WASP-12

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WASP-12
WASP-12b (NASA).jpg
Artist's conception of WASP-12 & WASP-12b
Observation data
Epoch J2000.0       Equinox J2000.0
Constellation Auriga [1]
Right ascension 06h 30m 32.7966s [2]
Declination +29° 40′ 20.264″ [2]
Apparent magnitude  (V)11.560±0.068 [3]
Characteristics
Spectral type G0V [4] + M3V + M3V [5]
Apparent magnitude  (B)12.138±0.019 [3]
Apparent magnitude  (R)~11.6 [6]
Apparent magnitude  (J)10.477±0.021 [7]
Apparent magnitude  (H)10.228±0.022 [7]
Apparent magnitude  (K)10.188±0.020 [7]
Astrometry
Radial velocity (Rv)20.62±1.44 [2] km/s
Proper motion (μ)RA: −1.519(19) mas/yr [2]
Dec.: −6.761(15) mas/yr [2]
Parallax (π)2.4213±0.0166  mas [2]
Distance 1,347 ± 9  ly
(413 ± 3  pc)
Details
A
Mass 1.325+0.026
−0.018 [8]   M☉
Radius 1.690+0.019
−0.018 [8]   R☉
Luminosity 4.05+0.54
−0.53 [9]   L☉
Surface gravity (log g)4.11±0.11 [8]   cgs
Temperature 6265±50 [8]   K
Metallicity [Fe/H]+0.12±0.07 [8]   dex
Rotational velocity (v sin i)<1.9 [8]  km/s
Age 3.05±0.32 [8]   Gyr
Other designations
TOI-1725, TIC 86396382, WASP-12, TYC 1891-1178-1, 2MASS J06303279+2940202, UCAC2 42216354 [6]
Database references
SIMBAD A
BC
Exoplanet Archive data

WASP-12 is a magnitude 11 yellow dwarf star located approximately 1347 light-years away [2] in the constellation Auriga. [6] WASP-12 has a mass and radius similar to the Sun and is known for being orbited by a planet that is extremely hot and has a retrograde orbit around WASP-12. WASP-12 forms a triple star system with two red dwarf companions. Both of them have spectral types of M3V and are only 38% and 37% as massive as the Sun, respectively. [5]

Contents

Planetary system

In 2008, the exoplanet WASP-12b was discovered orbiting WASP-12 by SuperWASP, using the transit method. It is a hot Jupiter completing an orbit around its star in just one day. [10] Its high carbon-to-oxygen ratio indicates that rocky planets might have formed in the star system, and it may be a carbon planet. [11] It is subject to intensive photo-evaporation, and may be completely destroyed within one billion years from now. [12]

In 2015, no indications of additional planets were found in the WASP-12 system. [9]

The WASP-12 planetary system [13]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.465±0.079  MJ 0.0232±0.000641.09142030(14) [9] <0.02 [14] 83.52±0.03 ° 1.937±0.056  RJ

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a constellation from a position". Publications of the Astronomical Society of the Pacific . 99 (617): 695. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Constellation record for this object at VizieR.
  2. 1 2 3 4 5 6 7 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally Published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry
  4. ↑ Bergfors, C.; Brandner, W.; Daemgen, S.; Biller, B.; Hippler, S.; Janson, M.; Kudryavtseva, N.; Geißler, K.; Henning, T.; Köhler, R. (2013). "Stellar companions to exoplanet host stars: Lucky Imaging of transiting planet hosts". Monthly Notices of the Royal Astronomical Society. 428 (1): 182. arXiv: 1209.4087 . Bibcode:2013MNRAS.428..182B. doi: 10.1093/mnras/sts019 .
  5. 1 2 Bechter, Eric B.; Crepp, Justin R.; Ngo, Henry; Knutson, Heather A.; Batygin, Konstantin; Hinkley, Sasha; Muirhead, Philip S.; Johnson, John Asher; Howard, Andrew W.; Montet, Benjamin T.; Matthews, Christopher T.; Morton, Timothy D. (2014). "WASP-12b and HAT-P-8b are Members of Triple Star Systems". The Astrophysical Journal. 788 (1): 2. arXiv: 1307.6857 . Bibcode:2014ApJ...788....2B. doi:10.1088/0004-637X/788/1/2.
  6. 1 2 3 "SIMBAD query result: WASP-12 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-04-24.
  7. 1 2 3 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi: 10.1086/498708 . ISSN   0004-6256. S2CID   18913331. Vizier catalog entry
  8. 1 2 3 4 5 6 7 Leonardi, P.; Nascimbeni, V.; et al. (June 2024). "TASTE. V. A new ground-based investigation of orbital decay in the ultra-hot Jupiter WASP-12b". Astronomy & Astrophysics . 686: A84. arXiv: 2402.12120 . Bibcode:2024A&A...686A..84L. doi:10.1051/0004-6361/202348363.
  9. 1 2 3 Collins, Karen A.; Kielkopf, John F.; Stassun, Keivan G. (2017). "Transit Timing Variation Measurements of WASP-12b and Qatar-1b: No Evidence of Additional Planets". The Astronomical Journal. 153 (2): 78. arXiv: 1512.00464 . Bibcode:2017AJ....153...78C. doi: 10.3847/1538-3881/153/2/78 .
  10. ↑ Hebb, L.; et al. (2009-03-10). "WASP-12b: The Hottest Transiting Extrasolar Planet Yet Discovered". The Astrophysical Journal. 693 (2): 1920–1928. arXiv: 0812.3240 . Bibcode: 2009ApJ...693.1920H . doi: 10.1088/0004-637X/693/2/1920 .
  11. ↑ Madhusudhan, Nikku; Harrington, Joseph; Stevenson, Kevin B.; Nymeyer, Sarah; Campo, Christopher J.; Wheatley, Peter J.; Deming, Drake; Blecic, Jasmina; et al. (December 8, 2010). "A high C/O ratio and weak thermal inversion in the atmosphere of exoplanet WASP-12b". Nature . 469 (7328): 64–7. arXiv: 1012.1603 . Bibcode:2011Natur.469...64M. doi:10.1038/nature09602. PMID   21150901. S2CID   4415171..
  12. ↑ Ehrenreich, D.; Désert, J. -M. (2011). "Mass-loss rates for transiting exoplanets". Astronomy and Astrophysics. 529: A136. arXiv: 1103.0011 . Bibcode:2011A&A...529A.136E. doi:10.1051/0004-6361/201016356.
  13. ↑ Chakrabarty, Aritra; Sengupta, Sujan (July 2019). "Precise Photometric Transit Follow-up Observations of Five Close-in Exoplanets: Update on Their Physical Properties". The Astronomical Journal . 158 (1): 39. arXiv: 1905.11258 . Bibcode:2019AJ....158...39C. doi: 10.3847/1538-3881/ab24dd .
  14. ↑ Bonomo, A. S.; Desidera, 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. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID   118923163.
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