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WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities

Abstract : Aims. We present the discovery and characterisation of the exoplanets WASP-113b and WASP-114b by the WASP surveys, SOPHIE and CORALIE. Methods. The planetary nature of the systems was established by performing follow-up photometric and spectroscopic observations. The follow-up data were combined with the WASP-photometry and analysed with an MCMC code to obtain system parameters. Results. The host stars WASP-113 and WASP-114 are very similar. They are both early G-type stars with an effective temperature of similar to 5900 K, [Fe/H] similar to 0.12, and log g similar to 4.1 dex. However, WASP-113 is older than WASP-114. Although the planetary companions have similar radii, WASP-114b is almost four times heavier than WASP-113b. WASP-113b has a mass of 0.48 M-Jup and an orbital period of similar to 4.5 days; WASP-114b has a mass of 1.77 M-Jup and an orbital period of similar to 1.5 days. Both planets have inflated radii, in particular WASP-113 with a radius anomaly of R = 0.35. The high scale height ofWASP-113b (similar to 950 km) makes it a good target for follow-up atmospheric observations.
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Submitted on : Wednesday, September 8, 2021 - 11:36:41 AM
Last modification on : Thursday, September 9, 2021 - 3:31:38 AM

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S. C. C. Barros, D. J. A. Brown, G. Hébrard, Y. Gomez Maqueo Chew, D. R. Anderson, et al.. WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities. Astronomy and Astrophysics - A&A, EDP Sciences, 2016, 593, ⟨10.1051/0004-6361/201526517⟩. ⟨hal-01441173⟩

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