Astronomy:WASP-19

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Short description: Star in the constellation Vela
WASP-19 / Wattle
Observation data
Equinox J2000.0]] (ICRS)
Constellation Vela[1]
Right ascension  09h 53m 40.07656s[2]
Declination −45° 39′ 33.0572″[2]
Apparent magnitude (V) 12.312 ± 0.017[3]
Characteristics
Spectral type G8V
Apparent magnitude (B) 13.58
Apparent magnitude (R) 12.17
Apparent magnitude (I) 11.35
Apparent magnitude (J) 10.911 ± 0.026[4]
Apparent magnitude (H) 10.602 ± 0.022[4]
Apparent magnitude (K) 10.481 ± 0.023[4]
B−V color index 1.3
V−R color index 0.1
R−I color index 0.82
Variable type planetary transit
Astrometry
Radial velocity (Rv)21.41±0.95[2] km/s
Proper motion (μ) RA: −35.457[2] mas/yr
Dec.: 17.378[2] mas/yr
Parallax (π)3.7516 ± 0.0090[2] mas
Distance869 ± 2 ly
(266.6 ± 0.6 pc)
Absolute magnitude (MV)5.3
Details[5]
Radius0.885+0.086−0.084 R☉
Luminosity0.71 L☉
Surface gravity (log g)4.45 ± 0.05[6] cgs
Temperature5568 ± 71[6] K
Metallicity [Fe/H]0.15 ± 0.07[6] dex
Rotation11.76±0.09 d
Rotational velocity (v sin i)4.0 ± 1.0[6] km/s
Age9.95±2.49 Gyr
Other designations
Wattle, GSC 08181-01711, 2MASS J09534008-4539330, USNO-B1.0 0443-00193111
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

WASP-19, formally named Wattle,[7] is a magnitude 12.3 star about 869 light-years (266 parsecs) away, located in the Vela constellation of the southern hemisphere.[8] This star has been found to host a transiting hot Jupiter-type planet in tight orbit.

WASP-19 is older than the Sun, has a fraction of heavy elements above the solar abundance, and is rotating rapidly, being spun up by the tides raised by the giant planet on a close orbit.[5]

Nomenclature

The designation WASP-19 indicates that this was the 19th star found to have a planet by the Wide Angle Search for Planets.

In August 2022, this planetary system was included among 20 systems to be named by the third NameExoWorlds project.[9] The approved names were proposed by a team from Brandon Park Primary School in Wheelers Hill (Melbourne, Australia ), led by scientist Lance Kelly and teacher David Maierhofer [10] and announced in June 2023. WASP-19 is named "Wattle" and its planet is named "Banksia", after the plant genera Wattle (specifically the golden wattle Acacia pycnantha) and Banksia (specifically the scarlet banksia Banksia coccinea) respectively.[7]

Planetary system

In December 2009, the SuperWASP project announced that a hot Jupiter type exoplanet, WASP-19b, was orbiting very close to this star and with the shortest orbital period of any transiting exoplanet known at the time.[8]

The WASP-19 planetary system[11][12]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Banksia 1.168±0.023 MJ 0.01634 ± 0.00019 0.7888396 ± 0.00000010 0 78.76 ± 0.13° 1.18±0.12 RJ

See also

  • List of extrasolar planets

References

  1. ↑ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific 99 (617): 695–699. doi:10.1086/132034. Bibcode: 1987PASP...99..695R.  Vizier query form
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ Maxted, P. F. L. et al. (2011). "UBV(RI)C photometry of transiting planet hosting stars". Monthly Notices of the Royal Astronomical Society 418 (2): 1039–1042. doi:10.1111/j.1365-2966.2011.19554.x. Bibcode: 2011MNRAS.418.1039M. 
  4. ↑ 4.0 4.1 4.2 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. https://ui.adsabs.harvard.edu/abs/2006AJ....131.1163S/abstract.  Vizier catalog entry
  5. ↑ 5.0 5.1 Maxted, P. F. L.; Serenelli, A. M.; Southworth, J. (2015), "A comparison of gyrochronological and isochronal age estimates for transiting exoplanet host stars", Astronomy & Astrophysics 577: A90, doi:10.1051/0004-6361/201525774, Bibcode: 2015A&A...577A..90M 
  6. ↑ 6.0 6.1 6.2 6.3 Torres, Guillermo et al. (2012). "Improved Spectroscopic Parameters for Transiting Planet Hosts". The Astrophysical Journal 757 (2): 161. doi:10.1088/0004-637X/757/2/161. Bibcode: 2012ApJ...757..161T. 
  7. ↑ 7.0 7.1 "2022 Approved Names". IAU. https://www.nameexoworlds.iau.org/2022approved-names. 
  8. ↑ 8.0 8.1 Hebb, L. et al. (2010). "WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered". The Astrophysical Journal 708 (1): 224–231. doi:10.1088/0004-637X/708/1/224. Bibcode: 2010ApJ...708..224H. 
  9. ↑ "List of ExoWorlds 2022". IAU. 8 August 2022. https://www.nameexoworlds.iau.org/2022exoworlds. 
  10. ↑ https://www.facebook.com/pages/DrBradTucker/100063510852713
  11. ↑ Mancini, L. et al. (2013). "Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry". Monthly Notices of the Royal Astronomical Society 436 (1): 2–18. doi:10.1093/mnras/stt1394. Bibcode: 2013MNRAS.436....2M. 
  12. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Dragomir2011

Coordinates: Sky map 09h 53m 40.07s, −45° 39′ 33.06″



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