2009A&A...496..259G


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.25CET15:26:55

2009A&A...496..259G - Astronomy and Astrophysics, volume 496, 259-267 (2009/3-2)

Improved parameters for the transiting hot jupiters WASP-4b and WASP-5b.

GILLON M., SMALLEY B., HEBB L., ANDERSON D.R., TRIAUD A.H.M.J., HELLIER C., MAXTED P.F.L., QUELOZ D. and WILSON D.M.

Abstract (from CDS):

The gaseous giant planets WASP-4b and WASP-5b are transiting 12-magnitude solar-type stars in the Southern hemisphere. The aim of the present work is to refine the parameters of these systems using high cadence VLT/FORS2 z-band transit photometry and high-resolution VLT/UVES spectroscopy. For WASP-4, the new estimates for the planet radius and mass from a combined analysis of our VLT data with previously published transit photometry and radial velocities are Rp=1.30+0.05–0.04RJ and Mp=1.21+0.13–0.08MJ, resulting in a density ρp=0.55+0.04–0.02ρJ. The radius and mass for the host star are R*=0.87+0.04–0.03R and M*=0.85+0.11–0.07M. Our ground-based photometry reaches 550ppm at time sampling of ∼50s. Nevertheless, we also report the presence of an instrumental effect on the VLT that degraded our photometry for the WASP-5 observations. This effect could be a major problem for similar programs. Our new estimates for the parameters of the WASP-5 system are Rp=1.09±0.07RJ, Mp=1.58+0.13–0.10MJ, ρp=1.23+0.26–0.16ρJ, R*=1.03+0.06–0.07R, and M*=0.96+0.13–0.09M. The measured size of WASP-5b agrees well with the basic models of irradiated planets, while WASP-4b is clearly an ``anomalously'' large planet.

Abstract Copyright:

Journal keyword(s): binaries: eclipsing - planetary systems - stars: individual: WASP-4 - stars: individual: WASP-5 - techniques: photometric - techniques: spectroscopic

Simbad objects: 11

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Number of rows : 11

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 [DB2002b] G165.34-26.44 DNe 03 34 56 +22 40.0           ~ 5 0
2 Ross 905 PM* 11 42 11.0933874353 +26 42 23.658083337   12.06 10.613 10.272 8.24 M3V 518 1
3 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 637 1
4 BD+28 2507b Pl 16 02 11.8463105423 +28 10 10.419642379           ~ 162 1
5 HD 189733 BY* 20 00 43.7130382888 +22 42 39.071811263 9.241 8.578 7.648 7.126 6.68 K2V 745 1
6 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 1009 1
7 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1548 1
8 WASP-4b Pl 23 34 15.0858223039 -42 03 41.049468209           ~ 130 1
9 WASP-4 PM* 23 34 15.0858223039 -42 03 41.049468209   13.51 12.48 11.9   G7V 134 1
10 WASP-5b Pl 23 57 23.7565609528 -41 16 37.745589460           ~ 78 1
11 WASP-5 V* 23 57 23.7565609528 -41 16 37.745589460   12.71 12.3 11.82 11.44 G4V 93 1

    Equat.    Gal    SGal    Ecl

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