SIMBAD references

2024A&A...687A.144K - Astronomy and Astrophysics, volume 687A144 (2024/7-1)

The phase curve of the ultra-hot Jupiter WASP-167b as seen by TESS.

KALMAN S., DEREKAS A., CSIZMADIA S., PAL A., SZABO R., SMITH A.M.S., NAGY K., HEGEDUS V., MITNYAN T., SZIGETI L. and SZABO G.M.

Abstract (from CDS):

Context. Ultra-hot Jupiters (UHJs) orbiting pulsating A/F stars represent an important subset of the exoplanetary demographic. They are excellent candidates for the study of exoplanetary atmospheres, and are astrophysical laboratories for the investigation of planet-to- star interactions.
Aims. We analysed the TESS light curve of the WASP-167 system, consisting of an F1V star and a substellar companion on a ~2.02 day orbit.
Methods. We modelled the combination of the ellipsoidal variability and the Doppler beaming to measure the mass of WASP-167b, and the reflection effect to obtain constraints on the geometric albedo, while placing a special emphasis on noise separation. We implemented a basic model to determine the dayside (TDay), nightside (TNight), and intrinsic (TInternal) temperatures of WASP-167b, and put a constraint on its Bond albedo.
Results. We confirm the transit parameters of the planet seen in the literature. We find that a resonant ~2P–1 stellar signal (which may originate from planet-to-star interactions) interferes with the phase curve analysis. After careful and thought-out treatment of this signal, we find Mp = 0.34 ± 0.22 MJ. We measure a dayside temperature of 2790 ± 100 K, classifying WASP-167b as an UHJ. We find a 2σ upper limit of 0.51 on its Bond albedo, and determine the geometric albedo at 0.34 ± 0.11 (1σ uncertainty).
Conclusions. With an occultation depth of 106.8 ± 27.3 ppm in the TESS passband, the UHJ WASP-167b is an excellent target for atmospheric studies, especially those at thermal wavelength ranges, where the stellar pulsations are expected to be less influential.

Abstract Copyright: © The Authors 2024

Journal keyword(s): techniques: photometric - planets and satellites: atmospheres - planets and satellites: detection - planets and satellites: general - planets and satellites: individual: WASP-167b

Simbad objects: 16

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