WASP-3
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| WASP-3A | |
| Right ascension | 18h 34m 31.6252s[1] |
| Declination | +35° 39′ 41.492″[1] |
| Apparent magnitude (V) | 10.63±0.05[2] |
| WASP-3C | |
| Right ascension | 18h 34m 30.2553s[3][4] |
| Declination | +35° 39′ 34.004″[3][4] |
| Characteristics | |
| WASP-3A | |
| Evolutionary stage | main-sequence star |
| Spectral type | F7V[2] |
| Apparent magnitude (B) | 11.07±0.06[2] |
| Apparent magnitude (G) | 10.4541±0.0028[2][4] |
| Apparent magnitude (J) | 9.603±0.020[2] |
| Apparent magnitude (H) | 9.407±0.014[2] |
| Apparent magnitude (K) | 9.361±0.015[2] |
| 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[1] Dec.: −21.929(15) mas/yr[1] |
| Parallax (π) | 4.3338±0.0120 mas[1] |
| Distance | 753 ± 2 ly (230.7 ± 0.6 pc) |
| Details | |
| WASP-3A | |
| Mass | 1.24+0.06 −0.11[7]: 1581 M☉ |
| Radius | 1.366±0.044[8] R☉ |
| Surface gravity (log g) | 4.30+0.07 −0.03[7]: 1581 cgs |
| Temperature | 6400±100[7]: 1581 K |
| Metallicity | 0.00±0.20[7]: 1581 |
| Rotational velocity (v sin i) | 13.4±1.5[8] km/s |
| Age | 2.1±1.2[8] Gyr |
| WASP-3B | |
| Mass | 0.108±0.006[6]: 14 M☉ |
| Surface gravity (log g) | ~5.22[6]: 13 cgs |
| Temperature | ~2900[6]: 13 K |
| Position (relative to WASP-3A)[6]: 11, 14 | |
| Component | WASP-3B |
| Epoch of observation | 2012–2013 |
| Angular distance | ~1.19″ |
| Position angle | ~87.1° |
| Projected separation | 300±20 AU |
| Position (relative to WASP-3A)[4] | |
| Component | WASP-3C |
| Angular distance | 18.33192±0.00002″ |
| Position angle | 245.81872±0.00006° |
| Projected separation | 4230 AU |
| Other designations | |
| V838 Lyr, BD+35 3293, TOI-2131, TIC 27848472, WASP-3, TYC 2636-195-1, GSC 02636-00195, 2MASS J18343163+3539415, USNO-B1.0 1256-00285133, 1SWASP J183431.62+353941.4[2] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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
[edit]WASP-3 has been identified as a triple star system in a 2019 study of astrometry from the Gaia mission.[9]: 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.[7]: 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.[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]: 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.[6]: 11, 13 WASP-3B was first identified in observations from 2012 to 2013.[6]: 14 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]: 5093 WASP-3C is about 0.77 times as massive as the Sun and has an effective temperature of about 4700 K.[4]
Planetary system
[edit]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]
| 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
[edit]References
[edit]- ^ a b c d 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.
- ^ a b c d e f g h "TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-04.
- ^ a b "UCAC4 629-058739". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 March 2025.
- ^ a b c d e 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.
- ^ a b "V838 Lyr". General Catalog of Variable Stars - VizieR. Retrieved 3 April 2025.
- ^ 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.
- ^ a b c d e f g 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 d 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.
- ^ a b 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.
- ^ 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
[edit]- "WASP-3". Exoplanets. Archived from the original on 2016-03-03. Retrieved 2009-05-04.