ExoAtmospheres
IAC community database for exoplanet atmospheric observations
WASP-77 A b
| Planet status | Confirmed |
|---|---|
| Planet type | Hot Jupiter |
| Period | 1.3600309 d |
| Mass | 1.76 MJ 559.328 M⊕ |
| Radius | 1.21 RJ 13.552 R⊕ |
| Semi major axis | 0.024 AU |
| Star name | WASP-77A |
| Star distance | 105.166 pc |
| Star teff | 5500 K |
| Star radius | 0.955 R☉ |
| Temperature (calculated) | 1715 K |
| V | 11.29 mag |
| J | 8.766 mag |
| K | 8.405 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
Molecular ratios: C/O, etc...: Detection
|
HST WFC3 | Re-analysis of 10 Hot-Jupiter Atmospheres with disequilibrium chemistry retrieval2025, Deborah Bardet, Quentin Changeat et al. |
|
Phase curve: Yes Dayside Temperature (occultation): 1876 K |
Spitzer | An Analysis of Spitzer Phase Curves for WASP-121b and WASP-77Ab2025, Brian Davenport, Thomas Kennedy et al. |
Phase curves at 3.6um and 4.5um |
H: Upper limit Ca+: Upper limit
|
G-B: High resolution visible | The Terminator Region Atmosphere of the hot Jupiter WASP-77Ab with ESPRESSO/VLT observations2024, Zewen Jiang, Wei Wang et al. |
|
Albedo: 0.35 Phase curve: Yes Dayside Temperature (occultation): 1820 K |
Spitzer | A Comprehensive Analysis Spitzer 4.5 $μ$m Phase Curve of Hot Jupiters2024, Lisa Dang, Taylor J. Bell et al. |
Dayside and nightside temperatures from phase curve at 4.5 um. |
Na: Upper limit H: Upper limit
|
G-B: High resolution visible | Stellar obliquity measurements of six gas giants2024, J. Zak, A. Bocchieri et al. |
Featureless spectra around the Na doublet and Halpha |
H2O: Detection CO: Detection TiO: Detection Molecular ratios: C/O, etc...: Detection
|
HST WFC3 | Measuring Tracers of Planet Formation in the Atmosphere of WASP-77A b: Sub-stellar O/H and C/H ratios, with a stellar C/O ratio and a potentially Super-stellar Ti/H ratio2024, Billy EdwardsQuentin Changeat |
Also JWST observations |
CO: Detection H2O: Detection Molecular ratios: C/O, etc...: Detection
|
JWST-NIRSpec | A Combined Ground-based and JWST Atmospheric Retrieval Analysis: Both IGRINS and NIRSpec Agree The Atmosphere of WASP-77A b is Metal-Poor2023, Peter Smith, Michael Line et al. |
Also ground-based high-res data from IGRINS |
Molecular ratios: C/O, etc...: Detection
|
JWST-NIRSpec | Confirmation of sub-solar metallicity for WASP-77Ab from JWST thermal emission spectroscopy2023, Prune C. August, Jacob L. Bean et al. |
|
H2O: Detection TiO: Detection CO2: Detection CH4: Detection
|
HST WFC3 | Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse2022, Quentin Changeat, Billy Edwards et al. |
|
H2O: Detection
|
HST WFC3 | Confirmation of Water Absorption in the Thermal Emission Spectrum of the Hot Jupiter WASP-77Ab with HST/WFC32022, Megan Mansfield, Lindsey Wiser et al. |
HST/WFC3 + Spitzer emission spectrum |
CO: Detection H2O: Detection C: Detection O: Detection
|
G-B: High resolution IR | A solar C/O and sub-solar metallicity in a hot Jupiter atmosphere2021, Michael R. Line, Matteo Brogi et al. |
Same values for star |