Exoplanet Atmosphere Retrieval from Multifractal Analysis of Secondary Eclipse Spectra
Earth and Planetary Astrophysics
2021-05-25 v4 Instrumentation and Methods for Astrophysics
Data Analysis, Statistics and Probability
Applications
Abstract
We extend a data-based model-free multifractal method of exoplanet detection to probe exoplanetary atmospheres. Whereas the transmission spectrum is studied during the primary eclipse, we analyze the emission spectrum during the secondary eclipse, thereby probing the atmospheric limb. In addition to the spectral structure of exoplanet atmospheres, the approach provides information to study phenomena such as atmospheric flows, tidal-locking behavior, and the dayside-nightside redistribution of energy. The approach is demonstrated using Spitzer data for exoplanet HD189733b. The central advantage of the method is the lack of model assumptions in the detection and observational schemes.
Keywords
Cite
@article{arxiv.1710.09870,
title = {Exoplanet Atmosphere Retrieval from Multifractal Analysis of Secondary Eclipse Spectra},
author = {Sahil Agarwal and John S. Wettlaufer},
journal= {arXiv preprint arXiv:1710.09870},
year = {2021}
}