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WASP-80

Coordinates:Sky map20h12m40.1692s,−02° 08′ 39.1912″
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WASP-80 / Petra
Observation data
EpochJ2000EquinoxJ2000
Constellation Aquila
Right ascension 20h12m40.1692s[1]
Declination −02° 08′ 39.1912″[1]
Apparent magnitude(V) 11.939
Characteristics
Evolutionary stage Main sequence
Spectral type K7[citation needed]
Astrometry
Radial velocity(Rv)9.82±0.77[2]km/s
Proper motion(μ)RA:-132.913[2]mas/yr
Dec.:-50.683[2]mas/yr
Parallax(π)20.1141 ± 0.0207mas[2]
Distance162.2 ± 0.2ly
(49.72 ± 0.05pc)
Details
Mass0.614+0.014
−0.012[3]M☉
Radius0.586+0.017
−0.018[4]R☉
Surface gravity(logg)4.60±0.02[5]cgs
Temperature4066±22[5]K
Metallicity[Fe/H]0.13±0.11[6]dex
Rotation23.5±3[7]
Rotational velocity(vsini)5.04±0.19[5]km/s
Age1.352±0.222[7]Gyr
Other designations
Petra,Gaia DR24223507222112425344,TYC5165-481-1,GSC05165-00481,2MASSJ20124017-0208391[1]
Database references
SIMBADdata

WASP-80is aK-type main-sequence starabout 162 light-years away from Earth. The star's age is much younger than the Sun's at 1.352±0.222 billion years.[7]WASP-80 could be similar to the Sun in concentration of heavy elements, although this measurement is highly uncertain.[6]

The star was namedPetrain 2019 by Jordanian amateur astronomers as part of theNameExoWorldscontest.[8]

Three multiplicity surveys in 2015-2018 did not detect any stellar companions to WASP-80, but a survey in 2020 detected a 0.07M☉companion candidate at an angular separation 2.132±0.010 arcseconds, with a false alarm probability of 3%.[9]

Planetary system

[edit]

In 2013 atransitinghot Jupiterplanet WASP-80 b was detected on a tight, circular orbit.[10]The planet was namedWadirumby Jordanian astronomers in December 2019.[8]Its equilibrium temperature is825±19K,while measured temperature of the dayside is 937±48Kand temperature of the nightside is 851±14K.This temperature difference indicates a rather low planetary albedo and weak global transport of heat.[11]

Measurement of theRossiter–McLaughlin effectin 2015 revealed WASP-80b's is orbit is well-aligned with the equatorial plane of the star, with orbital obliquity equal to 14±14°.[4]

Although one transmission spectrum of the planetary atmosphere showed signs of ionisedpotassium,[12]another measurement in 2017 yielded a gray and featureless spectrum, probably due to a high cloud deck[13]or haze[14]in the atmosphere ofWASP-80b.[11]TheJames Webb Space Telescopehas characterized the atmospheric composition of WASP-80 b, detecting signs of water vapor and methane on the planet.[15]This discovery not only uncovers the exoplanet's origin and evolution but also fosters a comparative study bridging our solar system's gas giants and diverse exoplanets.[16]

The WASP-80 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b (Wadirum) 0.571±0.02[3]MJ 0.0344+0.0011
−0.0010[4] 		3.067852[4] 0[4] 89.02+0.11
−0.10[4]° 		1.0091+0.011
−0.0095[3]RJ

References

[edit]
  1. ^abc"WASP-80".SIMBAD.Centre de données astronomiques de Strasbourg.
  2. ^abcdBrown, A. G. A.;et al. (Gaia collaboration) (2021)."GaiaEarly Data Release 3: Summary of the contents and survey properties ".Astronomy & Astrophysics.649:A1.arXiv:2012.01533.Bibcode:2021A&A...649A...1G.doi:10.1051/0004-6361/202039657.S2CID227254300.(Erratum:doi:10.1051/0004-6361/202039657e).Gaia EDR3 record for this sourceatVizieR.
  3. ^abcWang, Xian-Yu; Wang, Yong-Hao; Wang, Songhu; Wu, Zhen-Yu; Rice, Malena; Zhou, Xu; Hinse, Tobias C.; Liu, Hui-Gen; Ma, Bo; Peng, Xiyan; Zhang, Hui; Yu, Cong; Zhou, Ji-Lin; Laughlin, Gregory (2021), "Transiting Exoplanet Monitoring Project (TEMP). VI. The Homogeneous Refinement of System Parameters for 39 Transiting Hot Jupiters with 127 New Light Curves",The Astrophysical Journal Supplement Series,255(1): 15,arXiv:2105.14851,Bibcode:2021ApJS..255...15W,doi:10.3847/1538-4365/ac0835,S2CID235253975
  4. ^abcdefTriaud, A. H. M. J.; Gillon, M.; Ehrenreich, D.; Herrero, E.; Lendl, M.; Anderson, D. R.; Collier Cameron, A.; Delrez, L.; Demory, B.-O.; Hellier, C.; Heng, K.; Jehin, E.; Maxted, P. F. L.; Pollacco, D.; Queloz, D.; Ribas, I.; Smalley, B.; Smith, A. M. S.; Udry, S. (2015), "WASP-80b has a dayside within the T-dwarf range",Monthly Notices of the Royal Astronomical Society,450(3): 2279–2290,arXiv:1503.08152,doi:10.1093/mnras/stv706
  5. ^abcGill, S.; Maxted, P. F. L.; Smalley, B. (2018), "The atmospheric parameters of FGK stars using wavelet analysis of CORALIE spectra",Astronomy & Astrophysics,612:A111,arXiv:1801.06106,Bibcode:2018A&A...612A.111G,doi:10.1051/0004-6361/201731954,S2CID119331772
  6. ^abWallack, Nicole L.; Knutson, Heather A.; Morley, Caroline V.; Moses, Julianne I.; Thomas, Nancy H.; Thorngren, Daniel P.; Deming, Drake; Désert, Jean-Michel; Fortney, Jonathan J.; Kammer, Joshua A. (2019), "Investigating Trends in Atmospheric Compositions of Cool Gas Giant Planets UsingSpitzerSecondaryEclipses ",The Astronomical Journal,158(6): 217,arXiv:1908.00014,Bibcode:2019AJ....158..217W,doi:10.3847/1538-3881/ab2a05,S2CID199064423
  7. ^abcGallet, F.; Gallet (2020), "TATOO: Tidal-chronology standalone tool to estimate the age of massive close-in planetary systems",Astronomy & Astrophysics,641:A38,arXiv:2006.07880,Bibcode:2020A&A...641A..38G,doi:10.1051/0004-6361/202038058,S2CID219687851
  8. ^ab"Star, its exoplanet named after Petra, Wadi Rum".Roya News.2019-12-17.Retrieved2021-04-04.
  9. ^Bohn, A. J.; Southworth, J.; Ginski, C.; Kenworthy, M. A.; Maxted, P. F. L.; Evans, D. F. (2020), "A multiplicity study of transiting exoplanet host stars",Astronomy & Astrophysics,635:A73,arXiv:2001.08224,Bibcode:2020A&A...635A..73B,doi:10.1051/0004-6361/201937127,S2CID210861118
  10. ^Triaud, A. H. M. J.; Anderson, D. R.; Collier Cameron, A.; Doyle, A. P.; Fumel, A.; Gillon, M.; Hellier, C.; Jehin, E.; Lendl, M.; Lovis, C.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Queloz, D.; Ségransan, D.; Smalley, B.; Smith, A. M. S.; Udry, S.; West, R. G.; Wheatley, P. J. (2013), "WASP-80b: A gas giant transiting a cool dwarf",Astronomy & Astrophysics,551:A80,arXiv:1303.0254,Bibcode:2013A&A...551A..80T,doi:10.1051/0004-6361/201220900,S2CID67805044
  11. ^abWong, Ian; Chachan, Yayaati; Knutson, Heather A.; Henry, Gregory W.; Adams, Danica; Kataria, Tiffany; Benneke, Björn; Gao, Peter; Deming, Drake; López-Morales, Mercedes; Sing, David K.; Alam, Munazza K.; Ballester, Gilda E.; Barstow, Joanna K.; Buchhave, Lars A.; Dos Santos, Leonardo A.; Fu, Guangwei; Muñoz, Antonio García; MacDonald, Ryan J.; Mikal-Evans, Thomas; Sanz-Forcada, Jorge; Wakeford, Hannah R. (2022), "The Hubble PanCET Program: A Featureless Transmission Spectrum for WASP-29b and Evidence of Enhanced Atmospheric Metallicity on WASP-80b",The Astronomical Journal,164(1): 30,arXiv:2205.10765,Bibcode:2022AJ....164...30W,doi:10.3847/1538-3881/ac7234,S2CID248987053
  12. ^Sedaghati, Elyar; Boffin, Henri M. J.; Delrez, Laetitia; Gillon, Michaël; Csizmadia, Szilard; Smith, Alexis M. S.; Rauer, Heike (2017), "Probing the atmosphere of a sub-Jovian planet orbiting a cool dwarf",Monthly Notices of the Royal Astronomical Society,468(3): 3123–3134,arXiv:1703.02630,doi:10.1093/mnras/stx646
  13. ^Parviainen, H.; Pallé, E.; Chen, G.; Nortmann, L.; Murgas, F.; Nowak, G.; Aigrain, S.; Booth, A.; Abazorius, M.; Iro, N. (2018), "The GTC exoplanet transit spectroscopy survey",Astronomy & Astrophysics,609:A33,arXiv:1709.01875,doi:10.1051/0004-6361/201731113,S2CID118890485
  14. ^Kirk, J.; Wheatley, P. J.; Louden, T.; Skillen, I.; King, G. W.; McCormac, J.; Irwin, P. G. J. (2018), "LRG-BEASTS III: Ground-based transmission spectrum of the gas giant orbiting the cool dwarf WASP-80",Monthly Notices of the Royal Astronomical Society,474:876–885,arXiv:1710.10083,doi:10.1093/mnras/stx2826
  15. ^"James Webb Telescope Reveals Methane in Exoplanet WASP-80 b's Atmosphere".www.jameswebbdiscovery.com.Retrieved2024-02-25.
  16. ^"James Webb Telescope Reveals Methane in Exoplanet WASP-80 b's Atmosphere".www.jameswebbdiscovery.com.Retrieved2024-02-25.
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