Astronomy:WASP-1

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Short description: Star in the constellation Andromeda
WASP-1
WASP-1.jpg
The star WASP-1.
Observation data
Equinox J2000.0]] (ICRS)
Constellation Andromeda[1]
Right ascension  00h 20m 40.077s[2]
Declination +31° 59′ 23.79″[2]
Apparent magnitude (V) 11.68 ± 0.05[3]
Characteristics
Spectral type F7V[4]
Apparent magnitude (B) ~12.0[5]
Apparent magnitude (V) 11.68 ± 0.05[3]
Astrometry
Proper motion (μ) RA: −4.706±0.078[2] mas/yr
Dec.: −3.237±0.072[2] mas/yr
Parallax (π)2.5171 ± 0.0676[2] mas
Distance1,300 ± 30 ly
(400 ± 10 pc)
Absolute magnitude (MV)3.63+0.13
−0.14[3]
Details[3]
Mass1.301+0.049
−0.047 M☉
Radius1.515+0.052
−0.045 R☉
Luminosity2.88+0.36
−0.30 L☉
Surface gravity (log g)4.190+0.020
−0.022 cgs
Temperature6110±75 K
Metallicity [Fe/H]0.26±0.08 dex
Age3.0±0.6 Gyr
Other designations
1SWASP J002040.07+315923.7, USNO-B1.0 1219-00005465, Gaia DR2 2862548428079638912, TYC 2265-107-1, GSC 02265-00107, 2MASS J00204007+3159239[5]
Database references
SIMBADdata

WASP-1 is a metal-rich magnitude 12 star located about 1,300 light-years away in the Andromeda constellation.[6]

Planetary system

In 2006, an extrasolar planet was discovered by the Wide Angle Search for Planets team using the transit method.[4] The planet has a density of 0.31 to 0.40 g/cm3, making it about half as dense as Saturn, and one third as dense as water. The orbit of WASP-1b is inclined to rotational axis of the star by 79.0+4.3−4.5 degrees, making it a nearly "polar" orbit.[7]

Two searches for additional planets using transit-timing variations have yielded negative results.[8][9]

The WASP-1 planetary system[10]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.948+0.029
−0.028 MJ 		0.03958+0.00047
−0.00049 		2.51994480±0.00000050 <0.013 90.0+0.0
−2.9° 		1.514+0.052
−0.047 RJ

See also

  • SuperWASP
  • 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 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 3.3 Torres, Guillermo; Winn, Joshua N.; Holman, Matthew J. (2008). "Improved Parameters for Extrasolar Transiting Planets". The Astrophysical Journal 677 (2): 1324–1342. doi:10.1086/529429. Bibcode: 2008ApJ...677.1324T. 
  4. ↑ 4.0 4.1 Cameron, A. Collier et al. (2007). "WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE". Monthly Notices of the Royal Astronomical Society 375 (3): 951–957. doi:10.1111/j.1365-2966.2006.11350.x. Bibcode: 2007MNRAS.375..951C. https://academic.oup.com/mnras/article/375/3/951/1139249. 
  5. ↑ 5.0 5.1 "TYC 2265-107-1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TYC+2265-107-1. 
  6. ↑ Stempels, H. C. et al. (2007). "WASP-1: a lithium- and metal-rich star with an oversized planet". Monthly Notices of the Royal Astronomical Society 379 (2): 773–778. doi:10.1111/j.1365-2966.2007.11976.x. Bibcode: 2007MNRAS.379..773S. https://academic.oup.com/mnras/article/379/2/773/1026310. 
  7. ↑ Simpson, E. K.; Pollacco, D.; Cameron, A. Collier; Hébrard, G.; Anderson, D. R.; Barros, S. C. C.; Boisse, I.; Bouchy, F. et al. (2011). "The spin-orbit angles of the transiting exoplanets WASP-1b, WASP-24b, WASP-38b and HAT-P-8b from Rossiter-Mc Laughlin observations★". Monthly Notices of the Royal Astronomical Society 414 (4): 3023–3035. doi:10.1111/j.1365-2966.2011.18603.x. Bibcode: 2011MNRAS.414.3023S. 
  8. ↑ Granata, V. et al. (2014). "TASTE IV: Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b". Astronomische Nachrichten 335 (8): 797–803. doi:10.1002/asna.201412072. Bibcode: 2014AN....335..797G. 
  9. ↑ Maciejewski, G. et al. (2014). "Revisiting Parameters for the WASP-1 Planetary System". Acta Astronomica 64 (1): 11–26. Bibcode: 2014AcA....64...27M. http://acta.astrouw.edu.pl/Vol64/n1/pdf/pap_64_1_3.pdf. 
  10. ↑ Bonomo, A. S. et al. (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 and Astrophysics 602: A107. doi:10.1051/0004-6361/201629882. Bibcode: 2017A&A...602A.107B. https://www.aanda.org/articles/aa/full_html/2017/06/aa29882-16/aa29882-16.html. 

External links

Coordinates: Sky map 00h 20m 40s, +31° 59′ 24″



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