WASP-157b, a Transiting Hot Jupiter Observed with K2
T. Mo\v{c}nik, D. R. Anderson, D. J. A. Brown, A. Collier Cameron, L., Delrez, M. Gillon, C. Hellier, E. Jehin, M. Lendl, P. F. L. Maxted, M., Neveu-VanMalle, F. Pepe, D. Pollacco, D. Queloz, D. S\'egransan, B. Smalley,, J. Southworth, A. H. M. J. Triaud, S. Udry, R. G. West
TL;DR
This paper reports the discovery and characterization of WASP-157b, a hot Jupiter transiting a G2 star, observed with K2, with detailed measurements of its mass, radius, and orbital properties.
Contribution
The study presents the first detection and detailed analysis of WASP-157b using K2 data, including its physical parameters and non-detection of phase variations.
Findings
WASP-157b has a mass of 0.57 M_Jup and radius of 1.06 R_Jup.
The planet orbits its star every 3.95 days.
No rotational or phase-curve modulations detected.
Abstract
We announce the discovery of the transiting hot Jupiter WASP-157b in a 3.95-d orbit around a V = 12.9 G2 main-sequence star. This moderately inflated planet has a Saturn-like density with a mass of M and a radius of R. We do not detect any rotational or phase-curve modulations, nor the secondary eclipse, with conservative semi-amplitude upper limits of 250 and 20 ppm, respectively.
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