysics 684.- Abstract
- Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been confirmed by multiple studies, but its physical origin is still under debate. In addition, it contrasts with the absence of asymmetry reported in the infrared (IR) phase curve. Aims. We provide a more comprehensive dataset of WASP-76 b with the goal of drawing a complete view of the physical processes at work in this atmosphere. In particular, we attempt to reconcile visible high-resolution transit spectroscopy data and IR broadband phase curves. Methods. We gathered 3 phase curves, 20... (More)
- Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been confirmed by multiple studies, but its physical origin is still under debate. In addition, it contrasts with the absence of asymmetry reported in the infrared (IR) phase curve. Aims. We provide a more comprehensive dataset of WASP-76 b with the goal of drawing a complete view of the physical processes at work in this atmosphere. In particular, we attempt to reconcile visible high-resolution transit spectroscopy data and IR broadband phase curves. Methods. We gathered 3 phase curves, 20 occultations, and 6 transits for WASP-76 b in the visible with the CHEOPS space telescope. We also report the analysis of three unpublished sectors observed by the TESS space telescope (also in the visible), which represents 34 phase curves. Results. WASP-76 b displays an occultation of 260 ± 11 and 152 ± 10 ppm in TESS and CHEOPS bandpasses respectively. Depending on the composition assumed for the atmosphere and the data reduction used for the IR data, we derived geometric albedo estimates that range from 0.05 ± 0.023 to 0.146 ± 0.013 and from (Less)
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https://lup.lub.lu.se/record/abf6834e-7566-46f1-8033-ba02b9f08826
- author
- Demangeon, O.D.S. ; Davies, M.B. LU and Walton, N.A.
- author collaboration
- organization
- publishing date
- 2024
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- planets, planets and satellites: atmospheres, satellites: composition, techniques: photometric, Exoplanets, Orbits, Photometry, Space telescopes, Asymmetric signature, Band pass, High resolution, Infrared data, Jupiters, Physical process, Planets and satellites: atmospheres, Satellite: composition, Spectroscopy data, Techniques: photometric, Satellites
- in
- Astronomy and Astrophysics
- volume
- 684
- article number
- A27
- publisher
- EDP Sciences
- external identifiers
-
- scopus:85190485487
- ISSN
- 0004-6361
- DOI
- 10.1051/0004-6361/202348270
- language
- English
- LU publication?
- yes
- id
- abf6834e-7566-46f1-8033-ba02b9f08826
- date added to LUP
- 2024-05-02 10:54:22
- date last changed
- 2024-05-02 10:55:14
@article{abf6834e-7566-46f1-8033-ba02b9f08826,
abstract = {{Context. WASP-76 b has been a recurrent subject of study since the detection of a signature in high-resolution transit spectroscopy data indicating an asymmetry between the two limbs of the planet. The existence of this asymmetric signature has been confirmed by multiple studies, but its physical origin is still under debate. In addition, it contrasts with the absence of asymmetry reported in the infrared (IR) phase curve. Aims. We provide a more comprehensive dataset of WASP-76 b with the goal of drawing a complete view of the physical processes at work in this atmosphere. In particular, we attempt to reconcile visible high-resolution transit spectroscopy data and IR broadband phase curves. Methods. We gathered 3 phase curves, 20 occultations, and 6 transits for WASP-76 b in the visible with the CHEOPS space telescope. We also report the analysis of three unpublished sectors observed by the TESS space telescope (also in the visible), which represents 34 phase curves. Results. WASP-76 b displays an occultation of 260 ± 11 and 152 ± 10 ppm in TESS and CHEOPS bandpasses respectively. Depending on the composition assumed for the atmosphere and the data reduction used for the IR data, we derived geometric albedo estimates that range from 0.05 ± 0.023 to 0.146 ± 0.013 and from}},
author = {{Demangeon, O.D.S. and Davies, M.B. and Walton, N.A.}},
issn = {{0004-6361}},
keywords = {{planets; planets and satellites: atmospheres; satellites: composition; techniques: photometric; Exoplanets; Orbits; Photometry; Space telescopes; Asymmetric signature; Band pass; High resolution; Infrared data; Jupiters; Physical process; Planets and satellites: atmospheres; Satellite: composition; Spectroscopy data; Techniques: photometric; Satellites}},
language = {{eng}},
publisher = {{EDP Sciences}},
series = {{Astronomy and Astrophysics}},
title = {{Asymmetry in the atmosphere of the ultra-hot Jupiter WASP-76 b***}},
url = {{http://dx.doi.org/10.1051/0004-6361/202348270}},
doi = {{10.1051/0004-6361/202348270}},
volume = {{684}},
year = {{2024}},
}