A-thano, N. orcid.org/0000-0001-7234-7167, Awiphan, S. orcid.org/0000-0003-3251-3583, Jiang, I.-G. orcid.org/0000-0001-7359-3300 et al. (11 more authors) (2023) Revisiting the transit timing and atmosphere characterization of the Neptune-mass planet HAT-P-26 b. The Astronomical Journal, 166 (6). 223. ISSN 0004-6256
Abstract
We present a transit-timing variation (TTV) and planetary atmosphere analysis of the Neptune-mass planet HAT-P-26 b. We present a new set of 13 transit light curves from optical ground-based observations and combine them with light curves from the Wide Field Camera 3 on the Hubble Space Telescope, the Transiting Exoplanet Survey Satellite, and previously published ground-based data. We refine the planetary parameters of HAT-P-26 b and undertake a TTV analysis using 33 transits obtained over seven years. The TTV analysis shows an amplitude signal of 1.98 ± 0.05 minutes, which could result from the presence of an additional ∼0.02 MJup planet at a 1:2 mean-motion resonance orbit. Using a combination of transit depths spanning optical to near-infrared wavelengths, we find that the atmosphere of HAT-P-26 b contains ${2.4}_{-1.6}^{+2.9}$% H2O with a derived temperature of ${590}_{-50}^{+60}$ K.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors.This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 06 Nov 2023 12:15 |
Last Modified: | 06 Nov 2023 12:15 |
Published Version: | http://dx.doi.org/10.3847/1538-3881/acfeea |
Status: | Published |
Publisher: | American Astronomical Society |
Refereed: | Yes |
Identification Number: | 10.3847/1538-3881/acfeea |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:204960 |