2019AJ....157..217B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST00:35:50

2019AJ....157..217B - Astron. J., 157, 217-217 (2019/June-0)

WASP-4b arrived early for the TESS mission.

BOUMA L.G., WINN J.N., BAXTER C., BHATTI W., DAI F., DAYLAN T., DESERT J.-M., HILL M.L., KANE S.R., STASSUN K.G., VILLASENOR J., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., JENKINS J.M., BERTA-THOMPSON Z., COLON K., FAUSNAUGH M., GLIDDEN A., GUERRERO N., RODRIGUEZ J.E., TWICKEN J.D. and WOHLER B.

Abstract (from CDS):

The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 ± 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6 s offset at the 6.4σ level. The 1.3 day orbital period of WASP-4b appears to be decreasing at a rate of {dot}P=-12.6±1.2 ms per year. The apparent period change might be caused by tidal orbital decay or apsidal precession, although both interpretations have shortcomings. The gravitational influence of a third body is another possibility, though at present there is minimal evidence for such a body. Further observations are needed to confirm and understand the timing variation.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: close - planets and satellites: individual WASP-4b, WASP-5b, WASP-6b, WASP-12b, WASP-18b, WASP-46b - planet-star interactions

VizieR on-line data: <Available at CDS (J/AJ/157/217): table2.dat table5.dat table6.dat table7.dat table8.dat>

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 WASP-18b Pl 01 37 25.0335097438 -45 40 40.376513381           ~ 187 1
2 UCAC2 23531868 * 02 07 38.2093703588 -20 39 42.761678019   13.54 12.60 12.44 11.65 ~ 9 2
3 WASP-12 ** 06 30 32.7966788910 +29 40 20.266334158   12.14 11.57     G0V 208 2
4 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 486 1
5 UCAC2 32961582 * 20 16 49.8900228730 +03 17 38.454665939   13.09 12.47 12.37 11.70 ~ 6 0
6 WASP-46b Pl 21 14 56.8596386903 -55 52 18.460013390           ~ 26 1
7 WASP-6b Pl 23 12 37.7368657624 -22 40 26.277489164           ~ 86 1
8 WASP-4 PM* 23 34 15.0858223039 -42 03 41.049468209   13.51 12.48 11.9   G7V 118 1
9 WASP-4b Pl 23 34 15.0858223039 -42 03 41.049468209           ~ 109 1
10 WASP-5b Pl 23 57 23.7565609528 -41 16 37.745589460           ~ 71 1

    Equat.    Gal    SGal    Ecl

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2019.10.17-00:35:50

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