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Distinguishing between stellar and planetary companions with phase monitoring

Kane, Stephen R. and Gelino, Dawn M. (2012) Distinguishing between stellar and planetary companions with phase monitoring. Monthly Notices of the Royal Astronomical Society, 424 (1). pp. 779-788. ISSN 0035-8711. doi:10.1111/j.1365-2966.2012.21265.x.

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Exoplanets which are detected using the radial velocity technique have a well-known ambiguity of their true mass, caused by the unknown inclination of the planetary orbit with respect to the plane of the sky. Constraints on the inclination are aided by astrometric follow-up in rare cases or, in ideal situations, through subsequent detection of a planetary transit. As the predicted inclination decreases, the mass of the companion increases leading to a change in the predicted properties. Here we investigate the changes in the mass, radius and atmospheric properties as the inclination pushes the companion from the planetary into the brown dwarf and finally low-mass star regimes. We determine the resulting detectable photometric signatures in the predicted phase variation as the companion changes properties and becomes self-luminous. We apply this to the HD 114762 and HD 162020 systems for which the minimum masses of the known companions place them at the deuterium-burning limit.

Item Type:Article
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URLURL TypeDescription Paper
Kane, Stephen R.0000-0002-7084-0529
Gelino, Dawn M.0000-0003-1274-2784
Additional Information:© 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS. Accepted 2012 May 8. Received 2012 May 8; in original form 2012 March 24. Article first published online: 1 Jun. 2012. The authors would like to thank Davy Kirkpatrick, John Stauffer, David Ciardi and William Welsh for several useful discussions. We would also like to thank the anonymous referee whose comments greatly improved the quality of the paper. This research has made use of the NASA Exoplanet Database, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Issue or Number:1
Record Number:CaltechAUTHORS:20120618-132839187
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Official Citation:Stephen R. Kane and Dawn M. Gelino Distinguishing between stellar and planetary companions with phase monitoring MNRAS (2012) Vol. 424 779-788 doi:10.1111/j.1365-2966.2012.21265.x First published online July 21, 2012
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31937
Deposited By: Tony Diaz
Deposited On:20 Jun 2012 21:09
Last Modified:09 Nov 2021 20:02

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