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Detectability of Exoplanet Periastron Passage in the Infrared

Kane, Stephen R. and Gelino, Dawn M. (2011) Detectability of Exoplanet Periastron Passage in the Infrared. Astrophysical Journal, 741 (1). Art. No. 52. ISSN 0004-637X.

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Characterization of exoplanets has matured in recent years, particularly through studies of exoplanetary atmospheres of transiting planets at infrared wavelengths. The primary source for such observations has been the Spitzer Space Telescope but these studies are anticipated to continue with the James Webb Space Telescope. A relatively unexplored region of exoplanet parameter space is the thermal detection of long-period eccentric planets during periastron passage. Here we describe the thermal properties and albedos of long-period giant planets along with the eccentricities of those orbits which allow them to remain within the habitable zone. We further apply these results to the known exoplanets by calculating temperatures and flux ratios for the IRAC passbands occupied by warm Spitzer, considering both low and high thermal redistribution efficiencies from the perspective of an observer. We conclude with recommendations on which targets are best suited for follow-up observations.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Kane, Stephen R.0000-0002-7084-0529
Gelino, Dawn M.0000-0003-1274-2784
Additional Information:© 2011 The American Astronomical Society. Received 2011 March 31; accepted 2011 August 5; published 2011 October 14. The authors thank Ian Crossfield, Gregory Laughlin, Nicolas Cowan, and Lisa Prato for several useful discussions. We also thank the anonymous referee, whose comments greatly improved the quality of the paper. This research has made use of the Exoplanet Orbit Database and the Exoplanet Data Explorer at
Group:Infrared Processing and Analysis Center (IPAC)
Subject Keywords:planetary systems; techniques: photometric
Issue or Number:1
Record Number:CaltechAUTHORS:20111206-154351285
Persistent URL:
Official Citation:Detectability of Exoplanet Periastron Passage in the Infrared Stephen R. Kane and Dawn M. Gelino 2011 ApJ 741 52
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28326
Deposited By: Ruth Sustaita
Deposited On:07 Dec 2011 15:36
Last Modified:03 Oct 2019 03:31

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