ExoAtmospheres
IAC community database for exoplanet atmospheric observations
GJ 9827 d
| Planet status | Confirmed |
|---|---|
| Planet type | Warm Super-Earth |
| Period | 6.20183 d |
| Mass | 0.0108 MJ 3.43224 M⊕ |
| Radius | 0.1744 RJ 1.95328 R⊕ |
| Semi major axis | 0.0555 AU |
| Star name | GJ 9827 |
| Star distance | 30.3 pc |
| Star teff | 4255 K |
| Star radius | 0.651 R☉ |
| Temperature (calculated) | 604 K |
| V | 10.4 mag |
| J | 7.984 mag |
| K | 7.193 mag |
| Alternate names | K2-135 d |
| Exoplanet Encyclopaedia |  |
Molecules
H2O: Detection He: Upper limit Molecular ratios: C/O, etc...: Detection
|
JWST-NIRISS | JWST/NIRISS reveals the water-rich "steam world" atmosphere of GJ 9827 d2024, Caroline Piaulet-Ghorayeb, Bjorn Benneke et al. |
"Water world " atmosphere inferred |
H2O: Detection
|
HST WFC3 | Water absorption in the transmission spectrum of the water-world candidate GJ9827d2023, Pierre-Alexis Roy, Björn Benneke et al. |
|
He: Upper limit
|
G-B: High resolution IR | Absence of extended atmospheres in low-mass star radius-gap planets GJ 9827 b, GJ 9827 d and TOI-1235 b2023, Vigneshwaran Krishnamurthy, Teruyuki Hirano et al. |
|
H: No detection He: No detection
|
G-B: High resolution IR | A multi-wavelength look at the GJ 9827 system -- No evidence of extended atmospheres in GJ 9827 b and d from HST and CARMENES data2021, Ilaria Carleo, Allison Youngblood et al. |
Non detections of Ly-a, Ha and He. No evidence for an extended H/He upper atmosphere with HST and CARMENES observations. |
He: No detection
|
G-B:Low resolution IR | Nondetection of Helium in the Upper Atmospheres of Three Sub-Neptune Exoplanets2020, Kasper, David, Bean, Jacob L. et al. |
Non detection above the noise level using Keck/NIRSPEC with a resolving power of R = 25000 |