2019AJ....157..217B

Query : 2019AJ....157..217B

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 - 2024 		#notes
1 HD 10069b Pl 01 37 25.0332798696 -45 40 40.374717456           ~ 369 1
2 WASP-53 EB* 02 07 38.2094562696 -20 39 42.758493948   13.54 12.60 12.44 11.65 ~ 32 1
3 WASP-12b Pl 06 30 32.7966092352 +29 40 20.263502460           ~ 763 1
4 WASP-12 EB* 06 30 32.7966092352 +29 40 20.263502460   12.14 11.57     G0V 309 1
5 WASP-81 * 20 16 49.8902431128 +03 17 38.458392288   13.09 12.47 12.37 11.70 ~ 21 0
6 WASP-46b Pl 21 14 56.8598669520 -55 52 18.458085144           ~ 49 1
7 WASP-6b Pl 23 12 37.7368282608 -22 40 26.273805024           ~ 138 1
8 WASP-4 EB* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 176 1
9 WASP-4b Pl 23 34 15.0857248317 -42 03 41.047972591           ~ 174 1
10 WASP-5b Pl 23 57 23.7564672192 -41 16 37.743700800           ~ 97 1

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