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ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3


Pluriel, W and Whiteford, N and Edwards, B and Changeat, Q and Yip, KH and Baeyens, R and Al-Refaie, A and Fabienne Bieger, M and Blain, D and Gressier, A and Guilluy, G and Yassin Jaziri, A and Kiefer, F and Modirrousta-Galian, D and Morvan, M and Mugnai, LV and Poveda, M and Skaf, N and Zingales, T and Wright, S and Charnay, B and Drossart, P and Leconte, J and Tsiaras, A and Venot, O and Waldmann, I and Beaulieu, J-P, ARES. III. Unveiling the Two Faces of KELT-7 b with HST WFC3, Astronomical Journal, 160, (3) Article 112. ISSN 0004-6256 (2020) [Refereed Article]

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DOI: doi:10.3847/1538-3881/aba000


We present the analysis of the hot-Jupiter KELT-7 b using transmission and emission spectroscopy from the Hubble Space Telescope, both taken with the Wide Field Camera 3. Our study uncovers a rich transmission spectrum that is consistent with a cloud-free atmosphere and suggests the presence of H2O and H-. In contrast, the extracted emission spectrum does not contain strong absorption features and, although it is not consistent with a simple blackbody, it can be explained by a varying temperature-pressure profile, collision induced absorption, and H-. KELT-7 b had also been studied with other space-based instruments and we explore the effects of introducing these additional data sets. Further observations with Hubble, or the next generation of space-based telescopes, are needed to allow for the optical opacity source in transmission to be confirmed and for molecular features to be disentangled in emission.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Beaulieu, J-P (Dr Jean-Philippe Beaulieu)
ID Code:152298
Year Published:2020
Web of Science® Times Cited:21
Deposited By:Plant Science
Deposited On:2022-08-16
Last Modified:2022-09-15

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