2009A&A...501..785G

Query : 2009A&A...501..785G

2009A&A...501..785G - Astronomy and Astrophysics, volume 501, 785-792 (2009/7-2)

Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star.

GILLON M., ANDERSON D.R., TRIAUD A.H.M.J., HELLIER C., MAXTED P.F.L., POLLACO D., QUELOZ D., SMALLEY B., WEST R.G., WILSON D.M., BENTLEY S.J., COLLIER CAMERON A., ENOCH B., HEBB L., HORNE K., IRWIN J., JOSHI Y.C., LISTER T.A., MAYOR M., PEPE F., PARLEY N., SEGRANSAN D., UDRY S. and WHEATLEY P.J.

Abstract (from CDS):

We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060^+ 0.0000022 ^–0.0000035days a mildly metal-poor solar-type star of magnitude V=11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass Mp=0.503+0.019–0.038MJ and radius Rp=1.224+0.051–0.052RJ, resulting in a density ρp=0.27±0.05ρJ. The mass and radius for the host star are M*=0.88+0.05–0.08M☉ and R*=0.870+0.025–0.036R☉. The non-zero orbital eccentricity e=0.054+0.018–0.015 that we measure suggests that the planet underwent a massive tidal heating ∼1Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis β= 11+14–18deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk.

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Journal keyword(s): binaries: eclipsing - stars: individual: WASP-6 - planetary systems - techniques: photometric - techniques: radial velocities - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/501/785): rise1.dat rise2.dat swasp.dat fts.dat coralie.dat harps.dat>

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 BD+57 793 * 04 21 52.7048156328 +57 49 01.889294952   10.27 9.85     F5V 152 2
2 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 810 1
3 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 174 2
4 HD 149026b Pl 16 30 29.6185771608 +38 20 50.308980864           ~ 351 1
5 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 1858 1
6 WASP-6 * 23 12 37.7368282608 -22 40 26.273805024   12.90 11.91     G8V 94 1
7 WASP-6b Pl 23 12 37.7368282608 -22 40 26.273805024           ~ 138 1

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