SIMBAD references

2016ApJ...832..191N - Astrophys. J., 832, 191-191 (2016/December-1)

VLT FORS2 comparative transmission spectroscopy: detection of Na in the atmosphere of WASP-39b from the ground.

NIKOLOV N., SING D.K., GIBSON N.P., FORTNEY J.J., EVANS T.M., BARSTOW J.K., KATARIA T. and WILSON P.A.

Abstract (from CDS):

We present transmission spectroscopy of the warm Saturn-mass exoplanet WASP-39b made with the Very Large Telescope FOcal Reducer and Spectrograph (FORS2) across the wavelength range 411-810 nm. The transit depth is measured with a typical precision of 240 parts per million (ppm) in wavelength bins of 10 nm on a V = 12.1 mag star. We detect the sodium absorption feature (3.2σ) and find evidence of potassium. The ground-based transmission spectrum is consistent with Hubble Space Telescope (HST) optical spectroscopy, supporting the interpretation that WASP-39b has a largely clear atmosphere. Our results demonstrate the great potential of the recently upgraded FORS2 spectrograph for optical transmission spectroscopy, with which we obtained HST-quality light curves from the ground.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): planets and satellites: atmospheres - stars: individual: WASP-39 - techniques: photometric - techniques: spectroscopic - techniques: spectroscopic

Simbad objects: 7

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2021.05.07-19:31:51

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