SIMBAD references

2018MNRAS.474.5485T - Mon. Not. R. Astron. Soc., 474, 5485-5499 (2018/March-2)

Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32 A b from multiband photometry.

TREGLOAN-REED J., SOUTHWORTH J., MANCINI L., MOLLIERE P., CICERI S., BRUNI I., RICCI D., AYALA-LOERA C. and HENNING T.

Abstract (from CDS):

We present high-precision photometry of eight separate transit events in the HAT-P-32 planetary system. One transit event was observed simultaneously by two telescopes of which one obtained a simultaneous multiband light curve in three optical bands, giving a total of 11 transit light curves. Due to the filter selection and in conjunction with using the defocused photometry technique, we were able to obtain an extremely high-precision, ground-based transit in the u band (350 nm), with an rms scatter of ≃1 mmag. All 11 transits were modelled using PRISM and GEMC, and the physical properties of the system calculated. We find the mass and radius of the host star to be 1.182 ± 0.041 M and 1.225 ± 0.015 R, respectively. For the planet, we find a mass of 0.80 ± 0.14 MJup, a radius of 1.807 ± 0.022 RJup, and a density of 0.126 ± 0.023 ρJup. These values are consistent with those found in the literature. We also obtain a new orbital ephemeris for the system T0 = BJD/TDB 2 454 420.447187(96) + 2.15000800(10) x E. We measured the transmission spectrum of HAT-P-32 A b and compared it to theoretical transmission spectra. Our results indicate a bimodal cloud particle distribution consisting of Rayleigh-like haze and grey absorbing cloud particles within the atmosphere of HAT-P-32 A b.

Abstract Copyright: © 2017 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - planets and satellites: atmospheres - planets and satellites: gaseous planets - stars: fundamental parameters - stars: individual: HAT-P-32 A - planetary systems

Simbad objects: 19

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2021.04.22-20:06:15

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