Qatar-2:  A K Dwarf Orbited by a Transiting Hot Jupiter and a More Massive Companion in an Outer Orbit

M.L. Bryan; K.A. Alsubai; N.R. Parley; D.W. Latham; S.N. Quinn; J.A. Carter; B.J. Benjamin; P. Berlind; W.R. Brown; Uffe Gråe Jørgensen; Lars C. Astrup Buchhave

doi:10.1088/0004-637X/750/1/84

Qatar-2: A K Dwarf Orbited by a Transiting Hot Jupiter and a More Massive Companion in an Outer Orbit

M.L. Bryan, K.A. Alsubai, N.R. Parley, D.W. Latham, S.N. Quinn, J.A. Carter, B.J. Benjamin, P. Berlind, W.R. Brown, Uffe Gråe Jørgensen, Lars C. Astrup Buchhave

Astrofysik og Planetforskning

21 Citationer (Scopus)

Abstract

We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3mag 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.

Originalsprog	Engelsk
Tidsskrift	Astrophysical Journal
Vol/bind	750
Udgave nummer	1
Sider (fra-til)	84
ISSN	0004-637X
DOI	https://doi.org/10.1088/0004-637X/750/1/84
Status	Udgivet - 1 maj 2012

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10.1088/0004-637X/750/1/84

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title = "Qatar-2: A K Dwarf Orbited by a Transiting Hot Jupiter and a More Massive Companion in an Outer Orbit",

abstract = "We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3mag 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.",

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T2 - A K Dwarf Orbited by a Transiting Hot Jupiter and a More Massive Companion in an Outer Orbit

AU - Bryan, M.L.

AU - Alsubai, K.A.

AU - Parley, N.R.

AU - Latham, D.W.

AU - Quinn, S.N.

AU - Carter, J.A.

AU - Benjamin, B.J.

AU - Berlind, P.

AU - Brown, W.R.

AU - Jørgensen, Uffe Gråe

AU - Buchhave, Lars C. Astrup

PY - 2012/5/1

Y1 - 2012/5/1

N2 - We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3mag 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.

AB - We report the discovery and initial characterization of Qatar-2b, a hot Jupiter transiting a V = 13.3mag 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.

U2 - 10.1088/0004-637X/750/1/84

DO - 10.1088/0004-637X/750/1/84

M3 - Journal article

SN - 0004-637X

VL - 750

SP - 84

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Qatar-2: A K Dwarf Orbited by a Transiting Hot Jupiter and a More Massive Companion in an Outer Orbit

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