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Using the chromatic Rossiter-McLaughlin effect to probe the broadband signature in the optical transmission spectrum of HD 189733b

Author： Di Gloria E. Snellen I. A. G. Albrecht S.

Publisher： Edp Sciences

E-ISSN： 1432-0746|580|issue|A84-A84

ISSN： 0004-6361

Source： Astronomy & Astrophysics, Vol.580, Iss.issue, 2015-08, pp. : A84-A84

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

Context. Transmission spectroscopy is a powerful technique for probing exoplanetary atmospheres. A successful ground-based observational method uses a differential technique that uses high-dispersion spectroscopy, but it only preserves narrow features in transmission spectra. Broadband features, such as the remarkable Rayleigh-scattering slope from possible hazes in the atmosphere of HD 189733b as observed by the Hubble Space Telescope, cannot be probed in this way.

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