2012
DOI: 10.1088/0004-637x/749/1/93
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Information Content of Exoplanetary Transit Spectra: An Initial Look

Abstract: It has been shown that spectroscopy of transiting extrasolar planets can potentially provide a wealth of information about their atmospheres. Herein, we set up the inverse problem in spectroscopic retrieval. We use non-linear optimal estimation to retrieve the atmospheric state (pioneered for Earth sounding by Rodgers 1976Rodgers , 2000. The formulation quantifies the the degrees-of-freedom and information content of the spectrum with respect to geophysical parameters; herein, we focus specifically on temperat… Show more

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Cited by 138 publications
(191 citation statements)
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“…Bottom left: best fit by Lee et al (2012). Bottom right: best solutions retrieved by Line et al (2012) At zero-order approximation, the emitted component of the planetary contribution can be estimated by blackbody curves at the stellar and planetary temperatures (T * and T p ):…”
Section: Fig 7amentioning
confidence: 99%
See 1 more Smart Citation
“…Bottom left: best fit by Lee et al (2012). Bottom right: best solutions retrieved by Line et al (2012) At zero-order approximation, the emitted component of the planetary contribution can be estimated by blackbody curves at the stellar and planetary temperatures (T * and T p ):…”
Section: Fig 7amentioning
confidence: 99%
“…Top right: best solutions retrieved by Griffith and Tinetti (Griffith and Tinetti 2010;Swain et al 2009b). Bottom: best solutions retrieved by Madhusudhan and Seager (2009) 2009b; Madhusudhan and Seager 2009;Lee et al 2012;Line et al 2012). In Fig.…”
Section: Fig 7amentioning
confidence: 99%
“…For example, the photolytic products hydrazine (N 2 H 4 ) and diphosphene (P 2 H 4 ) are expected to be the principal contributors to the hazes in the upper tropospheres of Jupiter and Saturn, although these have never been spectrally identified by remote sensing. Furthermore the disequilibrium models have proved incapable of reproducing the high CO 2 abundances inferred on several EGPs [23,[74][75][76], owing to either missing species in the spectral retrievals or missing photochemical pathways in the model.…”
Section: (E) Photochemical Disequilibriummentioning
confidence: 99%
“…optimal estimation [74,75,[82][83][84][85]). In the latter cases, the intention is to remove bias to any particular assumptions (C/O ratio, solar composition, equilibrium versus disequilibrium) and investigate the possibilities supported by the measurements in as large a parameter space as possible.…”
Section: (A) Degeneracies In Spectral Retrievalmentioning
confidence: 99%
“…The atmospheric retrieval of exoplanetary emission/transmission spectra is a complex undertaking (e.g., Madhusudhan & Seager 2009;Lee et al 2011b;Line et al 2012;Benneke & Seager 2013;Griffith 2014;Waldmann et al 2015aWaldmann et al , 2015b. Here, retrieval parameter dimensionality becomes an important factor to consider and, though desirable, most times allowing for all known atmospheric species to be fitted is too computationally expensive.…”
Section: Introductionmentioning
confidence: 99%