WASP-79b

Last updated
WASP-79b / Pollera
Discovery
Discovered by Smalley et al. [1]
Discovery dateJune 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
Mean radius
2.09±0.14 [1] RJ
Mass 0.90±0.08 [1] MJ
Temperature 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.

    Contents

    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  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

    Related Research Articles

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    WASP-78, is a single F-type main-sequence star about 2500 light-years away. It is likely to be younger than the Sun at 3.4+1.5
    −0.8     billion years. WASP-78 is depleted in heavy elements, having a 45% concentration of iron compared to the Sun.

    BD-07 436, also known as WASP-77 since 2012, is a binary star system about 344 light-years away. The star's components appears to have a different age, with the secondary older than 9 billion years, while the primary's age is 5 billion years. The BD-07 436 system's concentration of heavy elements is similar to the Sun. Its stars display moderate chromospheric activity, including x-ray flares.

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    BD+00 316, also known as WASP-71 since 2019, is an F-class main sequence star about 1200 light-years away. The star is younger than the Sun at approximately 3.6 billion years, yet is already close to leaving the main sequence. BD+00 316 is enriched in heavy elements, having 140% of the solar abundance of iron.

    WASP-62 is a single star about 575 light-years away. It is an F class main-sequence star, orbited by a planet, WASP-62b. The age of WASP-62 is much younger than the Sun at 0.8±0.6 billion years, and it has a metal abundance similar to the Sun. WASP-62 was named Naledi in 2019.

    WASP-61 is a single F-type main-sequence star about 1560 light-years away. The star age is much likely younger than the Sun's at approximately 3.8+1.8
    −0.9     billion years. WASP-61 is depleted in heavy elements, having just 40% of the solar abundance of iron.

    WASP-84, also known as BD+02 2056, is a G-type main-sequence star 327 light-years away in the constellation Hydra. Its surface temperature is 5350±31 K, and is slightly enriched in heavy elements compared to the Sun, with a metallicity Fe/H index of 0.05±0.02. It is rich in carbon and depleted of oxygen. WASP-84's age is probably older than the Sun at 8.5+4.1
    −5.5     billion years. The star appears to have an anomalously small radius, which can be explained by the unusually high helium fraction or by it being very young.

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    <span class="mw-page-title-main">WASP-96b</span> Gas giant exoplanet targeted for spectroscopy

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    WASP-96 is a G8-type star, located approximately 1150 light-years from Earth in the constellation of Phoenix.

    WASP-103b is an gaseous exoplanet, more specifically a hot Jupiter, located in the Hercules constellation orbiting the star WASP-103. It has an oval shape, similar to that of a rugby ball, thanks to the force of gravity exerted by its star. It is the first exoplanet to have a deformation detected.

    References

    1. 1 2 3 4 5 6 7 8 9 10 11 Smalley, B; Anderson, D. R; Collier-Cameron, A; Doyle, A. P; Fumel, A; Gillon, M; Hellier, C; Jehin, E; Lendl, M; Maxted, P. F. L; Pepe, F; Pollacco, D; Queloz, D; Ségransan, D; Smith, A. M. S; Southworth, J; Triaud, A. H. M. J; Udry, S; West, R. G (2012). "WASP-78b and WASP-79b: Two highly-bloated hot Jupiter-mass exoplanets orbiting F-type stars in Eridanus". Astronomy & Astrophysics. 547: A61. arXiv: 1206.1177 . Bibcode:2012A&A...547A..61S. doi:10.1051/0004-6361/201219731. S2CID   119233646.
    2. 1 2 "Approved names". NameExoworlds. Retrieved 2020-01-02.
    3. ↑ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
    4. ↑ Brown, D. J. A.; Triaud, A. H. M. J.; Doyle, A. P.; Gillon, M.; Lendl, M.; Anderson, D. R.; Collier Cameron, A.; Hébrard, G.; Hellier, C.; Lovis, C.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Smalley, B. (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, arXiv: 1610.00600 , doi:10.1093/mnras/stw2316
    5. ↑ Rathcke, Alexander D.; MacDonald, Ryan J.; Barstow, Joanna K.; Goyal, Jayesh M.; Lopez-Morales, Mercedes; Mendonça, João M.; Sanz-Forcada, Jorge; Henry, Gregory W.; Sing, David K.; Alam, Munazza K.; Lewis, Nikole K.; Chubb, Katy L.; Taylor, Jake; Nikolov, Nikolay; Buchhave, Lars A. (2021), "HST PanCET Program: A Complete Near-UV to Infrared Transmission Spectrum for the Hot Jupiter WASP-79b", The Astronomical Journal, 162 (4): 138, arXiv: 2104.10688 , Bibcode:2021AJ....162..138R, doi: 10.3847/1538-3881/ac0e99 , S2CID   233347193
    6. ↑ Smalley, B.; Anderson, D. R.; Collier-Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Segransan, D.; Smith, A. M. S.; Southworth, J.; Triaud, A. H. M. J.; Udry, S.; West, R. G.; Rathcke, Alexander D.; Sanz-Forcada, Jorge (2019). "Transmission Spectroscopy of WASP-79b from 0.6 to 5.0 μm". The Astronomical Journal. 159: 5. arXiv: 1911.02051 . doi: 10.3847/1538-3881/ab5442 . S2CID   207880528.
    7. ↑ Skaf, Nour; Michelle Fabienne Bieger; Edwards, Billy; Changeat, Quentin; Morvan, Mario; Kiefer, Flavien; Blain, Doriann; Zingales, Tiziano; Poveda, Mathilde; Al-Refaie, Ahmed; Baeyens, Robin; Gressier, Amelie; Guilluy, Gloria; Adam Yassin Jaziri; Modirrousta-Galian, Darius; Mugnai, Lorenzo V.; Pluriel, William; Whiteford, Niall; Wright, Sam; Kai Hou Yip; Charnay, Benjamin; Leconte, Jeremy; Drossart, Pierre; Tsiaras, Angelos; Venot, Olivia; Waldmann, Ingo; Beaulieu, Jean-Philippe (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. arXiv: 2005.09615 . Bibcode:2020AJ....160..109S. doi: 10.3847/1538-3881/ab94a3 . S2CID   218684714.
    8. ↑ Foote, Trevor O.; Lewis, Nikole K.; Kilpatrick, Brian M.; Goyal, Jayesh M.; Bruno, Giovanni; Wakeford, Hannah R.; Robbins-Blanch, Nina; Kataria, Tiffany; MacDonald, Ryan J.; López-Morales, Mercedes; Sing, David K.; Mikal-Evans, Thomas; Bourrier, Vincent; Henry, Gregory; Buchhave, Lars A. (2022), "The Emission Spectrum of the Hot Jupiter WASP-79b from HST/WFC3", The Astronomical Journal, 163 (1): 7, arXiv: 2107.14334 , Bibcode:2022AJ....163....7F, doi: 10.3847/1538-3881/ac2f4a , S2CID   236635028
    9. ↑ 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, arXiv: 2205.01623 , doi:10.1093/mnras/stac1539
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