WASP-3
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 34m 31.6241s[1] |
| Declination | +35° 39′ 41.488″[1] |
| Apparent magnitude (V) | 10.63±0.05[2] |
| Characteristics | |
| WASP-3A | |
| Evolutionary stage | main-sequence star |
| Spectral type | F7V[2] |
| Apparent magnitude (B) | 11.07±0.06[2] |
| Apparent magnitude (J) | 9.603±0.020[2] |
| Apparent magnitude (H) | 9.407±0.014[2] |
| Apparent magnitude (K) | 9.361±0.015[2] |
| WASP-3B | |
| Apparent magnitude (J) | 16.88±0.12[3] |
| Apparent magnitude (H) | 16.090±0.079[3] |
| Apparent magnitude (K) | 16.002±0.052[3] |
| Astrometry | |
| WASP-3A | |
| Radial velocity (Rv) | −5.490±0.007[4] km/s |
| Proper motion (μ) | RA: −4.896±1.058[1] mas/yr Dec.: −21.664±0.686[1] mas/yr |
| Parallax (π) | 4.07±0.32 mas[1] |
| Distance | 800 ± 60 ly (250 ± 20 pc) |
| Details[4]: 1581 | |
| WASP-3A | |
| Mass | 1.24+0.06 −0.11 M☉ |
| Radius | 1.31+0.05 −0.12 R☉ |
| Surface gravity (log g) | 4.30+0.07 −0.03 cgs |
| Temperature | 6400±100 K |
| Metallicity | 0.00±0.20 |
| WASP-3B | |
| Mass | 0.108±0.006[3]: 14 M☉ |
| Surface gravity (log g) | ~5.22[3]: 13 cgs |
| Temperature | ~2900[3]: 13 K |
| Position (relative to WASP-1A)[3]: 11, 14 | |
| Component | WASP-1B |
| Epoch of observation | 2012–2013 |
| Angular distance | ~1.19″ |
| Position angle | ~87.1° |
| Projected separation | 300±20 AU |
| Position (relative to WASP-1A)[5]: 5093 | |
| Component | WASP-1C |
| Angular distance | ~18.3″ |
| Other designations | |
| TYC 2636-195-1, 2MASS J18343163+3539415, USNO-B1.0 1256-00285133, GSC 02636-00195, 1SWASP J183431.62+353941.4, V838 Lyr, 2MASS J18343163+3539415 | |
| Database references | |
| SIMBAD | data |
WASP-3 is a triple star system located about 800 light-years (250 pc) 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.
Triple system
WASP-3 has been identified as a triple star system in a 2019 study of astrometry from the Gaia mission.[5]: 5093 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.[4]: 1581 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.[6] 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.[3]: 11, 13 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.[3]: 11, 13 WASP-3B was first identified in observations from 2012 to 2013.[3]: 14 The third companion, WASP-3C, is much more distant with an angular separation of approximately 18.3 arcseconds from WASP-3A.[5]: 5093
Planetary system
WASP-3A has one known transiting hot Jupiter extrasolar planet, WASP-3b, which was detected by the SuperWASP project in 2007.[4] 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.[7][8] But in 2012 this proposal was refuted.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.06 ± 0.13 MJ | 0.0313 ± 0.0001 | 1.8468372 ± 6e-07 | 0 | — | — |
See also
References
- ^ a b c d e Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
- ^ a b c d e f "TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-04.
- ^ a b c d e f g h i j 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.
{{cite journal}}: CS1 maint: year (link) - ^ a b c d 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.
- ^ a b c 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.
{{cite journal}}: CS1 maint: year (link) - ^ a b 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.
- ^ Planet found tugging on transits Archived 2010-07-13 at the Wayback Machine, Astronomy Now, 9 July 2010
- ^ 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.
External links
- "WASP-3". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-04.