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Asymmetric Transit Curves as Indication of Orbital Obliquity: Clues from the Brown Dwarf Companion in KOI-13

Published online by Cambridge University Press:  23 April 2012

G. M. Szabó ,
R. Szabó ,
J. M. Benkö ,
H. Lehmann ,
G. Mezö ,
A. E. Simon ,
Z. Kövári ,
G. Hodosán ,
Z. Regály  and
L. L. Kiss
G. M. Szabó
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
R. Szabó
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
J. M. Benkö
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
H. Lehmann
Affiliation:
Thüringer Landessternwarte, 07778 Tautenburg, Germany
G. Mezö
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
A. E. Simon
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
Z. Kövári
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
G. Hodosán
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
Z. Regály
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected]
L. L. Kiss
Affiliation:
Konkoly Observatory of the Hungarian Academy of Sciences, P.O. Box 67, H-1525 Budapest, Hungary, email: [email protected] Sydney Institute for Astronomy, School of Physics A28, University of Sydney, NSW 2006, Australia
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Abstract

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Exoplanets orbiting rapidly rotating stars may have unusual light curve shapes. These objects transit across an oblate disk with non-isotropic surface brightness, caused by the gravitational darkening. If such asymmetries are measured, one can infer the orbital obliquity of the exoplanet and the gravity darkened star, even without the analysis of the Rossiter-McLaughlin effect or interferometry. Here we introduce KOI-13 as the first example of a transiting system with a gravity darkened star.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S282: From Interacting Binaries to Exoplanets: Essential Modeling Tools , July 2011 , pp. 139 - 140
Copyright
Copyright © International Astronomical Union 2012

References

Barnes, J. W. 2009, ApJ, 705, 683Google Scholar
Szabó, Gy. M. et al. , 2011, ApJ (Letters), 736, 4Google Scholar
Szabó, Gy. M. & Kiss, L. L. 2011, ApJ (Letters), 727, 44CrossRefGoogle Scholar