Information-Theoretic Approach to Optimize JWST Observations and Retrievals of Transiting Exoplanet Atmospheres

Alex R. Howe, Adam Burrows, Drake Deming
(Submitted on 5 Dec 2016)

We provide an example of an analysis to explore the optimization of observations of transiting hot jupiters with JWST to characterize their atmospheres, based on a simple three-parameter forward model. We construct expansive forward model sets for eleven hot jupiters, ten of which are relatively well-characterized, exploring a range of parameters such as equilibrium temperature and metallicity, as well as considering host stars over a wide range in brightness. We compute posterior distributions of our model parameters for each planet with all of the available JWST spectroscopic modes and several programs of combined observations and compute their effectiveness using the metric of estimated mutual information per degree of freedom. From these simulations, clear trends emerge that provide guidelines for designing a JWST observing program. We demonstrate that these guidelines apply over a wide range of planet parameters and target brightnesses for our simple forward model.

Comments: Accepted to ApJ, 14 figures, 8 tables
Subjects: Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:1612.01245 [astro-ph.EP] (or arXiv:1612.01245v1 [astro-ph.EP] for this version)
Submission history
From: Alex Howe
[v1] Mon, 5 Dec 2016 04:34:08 GMT (1653kb)
http://xxx.lanl.gov/abs/1612.01245