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The Broadband Infrared Emission Spectrum of the Exoplanet TrES-3

Fressin, Francois and Knutson, Heather A. and Charbonneau, David and O'Donovan, Francis T. and Burrows, Adam and Deming, Drake and Mandushev, Georgi and Spiegel, David (2010) The Broadband Infrared Emission Spectrum of the Exoplanet TrES-3. Astrophysical Journal, 711 (1). pp. 374-379. ISSN 0004-637X.

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We use the Spitzer Space Telescope to estimate the dayside thermal emission of the exoplanet TrES-3 integrated in the 3.6, 4.5, 5.8, and 8.0 μm bandpasses of the Infrared Array Camera (IRAC) instrument. We observe two secondary eclipses and find relative eclipse depths of 0.00346 ± 0.00035, 0.00372 ± 0.00054, 0.00449 ± 0.00097, and 0.00475 ± 0.00046, respectively, in the four IRAC bandpasses. We combine our results with the earlier K-band measurement of De Mooij et al., and compare them with models of the planetary emission. We find that the planet does not require the presence of an inversion layer in the high atmosphere. This is the first very strongly irradiated planet that does not have a temperature inversion, which indicates that stellar or planetary characteristics other than temperature have an important impact on temperature inversion. De Mooij & Snellen also detected a possible slight offset in the timing of the secondary eclipse in the K band. However, based on our four Spitzer channels, we place a 3σ upper limit of |ecos(ω)| < 0.0056, where e is the planet's orbital eccentricity and ω is the longitude of the periastron. This result strongly indicates that the orbit is circular, as expected from tidal circularization theory.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Knutson, Heather A.0000-0002-0822-3095
Charbonneau, David0000-0002-9003-484X
O'Donovan, Francis T.0000-0002-4858-6106
Burrows, Adam0000-0002-3099-5024
Deming, Drake0000-0001-5727-4094
Additional Information:Copyright is not claimed for this article. Received 2009 September 24; accepted 2010 January 11; published 2010 February 10. This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract to NASA.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:eclipses; infrared: stars; planetary systems; stars: individual (TrES-3); techniques: photometric
Issue or Number:1
Record Number:CaltechAUTHORS:20130129-132702403
Persistent URL:
Official Citation:The Broadband Infrared Emission Spectrum of the Exoplanet TrES-3 Francois Fressin et al. 2010 ApJ 711 374
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36656
Deposited By: Ruth Sustaita
Deposited On:29 Jan 2013 21:39
Last Modified:03 Oct 2019 04:40

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