HyDRA-H: Simultaneous Hybrid Retrieval of Exoplanetary Emission Spectra
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Abstract
High-resolution Doppler spectroscopy has been used to detect several chemical
species in exoplanetary atmospheres. Such detections have traditionally relied
on cross correlation of observed spectra against spectral model templates, an
approach that is successful for detecting chemical species but not optimised
for constraining abundances. Recent work has explored ways to perform
atmospheric retrievals on high-resolution spectra (HRS) and combine them with
retrievals routinely performed for low-resolution spectra (LRS) by developing a
mapping from the cross correlation function to a likelihood metric. We build
upon previous studies and report HyDRA-H, a hybrid retrieval code for
simultaneous analysis of low- and high- resolution thermal emission spectra of
exoplanets in a fully Bayesian approach. We demonstrate HyDRA-H on the hot
Jupiter HD 209458b as a case study. We validate our HRS retrieval capability by
confirming previous results and report a simultaneous hybrid retrieval using
both HRS and LRS data. The LRS data span the HST WFC3 (1.1-1.7
Description
Keywords
Journal Title
Conference Name
Journal ISSN
1538-3881
Volume Title
Publisher
Publisher DOI
Rights
Sponsorship
Science and Technology Facilities Council (ST/N000927/1)