Combining Secondary Eclipse and Phase Variation Mapping of Transiting Exoplanets: A 2-D Map of HD189733b at 8 Micron

Details Combining Secondary Eclipse and Phase Variation Mapping of Transiting Exoplanets: A 2-D Map of HD189733b at 8 Micron Combining Secondary Eclipse and Phase Variation Mapping of Transiting Exoplanets: A 2-D Map of HD189733b at 8 Micron

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21734313m&link_type=abstract

American Astronomical Society, AAS Meeting #217, #343.13; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

It has previously been proposed that the secondary eclipse light curve of a transiting exoplanet can be used to make a map of its day-side brightness. We examine the methods by which we might extract such a map, focusing on two particular methods, the first utilizing regularization and second spherical harmonics. We detail the assumptions made and limitations inherent in each, and in doing so rule out regularization as an acceptable method. We show that the spherical harmonic method may be easily generalized to include phase variation data. We then apply the spherical harmonic method to the Spitzer eclipse data presented by Agol et. al. (2010) and the phase variation data used by Knutson et. al. (2007), obtaining a rough 2-D map of the planet at 8 micron. We also apply the method to simulated data to explore the factors governing map quality. Finally, we discuss the success of the application, compare the results to previous work in mapping and modeling Hot Jupiters, and ask what observational advancements would be required to improve map quality and detail.

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