2MASS J23140726+0839292 , the SIMBAD biblio

2017A&A...600L..11C - Astronomy and Astrophysics, volume 600, L11-11 (2017/4-1)

The GTC exoplanet transit spectroscopy survey. VI. Detection of sodium in WASP-52b's cloudy atmosphere.

CHEN G., PALLE E., NORTMANN L., MURGAS F., PARVIAINEN H. and NOWAK G.

Abstract (from CDS):

We report the first detection of sodium absorption in the atmosphere of the hot Jupiter WASP-52b. We observed one transit of WASP-52b with the low-resolution Optical System for Imaging and low-Intermediate-Resolution Integrated Spectroscopy (OSIRIS) at the 10.4m Gran Telescopio Canarias (GTC). The resulting transmission spectrum, covering the wavelength range from 522nm to 903nm, is flat and featureless, except for the significant narrow absorption signature at the sodium doublet, which can be explained by an atmosphere in solar composition with clouds at 1mbar. A cloud-free atmosphere is stringently ruled out. By assessing the absorption depths of sodium in various bin widths, we find that temperature increases towards lower atmospheric pressure levels, with a positive temperature gradient of 0.88±0.65K/km, possibly indicative of upper atmospheric heating and a temperature inversion.

Abstract Copyright: © ESO, 2017

Journal keyword(s): planetary systems - planets and satellites: individual: WASP-52b - planets and satellites: atmospheres - techniques: spectroscopic - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/A+A/600/L11): list.dat wlc.dat ch01.dat-ch26.dat >

Simbad objects: 8

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