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Formation, Survival, and Detectability of Planets Beyond 100 AU

Veras, Dimitri and Crepp, Justin R. and Ford, Eric B. (2009) Formation, Survival, and Detectability of Planets Beyond 100 AU. Astrophysical Journal, 696 (2). pp. 1600-1611. ISSN 0004-637X.

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Direct imaging searches have begun to detect planetary and brown dwarf companions and to place constraints on the presence of giant planets at large separations from their host star. This work helps to motivate such planet searches by predicting a population of young giant planets that could be detectable by direct imaging campaigns. Both the classical core accretion and the gravitational instability model for planet formation are hard pressed to form long-period planets in situ. Here, we show that dynamical instabilities among planetary systems that originally formed multiple giant planets much closer to the host star could produce a population of giant planets at large (≈ 10^2-10^5 AU) separations. We estimate the limits within which these planets may survive, quantify the efficiency of gravitational scattering into both stable and unstable wide orbits, and demonstrate that population analyses must take into account the age of the system. We predict that planet scattering creates detectable giant planets on wide orbits that decreases in number on timescales of ~ 10 Myr. We demonstrate that several members of such populations should be detectable with current technology, quantify the prospects for future instruments, and suggest how they could place interesting constraints on planet formation models.

Item Type:Article
Related URLs:
URLURL TypeDescription
Veras, Dimitri0000-0001-8014-6162
Crepp, Justin R.0000-0003-0800-0593
Ford, Eric B.0000-0001-6545-639X
Additional Information:© 2009 The American Astronomical Society. Received 2008 December 16; accepted 2009 February 13; published 2009 April 27. We thank the anonymous referee for his keen observations, and Daniel Apai, John Chambers, Vacheslav Emel’yanenko, Daniel Fabrycky, Elizabeth Lada, Eduardo Martin, Michael Meyer, Ruth Murray-Clay, Steinn Sigurdsson, Jonathan Tan, and Scott Tremaine for sharing their insights. The authors acknowledge the University of Florida High-Performance Computing Center for providing computational resources and support that have contributed to the research results reported within this paper.
Funding AgencyGrant Number
University of FloridaUNSPECIFIED
Subject Keywords:celestial mechanics; methods: N-body simulations; open clusters and associations: general; planetary systems: formation; stars: imaging; techniques: high angular resolution
Issue or Number:2
Record Number:CaltechAUTHORS:20090826-091436022
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Official Citation:Formation, Survival, and Detectability of Planets Beyond 100 AU Dimitri Veras, Justin R. Crepp, and Eric B. Ford 2009 ApJ 696 1600-1611 doi: 10.1088/0004-637X/696/2/1600.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:15311
Deposited By: Tony Diaz
Deposited On:28 Aug 2009 15:44
Last Modified:09 Mar 2020 13:19

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