Papers › Evidence of Water Vapor in the Atmosphere of a Metal-Rich Hot Saturn with...
Evidence of Water Vapor in the Atmosphere of a Metal-Rich Hot Saturn with High-Resolution Transmission Spectroscopy
Sayyed A. Rafi, Stevanus K. Nugroho, Motohide Tamura, Lisa Nortmann, Alejandro Sánchez-López
The archive published only this paper's code-link row. Authors, date and abstract are from arXiv's metadata (CC0), read from the Kaggle arXiv metadata snapshot of 2026-09-12 where its title matched the archive's; the title is the archive's.
Transmission spectroscopy presents one of the most successful approaches for investigating the atmospheres of exoplanets. We analyzed the near-infrared high-resolution transmission spectrum of a hot Saturn, HD 149026 b, taken using CARMENES spectrograph (ℛ∼80,400). We found evidence of H₂O at an S/N of ∼4.8. We also performed grid search using a Bayesian framework and constrained the orbital velocity Kₚ and rest velocity Vᵣₑₛₜ to 158.17^(+8.31)_(-7.90) km s⁻¹ and 2.57^(+0.54)_(-0.57) km s⁻¹, respectively. Whilst the retrieved Kₚ value is consistent with theoretical prediction, the retrieved Vᵣₑₛₜ value is highly red-shifted ($>3-\sigma$). This might be an indication of either anomalous atmospheric dynamics at play or an orbit with non-zero eccentricity. Additionally, we searched for HCN but no successful detection has been made possibly due to the relatively low S/N dataset. The detection of H₂O and subsequent abundance retrieval, coupled with analysis of other species such as CO at the K-band, for example, might help us to get some information about the atmospheric C/O ratio and metallicity, which in turn could give us some insight into the planet formation scenario.
Code
Repository list and official/mentioned flags are the archive's, frozen 2025-07-28. Reachability, where shown, is from one Syntology probe window (2026-09-16 to 2026-09-18); repositories not probed show nothing. GitHub stars are not tracked.
Code Syntology ran Syntology
Not run by Syntology. Nothing on this page verifies that the listed code works.
Results from the paper archive 2025-07-28
No leaderboard rows for this paper in the archive.
Report a problem or propose a change · a person checks every report against the paper or source before anything changes; decisions are listed on /corrections