ExoAtmospheres
IAC community database for exoplanet atmospheric observations

WASP-127 b

Planet status	Confirmed
Planet type	Hot Jupiter
Period	4.178062 d
Mass	0.18 M_J 57.204 M⊕
Radius	1.37 R_J 15.344 R⊕
Semi major axis	0.052 AU
Star name	WASP-127
Star distance	159.507 pc
Star teff	5620 K
Star radius	1.39 R☉
Temperature (calculated)	1401 K
V	10.15 mag
J	9.092 mag
K	8.641 mag
Alternate names
Exoplanet Encyclopaedia

Molecules

H2O: Detection OH: No detection CO: Upper limit	G-B: High resolution IR	Searching for Molecular Signatures in 14 Transiting Exoplanets with SPIRou 2026, A. Masson, S. Vinatier et al.	Other several species are investigated but with no evidence
He: Upper limit	G-B: High resolution IR	HET/HPF observations of Helium in warm, hot, and ultra-hot Jupiters 2025, Jaume Orell-Miquel, Kyra Sampson et al.
Na: Upper limit	G-B: High resolution visible	The GAPS programme at TNG LXVI. A homogeneous search for Na i and its possible variability in ten gas giant exoplanets 2024, D. Sicilia, L. Malavolta et al.	Unclear origin of small, but 5σ, Na absorption signal from the combination of several transits
Rayleigh Scattering: Detection	G-B: Low resolution visible	Low-resolution Transit Spectroscopy of Three Hot Jupiters Using the 2m Himalayan Chandra Telescope 2024, Athira Unni, Thirupathi Sivarani et al.
Cloudy: Detection Featureless spectra: Detection	HST WFC3	The HUSTLE Program: The UV to Near-Infrared HST WFC3/UVIS G280 Transmission Spectrum of WASP-127b 2024, V. A. Boehm, N. K. Lewis et al.
H2O: Detection CO: Detection Molecular ratios: C/O, etc...: Detection	G-B: High resolution IR	IGRINS observations of WASP-127 b: H$_2$O, CO, and super-Solar atmospheric metallicity in the inflated sub-Saturn 2024, Krishna Kanumalla, Michael R. Line et al.
He: Upper limit	G-B: High resolution IR	Probing atmospheric escape through metastable He I triplet lines in 15 exoplanets observed with SPIRou 2024, A. Masson, S. Vinatier et al.
CO: Detection H2O: Detection	G-B: High resolution IR	CRIRES$^+$ transmission spectroscopy of WASP-127b. Detection of the resolved signatures of a supersonic equatorial jet and cool poles in a hot planet 2024, L. Nortmann, F. Lesjak et al.	The double peaked signal can be explained by a supersonic equatorial jet and muted signals at the poles
He: Upper limit	G-B: High resolution IR	Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou 2023, R. Allart, P. -B. Lemée-Joliecoeur et al.	3sigma upper limit of <0.48 % with SPIRou.
H2O: Detection OH: Detection CO: Upper limit CO2: Upper limit	G-B: High resolution IR	CO or no CO? Narrowing the CO abundance constraint and recovering the H2O detection in the atmosphere of WASP-127 b using SPIRou 2023, Anne Boucher, David Lafrenière et al.
H2O: Upper limit Na: Detection K: Upper limit Li: Upper limit H: Upper limit	G-B: High resolution visible	WASP-127b: a misaligned planet with a partly cloudy atmosphere and tenuous sodium signature seen by ESPRESSO 2020, Allart, R., Pino, L. et al.	The upper limit on water vapour in the visible is consistent with its detection at low-resolution in the infrared.
Na: No detection	G-B: High resolution visible	Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS). VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b 2020, Seidel, J. V., Lendl, M. et al.	Na detection is not significant, using transit observations with HARPS.
Na: Upper limit	G-B: High resolution visible	Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS). VI. Non-detection of sodium with HARPS on the bloated super-Neptune WASP-127b 2020, Seidel, J. V., Lendl, M. et al.	Upper limit: 0.594%, compatible with previous studies, updating the erroneous claim of a large signature in Zak+2019.
H2O: Detection FeH: Detection	HST WFC3	ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope 2020, Skaf, Nour, Bieger, Michelle Fabienne et al.	Best-fit retrievals includes FeH, but it might also be another absorber
He: Upper limit	G-B: High resolution IR	Search for helium in the upper atmosphere of the hot Jupiter WASP-127 b using Gemini/Phoenix 2020, Leonardo A. dos Santos, David Ehrenreich et al.	1 transit with Gemini/Phoenix, R=65 000. 90% confidence upper limit for excess absorption at 0.87% in a 0.75 Å passband.
Na: Detection K: Detection Li: Detection H2O: Upper limit	G-B: Low resolution visible	The GTC exoplanet transit spectroscopy survey. IX. Detection of haze, Na, K, and Li in the super-Neptune WASP-127b 2018, Chen, G., Pallé, E. et al.	Detection of haze, Na, K, and Li in the super-Neptune WASP-127b, with GTC and NOT
Rayleigh Scattering: Detection Na: Upper limit	G-B: Low resolution visible	Feature-rich transmission spectrum for WASP-127b. Cloud-free skies for the puffiest known super-Neptune? 2017, Palle, E., Chen, G. et al.