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Planetary Phase Variations of the 55 Cancri System

Kane, Stephen R. and Gelino, Dawn M. and Ciardi, David R. and Dragomir, Diana and von Braun, Kaspar (2011) Planetary Phase Variations of the 55 Cancri System. Astrophysical Journal, 740 (2). Art. No. 61. ISSN 0004-637X.

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Characterization of the composition, surface properties, and atmospheric conditions of exoplanets is a rapidly progressing field as the data to study such aspects become more accessible. Bright targets, such as the multi-planet 55 Cancri system, allow an opportunity to achieve high signal-to-noise for the detection of photometric phase variations to constrain the planetary albedos. The recent discovery that innermost planet, 55 Cancri e, transits the host star introduces new prospects for studying this system. Here we calculate photometric phase curves at optical wavelengths for the system with varying assumptions for the surface and atmospheric properties of 55 Cancri e. We show that the large differences in geometric albedo allows one to distinguish between various surface models, that the scattering phase function cannot be constrained with foreseeable data, and that planet b will contribute significantly to the phase variation, depending upon the surface of planet e. We discuss detection limits and how these models may be used with future instrumentation to further characterize these planets and distinguish between various assumptions regarding surface conditions.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Kane, Stephen R.0000-0002-7084-0529
Gelino, Dawn M.0000-0003-1274-2784
Ciardi, David R.0000-0002-5741-3047
Dragomir, Diana0000-0003-2313-467X
Additional Information:© 2011 The American Astronomical Society. Received 2011 May 6; accepted 2011 July 21; published 2011 September 29. The authors thank Alan Boss for insightful discussions as well as Brice-Olivier Demory and Joshua Winn for their useful inputs. We thank the anonymous referee, whose comments greatly improved the quality of the paper.
Group:Infrared Processing and Analysis Center (IPAC)
Subject Keywords:planetary systems; stars: individual (55 Cancri); techniques: photometric
Record Number:CaltechAUTHORS:20111206-153204351
Persistent URL:
Official Citation:Planetary Phase Variations of the 55 Cancri System Stephen R. Kane et al. 2011 ApJ 740 61
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28325
Deposited By: Ruth Sustaita
Deposited On:06 Dec 2011 23:43
Last Modified:14 Nov 2017 19:28

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