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dc.contributor.authorJones, H.R.A.
dc.contributor.authorButler, R.P.
dc.contributor.authorTinney, C.G.
dc.contributor.authorMarcy, G.W.
dc.contributor.authorCarter, B.D.
dc.contributor.authorPenny, A.J.
dc.contributor.authorMcCarthy, C.
dc.contributor.authorBailey, J.
dc.date.accessioned2007-07-08T20:22:19Z
dc.date.available2007-07-08T20:22:19Z
dc.date.issued2006
dc.identifier.citationJones , H R A , Butler , R P , Tinney , C G , Marcy , G W , Carter , B D , Penny , A J , McCarthy , C & Bailey , J 2006 , ' High-eccentricity planets from the Anglo-Australian planet search ' , Monthly Notices of the Royal Astronomical Society , vol. 369 , no. 1 , pp. 249-256 .
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 172605
dc.identifier.otherPURE UUID: fc2da140-130b-4c25-9b9a-14f16c858453
dc.identifier.otherdspace: 2299/179
dc.identifier.otherScopus: 33745263905
dc.identifier.urihttp://hdl.handle.net/2299/179
dc.descriptionThe definitive version is available at www.blackwell-synergy.com--Copyright Blackwell Publishing
dc.description.abstractWe report Doppler measurements of the stars HD 187085 and HD 20782 which indi- cate two high eccentricity low-mass companions to the stars. We find HD 187085 has a Jupiter-mass companion with a 1000 d orbit. Our formal ‘best fit’ solution suggests an eccentricity of 0.47, however, it does not sample the periastron passage of the com- panion and we find that orbital solutions with eccentricities between 0.1 and 0.8 give only slightly poorer fits (based on RMS and 2 ) and are thus plausible. Observations made during periastron passage in 2007 June should allow for the reliable determi- nation of the orbital eccentricity for the companion to HD 187085. Our dataset for HD 20782 does sample periastron and so the orbit for its companion can be more reli- ably determined. We find the companion to HD 20782 has M sin i = 1.77±0.22 MJup, an orbital period of 595.86±0.03 d and an orbit with an eccentricity of 0.92±0.03. The detection of such high-eccentricity (and relatively low velocity amplitude) exoplanets appears to be facilitated by the long-term precision of the Anglo-Australian Planet Search. Looking at exoplanet detections as a whole, we find that those with higher eccentricity seem to have relatively higher velocity amplitudes indicating higher mass planets and/or an observational bias against the detection of high eccentricity systems.en
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.titleHigh-eccentricity planets from the Anglo-Australian planet searchen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dcterms.dateAccepted2006
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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