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ARES III: Unveiling the Two Faces of KELT-7 b with HST WFC3
- Source :
- The Astronomical Journal, Volume 160, Issue 3, id.112, September 2020
- Publication Year :
- 2020
-
Abstract
- We present the analysis of the hot-Jupiter KELT-7b using transmission and emission spectroscopy from the Hubble Space Telescope (HST), both taken with the Wide Field Camera 3 (WFC3). Our study uncovers a rich transmission spectrum which 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 (CIA) and H-. KELT-7 b had also been studied with other space-based instruments and we explore the effects of introducing these additional datasets. 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.<br />Comment: 19 pages, 11 figures, accepted in AJ on June 23, 2020
- Subjects :
- Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- The Astronomical Journal, Volume 160, Issue 3, id.112, September 2020
- Publication Type :
- Report
- Accession number :
- edsarx.2006.14199
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.3847/1538-3881/aba000