SIMBAD references

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.

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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