Astronomy:WASP-79b
| Discovery | |
|---|---|
| Discovered by | Smalley et al.[1] |
| Discovery date | June 1 2012[1] |
| Transit method[1] | |
| Orbital characteristics | |
| 0.0535±0.0008 AU | |
| Eccentricity | 0[1] |
| Orbital period | 3.662366±0.0000085[1] d |
| Inclination | 83.3±0.5°[1] |
| Star | WASP-79 |
| Physical characteristics | |
| Mean radius | 2.09±0.14[1] |♃|J}}}}}} |
| Mass | 0.90±0.08[1] |♃|J}}}}}} |
| Physics | 1900±50[1] K |
WASP-79b, also known as Pollera, is an extrasolar planet orbiting the star CD-30 1812. This planet is in the constellation Eridanus, and is about 810 light-years from Earth.
The planet WASP-79b is named Pollera. The name was selected in the NameExoWorlds campaign by Panama, during the 100th anniversary of the IAU. A pollera is the traditional costume the woman wears in the El Punto, a Panamanian dance.[2][3]
Host star
WASP-79, or CD-30 1812, is a F-type dwarf star located at 240 parsecs (810 light years) away from Earth. With 1.38 M☉ and 1.53 R☉, it is both larger and more massive than the Sun. Its effective temperature is 6,600 K, making it hotter than the Sun.[1]
The star WASP-79 is named Montuno. Montuno is the traditional costume the man wears in the “El Punto”, a Panamanian dance.[2]
Characteristics
WASP-79b is a very large hot jupiter that is among the largest exoplanets discovered although its size is uncertain. It is most likely to be larger at 2.09 ± 0.14 |♃|J}}}}}} (approximately 300,000 kilometers across) with a temperature of 1,900 ± 50 K. However, it could be as small as 1.7 ± 0.11 RJ (approximately 240,000 kilometers across), which is comparable to the size of another hot jupiter WASP-78b, with a temperature at 1,770 ± 50 K. Despite being larger than Jupiter, it is slightly less massive.[1]
The planet is orbiting the host star at nearly-polar orbit with respect to star's equatorial plane, inclination being equal to −95.2+0.9−1.0°.[4]
In 2019 and 2020, the transmission spectra of WASP-79b were taken utilizing HST and Spitzer Space Telescope, with best fit being the hazy atmosphere containing about 1% water[5] and traces of Iron(I) hydride.[6][7] The presence of iron hydride was confirmed in 2021, along with tentative detection of vanadium oxide.[8] Also, in 2022 an atmospheric sodium has been detected.[9]
See also
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Smalley, B; Anderson, D. R; Collier-Cameron, A; Doyle, A. P; Fumel, A; Gillon, M; Hellier, C; Jehin, E et al. (2012). "WASP-78b and WASP-79b: Two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus". Astronomy & Astrophysics 547: A61. doi:10.1051/0004-6361/201219731. Bibcode: 2012A&A...547A..61S.
- ↑ 2.0 2.1 "Approved names" (in en). http://www.nameexoworlds.iau.org/final-results.
- ↑ "International Astronomical Union | IAU". https://www.iau.org/news/pressreleases/detail/iau1912/.
- ↑ Brown, D. J. A.; Triaud, A. H. M. J.; Doyle, A. P.; Gillon, M.; Lendl, M.; Anderson, D. R.; Collier Cameron, A.; Hébrard, G. et al. (2016), "Rossiter–Mc Laughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems", Monthly Notices of the Royal Astronomical Society 464: 810–839, doi:10.1093/mnras/stw2316
- ↑ Rathcke, Alexander D.; MacDonald, Ryan J.; Barstow, Joanna K.; Goyal, Jayesh M.; Lopez-Morales, Mercedes; Mendonça, João M.; Sanz-Forcada, Jorge; Henry, Gregory W. et al. (2021), "HST PanCET Program: A Complete Near-UV to Infrared Transmission Spectrum for the Hot Jupiter WASP-79b", The Astronomical Journal 162 (4): 138, doi:10.3847/1538-3881/ac0e99, Bibcode: 2021AJ....162..138R
- ↑ Smalley, B.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Hellier, C.; Jehin, E. et al. (2019). "Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 μm". The Astronomical Journal 159: 5. doi:10.3847/1538-3881/ab5442.
- ↑ Skaf, Nour; Michelle Fabienne Bieger; Edwards, Billy; Changeat, Quentin; Morvan, Mario; Kiefer, Flavien; Blain, Doriann; Zingales, Tiziano et al. (2020). "ARES. II. Characterizing the Hot Jupiters WASP-127 b, WASP-79 b, and WASP-62b with the Hubble Space Telescope". The Astronomical Journal 160 (3): 109. doi:10.3847/1538-3881/ab94a3. Bibcode: 2020AJ....160..109S.
- ↑ Foote, Trevor O.; Lewis, Nikole K.; Kilpatrick, Brian M.; Goyal, Jayesh M.; Bruno, Giovanni; Wakeford, Hannah R.; Robbins-Blanch, Nina; Kataria, Tiffany et al. (2022), "The Emission Spectrum of the Hot Jupiter WASP-79b from HST/WFC3", The Astronomical Journal 163 (1): 7, doi:10.3847/1538-3881/ac2f4a, Bibcode: 2022AJ....163....7F
- ↑ Langeveld, Adam B.; Madhusudhan, Nikku; Cabot, Samuel H C. (2022), "A survey of sodium absorption in 10 giant exoplanets with high-resolution transmission spectroscopy", Monthly Notices of the Royal Astronomical Society 514 (4): 5192–5213, doi:10.1093/mnras/stac1539
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