ExoAtmospheres
IAC community database for exoplanet atmospheric observations
WASP-76 b
| Planet status | Confirmed |
|---|---|
| Planet type | UltraHot Jupiter |
| Period | 1.809886 d |
| Mass | 0.92 MJ 292.376 M⊕ |
| Radius | 1.83 RJ 20.496 R⊕ |
| Semi major axis | 0.033 AU |
| Star name | WASP-76 |
| Star distance | 195.3 pc |
| Star teff | 6250 K |
| Star radius | 1.73 R☉ |
| Temperature (calculated) | 2190 K |
| V | 9.5 mag |
| J | 8.541 mag |
| K | 8.243 mag |
| Alternate names | |
| Exoplanet Encyclopaedia |  |
Molecules
H2O: Detection CO: Detection
|
G-B: High resolution IR | Searching for Molecular Signatures in 14 Transiting Exoplanets with SPIRou2026, A. Masson, S. Vinatier et al. |
Other species were not detected |
Fe: Detection Ca: Detection Na: Detection
|
G-B: High resolution visible | The KPF SURFS-UP Survey I: Transmission Spectroscopy of WASP-76 b2025, Aaron Householder, Fei Dai et al. |
|
He: Detection
|
G-B: High resolution IR | HET/HPF observations of Helium in warm, hot, and ultra-hot Jupiters2025, Jaume Orell-Miquel, Kyra Sampson et al. |
|
CO: Detection Fe: Detection
|
G-B: High resolution IR | The GAPS Programme at TNG. LXIX.The Dayside of WASP-76b revealed by GIANO-B, HARPS-N and ESPRESSO: Evidence for Three-Dimensional Atmospheric Effects2025, G. Guilluy, P. Giacobbe et al. |
|
Na: Detection
|
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 exoplanets2024, D. Sicilia, L. Malavolta et al. |
Study of the strenght of the Na doublet lines from several transits |
Fe: Detection Fe+: No detection
|
G-B: High resolution visible | ESPRESSO reveals blueshifted neutral iron emission lines on the dayside of WASP-76 b2024, Costa Silva, A. R., Demangeon, O. D. S. et al. |
Dayside observations; emission spectroscopy; ESPRESSO. |
Albedo: 0.16 Phase curve: Yes Dayside Temperature (occultation): 2580 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. |
CO: Detection H2O: Detection HCN: Upper limit H2C2: Upper limit OH: Upper limit Molecular ratios: C/O, etc...: Detection Atmospheric dynamics: Detection
|
G-B: High resolution IR | Atmospherix. III. Estimating the C/O ratio and molecular dynamics at the limbs of WASP-76 b with SPIRou2024, Hood, Thea, Debras, Florian et al. |
Confirmation of an asymmetry in the dynamics and temperature/compositon of the limbs in the infrared |
He: Upper limit
|
G-B: High resolution IR | Probing atmospheric escape through metastable He I triplet lines in 15 exoplanets observed with SPIRou2024, A. Masson, S. Vinatier et al. |
Tentative detection |
H2O: Detection CO: Detection OH: Detection Molecular ratios: C/O, etc...: Detection
|
G-B: High resolution IR | The metallicity and carbon-to-oxygen ratio of the ultra-hot Jupiter WASP-76b from Gemini-S/IGRINS2024, Megan Weiner Mansfield, Michael R. Line et al. |
|
OH: Detection H2O: Detection Molecular ratios: C/O, etc...: Detection
|
G-B: High resolution IR | Revealing H$_2$O dissociation in WASP-76~b through combined high- and low-resolution transmission spectroscopy2024, Siddharth Gandhi, Rico Landman et al. |
Revealing H2O dissociation HST+High-res |
Molecular ratios: C/O, etc...: Detection Fe: Detection Mg: Detection VO: Detection
|
G-B: High resolution visible | High-resolution atmospheric retrievals of WASP-76b transmission spectroscopy with ESPRESSO: Monitoring limb asymmetries across multiple transits2024, Cathal Maguire, Neale P. Gibson et al. |
Found broad consistency between the limbs of the atmosphere for each of the transits |
Fe: Detection Na: Detection Ca+: Detection
|
G-B: High resolution visible | ExoGemS High-Resolution Transmission Spectroscopy of WASP-76b with GRACES2023, Emily K. Deibert, Ernst J. W. de Mooij et al. |
|
Fe: Detection Mg: Detection Ni: Detection Cr: Detection Mn: Detection V: Detection Ca: Detection Ti: Upper limit Na: Upper limit
|
G-B: High resolution visible | Retrieval Survey of Metals in Six Ultrahot Jupiters: Trends in Chemistry, Rain-out, Ionization, and Atmospheric Dynamics2023, Gandhi, Siddharth, Kesseli, Aurora et al. |
|
Fe: Detection Na: Detection Ca+: Detection Cr: Detection Li: Detection H: Detection V: Detection VO: Detection Mn: Detection Ni: Detection Mg: Detection Ca: Detection K: Detection Ba+: Detection
|
G-B: High resolution visible | Vanadium oxide and a sharp onset of cold-trapping on a giant exoplanet2023, Pelletier, Stefan, Benneke, Björn et al. |
|
CO: Detection
|
G-B: High resolution IR | CRIRES+ detection of CO emissions lines and temperature inversions on the dayside of WASP-18b and WASP-76b2023, F. Yan, L. Nortmann et al. |
|
Ba+: Detection
|
G-B: High resolution visible | Detection of barium in the atmospheres of the ultra-hot gas giants WASP-76b and WASP-121b2022, T. Azevedo Silva, O. D. S. Demangeon et al. |
|
Na: Detection
|
G-B: High resolution visible | A survey of sodium absorption in ten giant exoplanets with high-resolution transmission spectroscopy2022, Adam B. Langeveld, Nikku Madhusudhan et al. |
Confirms previously reported detection of Na using HARPS. |
H2O: Detection TiO: Detection
|
HST WFC3 | Five key exoplanet questions answered via the analysis of 25 hot Jupiter atmospheres in eclipse2022, Quentin Changeat, Billy Edwards et al. |
|
Fe: Detection Ca+: Detection Cr: Detection Li: Detection Mg: Detection Na: Detection Mn: Detection Sr+: Detection Ni: Detection V: Detection H: Upper limit K: Upper limit Co: Upper limit Ti: No detection
|
G-B: High resolution visible | An Atomic Spectral Survey of WASP-76b: Resolving Chemical Gradients and Asymmetries2022, Kesseli, Aurora Y., Snellen, I. A. G. et al. |
This reference is currently in the database but is not quite correct/complete (e.g., Sr instead of Sr+, etc.) |
HCN: Detection H2O: Detection
|
G-B: High resolution IR | Searching for the origin of the Ehrenreich effect in ultra-hot Jupiters: Evidence for strong C/O gradients in the atmosphere of WASP-76b?2022, A. Sánchez-López, R. Landman et al. |
|
Fe: Detection
|
G-B: High resolution visible | Spatially-resolving the terminator: Variation of Fe, temperature and winds in WASP-76 b across planetary limbs and orbital phase2022, Siddharth Gandhi, Aurora Kesseli et al. |
Spatially resolved observations |
Na: Detection
|
G-B: High resolution visible | Investigation of the upper atmosphere in ultra-hot Jupiter WASP-76 b with high-resolution spectroscopy2021, Kiyoe Kawauchi, Norio Narita et al. |
Na detection with Subaru/HDS |
OH: Detection
|
G-B: High resolution IR | Detection of OH in the ultra-hot Jupiter WASP-76b2021, Rico Landman, Alejandro Sànchez-López et al. |
|
Ca+: Detection Na: Detection
|
G-B: High resolution visible | Detection of Ionized Calcium in the Atmosphere of the Ultra-Hot Jupiter WASP-76b2021, Emily K. Deibert, Ernst J. W. de Mooij et al. |
|
Cloudy: Detection
|
G-B: High resolution visible | No umbrella needed: Confronting the hypothesis of iron rain on WASP-76b with post-processed general circulation models2021, Arjun B. Savel, Eliza M. -R. Kempton et al. |
Modeling work of previously published data. optically thick clouds composed of Al2O3, Fe, or Mg2SiO4 provide best fits |
Ca+: Detection He: Upper limit Na: Upper limit Li: Upper limit H: Upper limit K: Upper limit
|
G-B: High resolution IR | CARMENES detection of the CaII infrared triplet and possible evidence of HeI in the atmosphere of WASP-76b2021, N. Casasayas-Barris, J. Orell-Miquel et al. |
|
Na: Detection
|
G-B: High resolution visible | Into the Storm: Diving into the winds of the ultra hot Jupiter WASP-76 b with HARPS and ESPRESSO2021, J. V. Seidel, D. Ehrenreich et al. |
Re-analysis of HARPS & ESPRESSO data already published. Appendix showing line shape can only come from atmosphere. |
Phase curve: Yes |
Spitzer | Spitzer phase curve observations and circulation models of the inflated ultra-hot Jupiter WASP-76b2021, Erin M. May, Thaddeus D. Komacek et al. |
Ultra-hot day side and relatively cold nightside brightness temperatures found |
Fe: Detection
|
G-B: High resolution visible | Confirmation of Asymmetric Iron Absorption in WASP-76b with HARPS2021, Kesseli, Aurora Y.Snellen, I. A. G. |
Confirmation of Fe asymmetry from Ehrenreich+2020 |
Li: Detection Na: Detection Mg: Detection Ca+: Detection K: Detection Fe: Detection Ti: Upper limit Cr: Upper limit Ni: Upper limit TiO: Upper limit VO: Upper limit ZrO: Upper limit
|
G-B: High resolution visible | ESPRESSO high-resolution transmission spectroscopy of WASP-76 b2021, Tabernero, H. M., Zapatero Osorio, M. R. et al. |
|
FeH: Upper limit
|
G-B: High resolution IR | A Search for FeH in Hot-Jupiter Atmospheres with High-dispersion Spectroscopy2020, Kesseli, Aurora Y., Snellen, I. A. G. et al. |
|
TiO: Detection VO: Upper limit H2O: Detection
|
HST WFC3 | ARES I: WASP-76 b, A Tale of Two HST Spectra2020, Edwards, Billy, Changeat, Quentin et al. |
No evidence for TiO in transmission (upper limit), but TiO detected in emission. |
Fe+: Detection
|
G-B: High resolution visible | Nightside condensation of iron in an ultrahot giant exoplanet2020, Ehrenreich, David, Lovis, Christophe et al. |
Indirect detection of Fe+ condensation |
Na: Detection
|
G-B: High resolution visible | Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS). II. A broadened sodium feature on the ultra-hot giant WASP-76b2019, Seidel, J. V., Ehrenreich, D. et al. |
|
H2O: Detection
|
HST WFC3 | A Population Study of Gaseous Exoplanets2018, Tsiaras, A., Waldmann, I. P. et al. |
|
Mg+: Detection
|
HST STIS | Astro-ph arXiv:2610.09128 |