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QATAR-2 : a K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit
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(2012) QATAR-2 : a K dwarf orbited by a transiting hot Jupiter and a more massive companion in an outer orbit. The Astrophysical Journal, Volume 750 (Number 1). Article number 84. doi:10.1088/0004-637X/750/1/84 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/750/1/84
Abstract
We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3 mag K dwarf in a circular orbit with a short period, P b = 1.34 days. The mass and radius of Qatar-2b are M P = 2.49 M J and R P = 1.14 R J, respectively. Radial-velocity monitoring of Qatar-2 over a span of 153 days revealed the presence of a second companion in an outer orbit. The Systemic Console yielded plausible orbits for the outer companion, with periods on the order of a year and a companion mass of at least several M J. Thus, Qatar-2 joins the short but growing list of systems with a transiting hot Jupiter and an outer companion with a much longer period. This system architecture is in sharp contrast to that found by Kepler for multi-transiting systems, which are dominated by objects smaller than Neptune, usually with tightly spaced orbits that must be nearly coplanar.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
Journal or Publication Title: | The Astrophysical Journal | ||||
Publisher: | Institute of Physics Publishing, Inc. | ||||
ISSN: | 0004-637X | ||||
Official Date: | 1 May 2012 | ||||
Dates: |
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Volume: | Volume 750 | ||||
Number: | Number 1 | ||||
Article Number: | Article number 84 | ||||
DOI: | 10.1088/0004-637X/750/1/84 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
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