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Analytic Light Curves for Planetary Transit Searches

Mandel, Kaisey and Agol, Eric (2002) Analytic Light Curves for Planetary Transit Searches. Astrophysical Journal, 580 (2). L171-L175. ISSN 0004-637X. doi:10.1086/345520.

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We present exact analytic formulae for the eclipse of a star described by quadratic or nonlinear limb darkening. In the limit that the planet radius is less than a tenth of the stellar radius, we show that the exact light curve can be well approximated by assuming the region of the star blocked by the planet has constant surface brightness. We apply these results to the Hubble Space Telescope observations of HD 209458, showing that the ratio of the planetary to stellar radii is 0.1207 ± 0.0003. These formulae give a fast and accurate means of computing light curves using limb-darkening coefficients from model atmospheres that should aid in the detection, simulation, and parameter fitting of planetary transits.

Item Type:Article
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URLURL TypeDescription Paper
Agol, Eric0000-0002-0802-9145
Alternate Title: Analytic Lightcurves for Planetary Transit Searches
Additional Information:© 2002. The American Astronomical Society. Received 2002 September 20; accepted 2002 October 7; published 2002 November 8. We thank Sara Seager and Leon Koopmans for useful discussions. Support for E. A. was provided by the National Aeronautics and Space Administration through Chandra Postdoctoral Fellowship award PF0-10013 issued by the Chandra X-Ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory for and on behalf of the National Aeronautics Space Administration under contract NAS8-39073. K. M. was supported by a Caltech Summer Undergraduate Research Fellowship.
Funding AgencyGrant Number
NASA Chandra FellowshipPF0-10013
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:binaries: eclipsing; eclipses; occultations; planetary systems
Issue or Number:2
Record Number:CaltechAUTHORS:20170408-135535372
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Official Citation:Kaisey Mandel and Eric Agol 2002 ApJ 580 L171
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75888
Deposited By: 1Science Import
Deposited On:13 Apr 2017 22:20
Last Modified:15 Nov 2021 16:55

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