2009AJ....137.3826W


Query : 2009AJ....137.3826W

2009AJ....137.3826W - Astron. J., 137, 3826-3833 (2009/April-0)

The transit light curve project. XI. Submillimagnitude photometry of two transits of the bloated planet WASP-4b.

WINN J.N., HOLMAN M.J., CARTER J.A., TORRES G., OSIP D.J. and BEATTY T.

Abstract (from CDS):

We present photometry of two transits of the giant planet WASP-4b with a photometric precision of 400-800 parts per million and a time sampling of 25-40 s. The two midtransit times are determined to within 6 s. Together with previously published times, the data are consistent with a constant orbital period, giving no compelling evidence for period variations that would be produced by a satellite or additional planets. Analysis of the new photometry, in combination with stellar-evolutionary modeling, gives a planetary mass and radius of 1.237±0.064 MJup and 1.365±0.021 RJup, respectively. The planet is 15% larger than expected based on previously published models of solar-composition giant planets. With data of the quality presented here, the detection of transits of a "super-Earth" of radius 1.75 Rwould have been possible.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: WASP-4 = USNO-B1.0 0479-0948995

VizieR on-line data: <Available at CDS (J/AJ/137/3826): table1.dat>

Simbad objects: 3

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Number of rows : 3
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 HD 209458 V* 22 03 10.7729598762 +18 53 03.548248479   8.21 7.63     F9V 1025 1
2 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 140 1
3 WASP-4b Pl 23 34 15.0858223039 -42 03 41.049468209           ~ 132 1

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2021.09.19-19:54:21

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