WASP-3: Difference between revisions
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Revision as of 12:24, 28 March 2012
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 34m 31.6249s[1] |
| Declination | +35° 39′ 41.546″[1] |
| Apparent magnitude (V) | +10.485[1] |
| Characteristics | |
| Spectral type | F7V[1] |
| Apparent magnitude (B) | ~11.01[1] |
| Apparent magnitude (V) | ~10.485[1] |
| Apparent magnitude (J) | 9.603±0.020[1] |
| Apparent magnitude (H) | 9.407±0.014[1] |
| Apparent magnitude (K) | 9.361±0.015[1] |
| Variable type | V*(1SWASP)[1] |
| Astrometry | |
| Proper motion (μ) | RA: -5.20[1] mas/yr Dec.: -23.10[1] mas/yr |
| Distance | 727 ly (223 pc) |
| Details | |
| Mass | 1.24 −0.11+0.06 M☉ |
| Radius | 1.31 −0.12+0.06 R☉ |
| Temperature | 6400 ±100 K |
| Metallicity | 0 (±0.2 |
| Other designations | |
TYC 2636-195-1, 2MASS J18343163+3539415, USNO-B1.0 1256-00285133 | |
| Database references | |
| SIMBAD | data |
WASP-3 is a magnitude 10 yellow-white dwarf star located about 727 light-years away in the Lyra constellation.[1]
Planetary system
The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007.[2] The William Herschel Telescope had confirmed it was a planet by 2008.
In 2010, the possible presence of a second planet orbiting WASP-3 was inferred from timing variations in the transits of WASP-3b.[3] The discovers note that additional observations are required to confirm the presence of this planet candidate, designated WASP-3c. The best-fit parameters for WASP-3c which match the observe timing variations suggest it is close to the outer 2:1 resonance with WASP-3b, with an orbital period of 3.72–3.78 days and a mass 15 times that of the Earth (close to the mass of Uranus). Alternative sets of parameters are possible, though they give a poorer fit to the data: a 6–10 Earth mass planet in an orbit of 3.03–3.05 days (close to the 5:3 resonance), or a 10 Earth mass planet with a period of 3.58–3.64 days (close to the 2:1 resonance) also reproduce the observed timing variations.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 2.06 ± 0.13 MJ | 1.8468372 ± 6e-07 | 0.0313 ± 0.0001 | 0 | — | — |
| c (unconfirmed) | 0.05 MJ | 0.051 | 3.75 | — | — | — |
References
- ^ a b c d e f g h i j k l m "SIMBAD query result: TYC 2636-195-1 -- Star". Centre de Données astronomiques de Strasbourg. Retrieved 2009-05-04.
- ^ Pollacco; Skillen, I.; Collier Cameron, A.; Loeillet, B.; Stempels, H. C.; Bouchy, F.; Gibson, N. P.; Hebb, L.; Hébrard, G.; et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet". Monthly Notices of the Royal Astronomical Society. 385 (3): 1576–1584. Bibcode:2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x.
{{cite journal}}: Explicit use of et al. in:|author=(help) - ^ Planet found tugging on transits, 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". arXiv:1006.1348 [astro-ph.EP].
{{cite arXiv}}: Unknown parameter|version=ignored (help)CS1 maint: multiple names: authors list (link)
External links
- "WASP-3". Exoplanets. Retrieved 2009-05-04.
See also
 | This variable star–related article is a stub. You can help Wikipedia by expanding it. |
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |