Astronomy:WASP-96b
_mres.png) Spectrum of WASP-96b, taken by the James Webb Space Telescope | |
| Discovery[1] | |
|---|---|
| Discovered by | Hellier et al. (WASP) |
| Discovery date | October 2013 |
| Transit | |
| Orbital characteristics[2] | |
| 0.0454±0.0013 astronomical unit|AU | |
| Eccentricity | <0.11 |
| Orbital period | 3.4252602(27) d |
| Inclination | 85.60°±0.20° |
| Semi-amplitude | 64.0+5.3 −4.8 m/s |
| Physical characteristics[2] | |
| Mean radius | 1.200±0.060 RJ |
| Mass | 0.490+0.049 −0.047 Jupiter mass |
| Mean density | 0.352+0.068 −0.059 g/cm3 |
| Physics | 1285 K[1] |
WASP-96b is a gas giant exoplanet. Its mass is 0.48 times that of Jupiter. It is 0.0453 AU from the class G star WASP-96, which it orbits every 3.4 days. It is about 1,140 light-years away from Earth, in the constellation Phoenix. It was discovered in 2013 by the Wide Angle Search for Planets (WASP).
WASP-96b orbits its Sun-like star WASP-96 every 3.4 Earth days at a distance just one-ninth of the distance between Mercury and the Sun.[3]
The hot-Jupiter exoplanet was found via the transiting method by Coel Hellier et.al. in 2013 as part of the WASP-South survey.[1]
Atmosphere
WASP-96b's spectrum was one of the images featured in the initial science release from the James Webb Space Telescope in July 2022.[4] The spectrum confirmed the presence of water, as well as providing evidence for "clouds and hazes" within the planet's atmosphere.[3] Prior to this discovery, WASP-96b was thought to be free of clouds.[5][6]
While the light curve released confirms properties of the planet that had already been determined from other observations – the existence, size, and orbit of the planet – the transmission spectrum revealed previously hidden details of the atmosphere: the unambiguous signature of water, indications of haze, and evidence of clouds that were suspected based on prior observations.[7]
A study in 2023 measured the abundance of certain chemical species in the atmosphere of WASP-96b as seen in the table below.[8] Models of the atmosphere with patchy clouds and hazes best describes the observations through the James Webb Space Telescope.[8]
| Chemical Species[8] | log(VMR)[8] | Concentration |
|---|---|---|
| Water vapor | -3.59+0.35−0.35 | 257 ppm |
| Carbon monoxide | -3.25+0.91−5.06 | 562 ppm |
| Carbon dioxide | -4.38+0.47−0.57 | 41.7 ppm |
| Sodium | -6.85+2.48−3.10 | 141 ppb |
| Potassium | -8.04+1.22−1.71 | 9.12 ppb |
See also
References
- ↑ 1.0 1.1 1.2 Hellier, Coel; Anderson, D. R.; Cameron, A. Collier; Delrez, L.; Gillon, M.; Jehin, E.; Lendl, M.; Maxted, P. F. L. et al. (2013), "Transiting hot Jupiters from WASP-South, Euler and TRAPPIST: WASP-95b to WASP-101b", Monthly Notices of the Royal Astronomical Society 440 (3): 1982–1992, doi:10.1093/mnras/stu410, Bibcode: 2014MNRAS.440.1982H
- ↑ 2.0 2.1 Bonomo, A. S. et al. (June 2017). "The GAPS Programme with HARPS-N at TNG. XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy & Astrophysics 602: A107. doi:10.1051/0004-6361/201629882. Bibcode: 2017A&A...602A.107B.
- ↑ 3.0 3.1 "NASA's Webb Reveals Steamy Atmosphere of Distant Planet in Detail". 11 July 2022. https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-reveals-steamy-atmosphere-of-distant-planet-in-detail.
- ↑ Cesari, Thaddeus (2022-07-11). "NASA Shares List of Cosmic Targets for Webb Telescope's First Images". NASA. https://www.nasa.gov/feature/goddard/2022/nasa-shares-list-of-cosmic-targets-for-webb-telescope-s-first-images.
- ↑ Jorgenson, Amber (2018-05-08). "WASP-96b: the cloudless exoplanet" (in en). https://astronomy.com/news/2018/05/the-cloudless-exoplanet.
- ↑ McGruder, Chima D.; López-Morales, Mercedes; Kirk, James; Espinoza, Néstor; Rackham, Benjamin V.; Alam, Munazza K.; Allen, Natalie; Nikolov, Nikolay et al. (2022), "ACCESS: Confirmation of a Clear Atmosphere for WASP-96b and a Comparison of Light Curve Detrending Techniques", The Astronomical Journal 164 (4): 134, doi:10.3847/1538-3881/ac7f2e, Bibcode: 2022AJ....164..134M
- ↑ Samra, D.; Helling, Ch.; Chubb, K. L.; Min, M.; Carone, L.; Schneider, A. D. (2023), "Clouds form on the hot Saturn JWST ERO target WASP-96b", Astronomy & Astrophysics 669: A142, doi:10.1051/0004-6361/202244939, Bibcode: 2023A&A...669A.142S
- ↑ 8.0 8.1 8.2 8.3 Taylor, Jake (May 2023). "Awesome SOSS: Atmospheric Characterisation of WASP-96 b using the JWST Early Release Observations". MNRAS 524: 817–834. doi:10.1093/mnras/stad1547. Bibcode: 2023MNRAS.524..817T.
External links
Coordinates: 
00h 04m 11.1s, −47° 21′ 38.3214″
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