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Transits and secondary eclipses of HD 189733 with Spitzer

Published online by Cambridge University Press:  01 May 2008

Eric Agol ,
Nicolas B. Cowan ,
James Bushong ,
Heather Knutson ,
David Charbonneau ,
Drake Deming  and
Jason H. Steffen
Eric Agol
Affiliation:
Dept. of Astronomy, Box 351580, University of Washington, Seattle, WA 98195
Nicolas B. Cowan
Affiliation:
Dept. of Astronomy, Box 351580, University of Washington, Seattle, WA 98195
James Bushong
Affiliation:
Dept. of Astronomy, Box 351580, University of Washington, Seattle, WA 98195
Heather Knutson
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138
David Charbonneau
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138
Drake Deming
Affiliation:
NASA's Goddard Space Flight Center, Planetary Systems Laboratory, Code 693, Greenbelt, MD 20771, USA
Jason H. Steffen
Affiliation:
Fermilab Center for Particle Astrophysics, P.O. Box 500 MS 127, Batavia, IL 60510
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Abstract

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We present limits on transit timing variations and secondary eclipse depth variations at 8 microns with the Spitzer Space Telescope IRAC camera. Due to the weak limb darkening in the infrared and uninterrupted observing, Spitzer provides the highest accuracy transit times for this bright system, in principle providing sensitivity to secondary planets of Mars mass in resonant orbits. Finally, the transit data provides tighter constraints on the wavelength-dependent atmospheric absorption by the planet.

Information

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 4 , Symposium S253: Transiting Planets , May 2008 , pp. 209 - 215
Copyright
Copyright © International Astronomical Union 2009

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