2011A&A...527A...8S

Query : 2011A&A...527A...8S

2011A&A...527A...8S - Astronomy and Astrophysics, volume 527A8-8 (2011/3-1)

A much lower density for the transiting extrasolar planet WASP-7.

SOUTHWORTH J., DOMINIK M., JORGENSEN U.G., RAHVAR S., SNODGRASS C., ALSUBAI K., BOZZA V., BROWNE P., BURGDORF M., CALCHI NOVATI S., DODDS P., DREIZLER S., FINET F., GERNER T., HARDIS S., HARPSOE K., HELLIER C., HINSE T.C., HUNDERTMARK M., KAINS N., KERINS E., LIEBIG C., MANCINI L., MATHIASEN M., PENNY M.T., PROFT S., RICCI D., SAHU K., SCARPETTA G., SCHAEFER S., SCHOENEBECK F. and SURDEJ J.

Abstract (from CDS):

We present the first high-precision photometry of the transiting extrasolar planetary system WASP-7, obtained using telescope defocussing techniques and reaching a scatter of 0.68mmag per point. We find that the transit depth is greater and that the host star is more evolved than previously thought. The planet has a significantly larger radius (1.330±0.093RJup versus 0.915+0.046–0.040RJup) and much lower density (0.41±0.10ρJup versus 1.26+0.25–0.21ρJup) and surface gravity (13.4 ±2.6m/s2 versus 26.4+4.4–4.0m/s2) than previous measurements showed. Based on the revised properties it is no longer an outlier in planetary mass-radius and period-gravity diagrams. We also obtain a more precise transit ephemeris for the WASP-7 system.

Abstract Copyright: ∼

Journal keyword(s): planets and satellites: fundamental parameters - planetary systems - stars: individual: WASP-7

VizieR on-line data: <Available at CDS (J/A+A/527/A8): wasp7.dat>

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HAT-P-15b Pl 04 24 59.5350210144 +39 27 38.312978976           ~ 60 1
2 CoRoT-13 EB* 06 50 53.0726565720 -05 05 11.190799896   15.33 15.039 15.17 14.19 G0V 36 1
3 HD 197286b Pl 20 44 10.2208462488 -39 13 30.855881604           ~ 76 1
4 HD 197286 PM* 20 44 10.2208462488 -39 13 30.855881604   9.98 9.50     F5V 91 1

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