WASP-79b
Exoplanet From Wikipedia, the free encyclopedia
WASP-79b, also known as Pollera, is an extrasolar planet orbiting the star WASP-79 (Montuno). This planet is in the constellation Eridanus, and is about 810 light-years from Earth.
| 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] |
| 3.662366±0.0000085[1] d | |
| Inclination | 83.3±0.5°[1] |
| Star | WASP-79 |
| Physical characteristics | |
| 2.09±0.14[1] RJ | |
| Mass | 0.90±0.08[1] MJ |
| Temperature | 1900±50[1] K |
The name, Pollera, 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 RJ (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
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