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Implications of the Secondary Eclipse of Exoplanet HAT-P-11bWe observed exoplanet HAT-P-11b and have successfully detected its secondary eclipse. We conducted observations using the Spitzer Space Telescope in the post-cryo mission at 3.6 microns for a period of 22 hours centered on the anticipated secondary eclipse time, to detect the eclipse and determine its phase. Having detected the secondary eclipse, we are at present making a more focused series of observations in both the 3.6 and 4.5 micron bands to fully characterize it. HAT-P-11b is one of only two known exo-Neptunes and has a period of 4.8878 days, radius of 0.422 RJ, mass of 0.081 MJ and semi-major axis 0.053 AU. Measurements of the secondary eclipse will serve to clarify two key issues; 1) the planetary brightness temperature and the nature of its atmosphere, and 2) the eccentricity of its orbit, with implications for its dynamical evolution. We discuss implications of these observations.
Document ID
20100031191
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Barry, Richard K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Deming, L. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bakos, G.
Harrington, J.
Madhusudhan, N.
Noyes, R.
Seager, S.
Date Acquired
August 25, 2013
Publication Date
July 28, 2010
Subject Category
Astronomy
Meeting Information
Meeting: IAU Symposium 276: The Astrophysics of Planetary Systems
Location: Turin
Country: Italy
Start Date: October 9, 2010
End Date: October 17, 2010
Distribution Limits
Public
Copyright
Other

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