WASP-1

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WASP-1
WASP-1.jpg
The star WASP-1.
Observation data
Epoch J2000       Equinox J2000
Constellation Andromeda [1]
Right ascension 00h 20m 40.0746s [2]
Declination +31° 59′ 23.955″ [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
Radial velocity (Rv)−13.90(59) [2]  km/s
Proper motion (μ)RA: −4.692(22)  mas/yr [2]
Dec.: −3.320(20)  mas/yr [2]
Parallax (π)2.6108 ± 0.0218  mas [2]
Distance 1,250 ± 10  ly
(383 ± 3  pc)
Absolute magnitude  (MV)3.63+0.13
−0.14 [3]
Details [3]
Mass 1.301+0.049
−0.047  M☉
Radius 1.515+0.052
−0.045  R☉
Luminosity 2.88+0.36
−0.30  L☉
Surface gravity (log g)4.190+0.020
−0.022  cgs
Temperature 6110±75  K
Metallicity [Fe/H]0.26±0.08  dex
Age 3.0±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
SIMBAD data

WASP-1 is a metal-rich magnitude 12 star located about 1,250 light-years away [2] in the Andromeda constellation. [6]

Contents

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<0.01390.0+0.0
−2.9 ° 		1.514+0.052
−0.047  RJ

See also

Related Research Articles

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HD 20367 is a star in the constellation of Aries, close to the border with the Perseus constellation. It is a yellow-white hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.40. Based upon parallax measurements, it is located 85 light years from the Sun. It is drifting further away with a radial velocity of +6.5 km/s. Based upon its movement through space, it is a candidate member of the Ursa Major Moving Group of co-moving stars that probably share a common origin.

<span class="mw-page-title-main">Wide Angle Search for Planets</span> Exoplanet search project

WASP or Wide Angle Search for Planets is an international consortium of several academic organisations performing an ultra-wide angle search for exoplanets using transit photometry. The array of robotic telescopes aims to survey the entire sky, simultaneously monitoring many thousands of stars at an apparent visual magnitude from about 7 to 13.

<span class="mw-page-title-main">XO-1</span> Star in the constellation Corona Borealis

XO-1 (Moldoveanu) is a magnitude 11 G-type main-sequence star located approximately 530 light-years away in the constellation Corona Borealis. XO-1 has a mass and radius similar to the Sun. In 2006 the extrasolar planet XO-1b was discovered orbiting XO-1 by the transit method using the XO Telescope.

<span class="mw-page-title-main">XO-1b</span> Extrasolar planet in the constellation Corona Borealis

XO-1b is an extrasolar planet approximately 536 light-years away from Earth.

<span class="mw-page-title-main">WASP-1b</span> Extrasolar planet in the Andromeda constellation

WASP-1b is an extrasolar planet orbiting the star WASP-1 located 1,300 light-years away in the constellation Andromeda.

<span class="mw-page-title-main">WASP-2b</span> Extrasolar planet in the constellation Delphinus

WASP-2b is an extrasolar planet orbiting the star WASP-2 located about 500 light years away in the constellation of Delphinus. It was discovered via the transit method, and then follow up measurements using the radial velocity method confirmed that WASP-2b was a planet. The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. Unlike Jupiter, but similar to many other planets detected around other stars, WASP-2b is located very close to its star, and belongs to the class of planets known as hot Jupiters. A 2008 study concluded that the WASP-2b system is a binary star system allowing even more accurate determination of stellar and planetary parameters.

WASP-2 is a binary star system in the Delphinus constellation located about 500 light-years away. The primary is magnitude 12 orange dwarf star, orbited by red dwarf star on wide orbit. The star system shows an infrared excess noise of unknown origin.

WASP-10 is a star in the constellation Pegasus. The SuperWASP project has observed and classified this star as a variable star, perhaps due to the eclipsing planet.

WASP-14 or BD+22 2716 is a star in the constellation Boötes. The SuperWASP project has observed and classified this star as a variable star, perhaps due to the eclipsing planet.

WASP-3 is a magnitude 10 yellow-white dwarf star located about 800 light-years away in the Lyra constellation. It appears to be variable; it "passed from a less active to a more active state between 2007 and 2010".

GSC 03089-00929 is a magnitude 12 star located approximately 757 light-years away in the constellation of Hercules. This star is a G type main sequence star that is similar to but slightly cooler than the Sun. This star is identified in SIMBAD as a variable star per the 1SWASP survey.

WASP-17 is an F-type main sequence star approximately 1,310 light-years away in the constellation Scorpius.

WASP-16 is a magnitude 11 yellow dwarf main sequence star, with characteristics similar to the Sun, located in the Virgo constellation.

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

<span class="mw-page-title-main">HD 15082</span> Star in the constellation Andromeda

HD 15082 is a star located roughly 397 light years away in the northern constellation of Andromeda. The star is a Delta Scuti variable and a planetary transit variable. A hot Jupiter type extrasolar planet, named WASP-33b or HD 15082b, orbits this star with an orbital period of 1.22 days. It is the first Delta Scuti variable known to host a planet.

WASP-24 is an F-type star with the Hot Jupiter planet WASP-24b in orbit. WASP-24 is slightly larger and more massive than the Sun, it is also has a similar Metallicity and is hotter than the Sun. WASP-24 was first observed by the SuperWASP planet-searching organization, which flagged it as a potential host to a planet before following up with radial velocity and spectral measurements. Analysis of these confirmed the planetary nature of WASP-24b, which was later released to the public on the SuperWASP website.

<span class="mw-page-title-main">WASP-21</span> Star in the constellation Pegasus

WASP-21 is a G-type star that is reaching the end of its main sequence lifetime approximately 850 light years from Earth in the constellation of Pegasus. The star is relatively metal-poor, having 40% of heavy elements compared to the Sun. Kinematically, WASP-21 belongs to the thick disk of the Milky Way. It has an exoplanet named WASP-21b.

HD 146389, is a star with a yellow-white hue in the northern constellation of Hercules. The star was given the formal name Irena by the International Astronomical Union in January 2020. It is invisible to the naked eye with an apparent visual magnitude of 9.4 The star is located at a distance of approximately 446 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −9 km/s. The star is known to host one exoplanet, designated WASP-38b or formally named 'Iztok'.

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. Bibcode:1987PASP...99..695R. doi: 10.1086/132034 . Vizier query form
  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 3 4 Torres, Guillermo; Winn, Joshua N.; Holman, Matthew J. (2008). "Improved Parameters for Extrasolar Transiting Planets". The Astrophysical Journal. 677 (2): 1324–1342. arXiv: 0801.1841 . Bibcode:2008ApJ...677.1324T. doi:10.1086/529429. S2CID   12899134.
  4. 1 2 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. arXiv: astro-ph/0609688 . Bibcode:2007MNRAS.375..951C. doi: 10.1111/j.1365-2966.2006.11350.x . S2CID   735515.
  5. 1 2 "TYC 2265-107-1". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved 2009-05-20.
  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. arXiv: 0705.1677 . Bibcode:2007MNRAS.379..773S. doi: 10.1111/j.1365-2966.2007.11976.x . S2CID   17565024.
  7. ↑ Simpson, E. K.; Pollacco, D.; Cameron, A. Collier; Hébrard, G.; Anderson, D. R.; Barros, S. C. C.; Boisse, I.; Bouchy, F.; Faedi, F.; Gillon, M.; Hebb, L.; Keenan, F. P.; Miller, G. R. M.; Moutou, C.; Queloz, D.; Skillen, I.; Sorensen, P.; Stempels, H. C.; Triaud, A.; Watson, C. A.; Wilson, P. A. (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. arXiv: 1011.5664 . Bibcode:2011MNRAS.414.3023S. doi: 10.1111/j.1365-2966.2011.18603.x . S2CID   46522188.
  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. arXiv: 1405.3288 . Bibcode:2014AN....335..797G. doi:10.1002/asna.201412072. S2CID   118341059.
  9. ↑ Maciejewski, G.; et al. (2014). "Revisiting Parameters for the WASP-1 Planetary System" (PDF). Acta Astronomica. 64 (1): 11–26. arXiv: 1402.6518 . Bibcode:2014AcA....64...27M.
  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. arXiv: 1704.00373 . Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882. S2CID   118923163.
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