ExoAtmospheres
IAC community database for exoplanet atmospheric observations

tau Boo A b

CO: Detection H2O: Upper limit Molecular ratios: C/O, etc...: Detection	G-B: High resolution IR	The mystery of water in the atmosphere of $τ$ Boötis b continues: insights from revisiting archival CRIRES observations 2024, Vatsal Panwar, Matteo Brogi et al.
H2O: Detection	G-B: High resolution IR	Water observed in the atmosphere of τ Bootis Ab with CARMENES/CAHA 2022, Rebecca K. Webb, Siddharth Gandhi et al.
CO: Detection H2O: Upper limit CH4: Upper limit CO2: Upper limit HCN: Upper limit TiO: Upper limit NH3: Upper limit	G-B: High resolution IR	Where is the Water? Jupiter-like C/H ratio but strong H$_2$O depletion found on $τ$ Boötis b using SPIRou 2021, Stefan Pelletier, Björn Benneke et al.
He: Upper limit	G-B: High resolution IR	A search for He I airglow emission from the hot Jupiter tau Boo b 2020, Yapeng Zhang, I. A. G. Snellen et al.	Search of He airglow in emission
H2O: Detection	G-B: High resolution IR	Near-IR Direct Detection of Water Vapor in Tau Boötis b 2014, Lockwood, Alexandra C., Johnson, John A. et al.
CO: Detection	G-B: High resolution IR	The signature of orbital motion from the dayside of the planet τ Boötis b 2012, Brogi, Matteo, Snellen, Ignas A. G. et al.
H2O: No detection	G-B: High resolution IR	Astro-ph arXiv:2605.28635	They test three telluric absorption correction methods, but no evidence of H2O