WASP-3

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WASP-3
File:WASP-3LightCurve.png
A light curve for WASP-3, plotted from TESS data[1]
Characteristics
WASP-3A
Evolutionary stage main sequence[2]
Spectral type F7V[3]
Apparent magnitude (B) 11.07±0.06[3]
Apparent magnitude (G) 10.4541±0.0028[3][4]
Apparent magnitude (J) 9.603±0.020[3]
Apparent magnitude (H) 9.407±0.014[3]
Apparent magnitude (K) 9.361±0.015[3]
Variable type planetary transit[5]
WASP-3B
Apparent magnitude (J) 16.88±0.12[6]
Apparent magnitude (H) 16.090±0.079[6]
Apparent magnitude (K) 16.002±0.052[6]
Astrometry
WASP-3A
Radial velocity (Rv)−5.490±0.007[7] km/s
Proper motion (μ) RA: −5.791(12) mas/yr[2]
Dec.: −21.929(15) mas/yr[2]
Parallax (π)4.3338±0.0120 mas[2]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Details
WASP-3A
Mass1.24+0.06
−0.11[7]Template:Rp M☉
Radius1.366±0.044[8] R☉
Surface gravity (log g)4.30+0.07
−0.03[7]Template:Rp cgs
Temperature6400±100[7]Template:Rp K
Metallicity0.00±0.20[7]Template:Rp
Rotational velocity (v sin i)13.4±1.5[8] km/s
Age2.1±1.2[8] Gyr
WASP-3B
Mass0.108±0.006[6]Template:Rp M☉
Surface gravity (log g)~5.22[6]Template:Rp cgs
Temperature~2900[6]Template:Rp K
Position (relative to WASP-3A)[6]Template:Rp
ComponentWASP-3B
Epoch of observation2012–2013
Angular distance~1.19″
Position angle~87.1°
Projected separation300±20 AU
Position (relative to WASP-3A)[4]
ComponentWASP-3C
Angular distance18.33192±0.00002″
Position angle245.81872±0.00006°
Projected separation4230 AU
Other designations
Template:Odlist, USNO-B1.0 1256-00285133, 1SWASP J183431.62+353941.4[3]
Database references
SIMBADdata
Exoplanet Archivedata

WASP-3 is a triple star system located about 753 light-years (231 parsecs) away from the Sun in the constellation Lyra. The system has an apparent magnitude of 10. The brightest and most massive star of this system is WASP-3A, an F-type main sequence star which has one known transiting hot Jupiter exoplanet, WASP-3b. Since the planet transits the star, the star is classified as a planetary transit variable and has received the variable star designation V838 Lyrae.[5]

Triple system

WASP-3 has been identified as a triple star system in a 2019 study of astrometry from the Gaia mission.[9]Template:Rp The brightest and most massive component of the system is WASP-3A, an F-type main sequence star that is 1.24 times as massive as the Sun and 1.31 times as large as the Sun in radius.[7]Template:Rp WASP-3A appears to be a variable star; observations between 2007 and 2010 show that the star's chromospheric activity had increased during that time period.[10] The second companion, WASP-3B, is a low-mass star about 0.11 times as massive as the Sun and has an effective temperature of about 2900 K.[6]Template:Rp WASP-3B is separated eastward from WASP-3A at an angular separation of approximately 1.19 arcseconds, corresponding to a projected separation distance of about 300 AU.[6]Template:Rp WASP-3B was first identified in observations from 2012 to 2013.[6]Template:Rp The third companion, WASP-3C, is much more distant with an angular separation of approximately 18.3 arcseconds from WASP-3A, corresponding to a projected separation distance of 4230 AU.[9]Template:Rp WASP-3C is about 0.77 times as massive as the Sun and has an effective temperature of about 4700 K.[4]

Planetary system

WASP-3A has one known transiting hot Jupiter extrasolar planet, WASP-3b, which was detected by the SuperWASP project in 2007.[7] It was confirmed in 2008 by observations from the William Herschel Telescope.

In 2010, researchers proposed a second planet orbiting WASP-3A due to transit timing variations in WASP-3b.[11][12] But in 2012 this proposal was refuted.[10]

The WASP-3 planetary system[8]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination
(°) 		Radius
b 1.89±0.12 MJ 0.03182+0.00080
−0.00085 		1.8468351(4) <0.0058 83.72±0.39 1.416±0.047 RJ

See also

References

  1. ^ Page Module:Citation/CS1/styles.css has no content."MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 11 April 2025.
  2. ^ a b c Template:Cite Gaia DR3
  3. ^ a b c d e f g Page Module:Citation/CS1/styles.css has no content."TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-04. {{cite web}}: Invalid |mode=Script error: No such module "Citation mode". (help)
  4. ^ a b c Page Module:Citation/CS1/styles.css has no content.Michel, Kai-Uwe; Mugrauer, Markus (January 2024). "Gaia search for (sub)stellar companions of exoplanet hosts (Supplementary file)". Monthly Notices of the Royal Astronomical Society. 527 (2): 3183–3195. Bibcode:2024MNRAS.527.3183M. doi:10.1093/mnras/stad3196.
  5. ^ a b Page Module:Citation/CS1/styles.css has no content."V838 Lyr". General Catalog of Variable Stars - VizieR. Retrieved 3 April 2025.
  6. ^ a b c d e f g h i j Page Module:Citation/CS1/styles.css has no content.Ngo, Henry; Knutson, Heather A.; Hinkley, Sasha; Crepp, Justin R.; Bechter, Eric B.; Batygin, Konstantin; et al. (February 2015). "Friends of Hot Jupiters. II. No Correspondence between Hot-jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions". The Astrophysical Journal. 800 (2): 22. arXiv:1501.00013. Bibcode:2015ApJ...800..138N. doi:10.1088/0004-637X/800/2/138. 138.
  7. ^ a b c d e f g Page Module:Citation/CS1/styles.css has no content.Pollacco, D.; et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet". Monthly Notices of the Royal Astronomical Society. 385 (3): 1576–1584. arXiv:0711.0126. Bibcode:2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x. S2CID 2317308.
  8. ^ a b c d Page Module:Citation/CS1/styles.css has no content.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.
  9. ^ a b Page Module:Citation/CS1/styles.css has no content.Mugrauer, M. (December 2019). "Search for stellar companions of exoplanet host stars by exploring the second ESA-Gaia data release". Monthly Notices of the Royal Astronomical Society. 490 (4): 5088–5102. Bibcode:2019MNRAS.490.5088M. doi:10.1093/mnras/stz2673.
  10. ^ a b Page Module:Citation/CS1/styles.css has no content.M Montalto; Gregorio, J.; Boue, G.; Mortier, A.; Boisse, I.; Oshagh, M.; Maturi, M.; Figueira, P.; Sousa, S.; Santos, N. C. (Nov 2, 2012). "A new analysis of the WASP-3 system: no evidence for an additional companion". MNRAS. 427 (4): 2757. arXiv:1211.0218. Bibcode:2012MNRAS.427.2757M. doi:10.1111/j.1365-2966.2012.21926.x. S2CID 59381004.
  11. ^ Planet found tugging on transits Script error: No such module "webarchive"., Astronomy Now, 9 July 2010
  12. ^ Page Module:Citation/CS1/styles.css has no content.G.Maciejewski; D.Dimitrov; R.Neuhaeuser; A.Niedzielski; St.Raetz; Ch.Ginski; Ch.Adam, C.Marka; M.Moualla; M.Mugrauer (2010). "Transit timing variation in exoplanet WASP-3b". Monthly Notices of the Royal Astronomical Society. 407 (4): 2625–2631. arXiv:1006.1348. Bibcode:2010MNRAS.407.2625M. doi:10.1111/j.1365-2966.2010.17099.x. S2CID 120998224.

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