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dc.contributor.authorWang, Y.
dc.contributor.authorSmart, R. L.
dc.contributor.authorShao, Z.
dc.contributor.authorJones, H. R. A
dc.contributor.authorMarocco, F.
dc.contributor.authorLuo, A.
dc.contributor.authorBurgasser, A.
dc.contributor.authorZhong, J.
dc.contributor.authorDu, B.
dc.date.accessioned2019-02-20T15:55:06Z
dc.date.available2019-02-20T15:55:06Z
dc.date.issued2018-05-14
dc.identifier.citationWang , Y , Smart , R L , Shao , Z , Jones , H R A , Marocco , F , Luo , A , Burgasser , A , Zhong , J & Du , B 2018 , ' A focus on L dwarfs with trigonometric parallaxes ' , Publications of the Astronomical Society of the Pacific , vol. 130 , no. 988 , pp. 1-9 . https://doi.org/10.1088/1538-3873/aaacc5
dc.identifier.issn0004-6280
dc.identifier.otherPURE: 13565288
dc.identifier.otherPURE UUID: 264bc606-e971-4a90-af2b-e7b4e1567c85
dc.identifier.otherArXiv: http://arxiv.org/abs/1802.02320v1
dc.identifier.otherScopus: 85049081361
dc.identifier.urihttp://hdl.handle.net/2299/21123
dc.descriptionThis is an author-created, un-copyedited version of an article published in Publications of the Astronomical Society of the Pacific. Under embargo until 14 May 2019. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1538-3873/aaacc5.
dc.description.abstractWe report new parallax measurements for ten L and early T type dwarfs, five of which have no previous published values, using observations over 3 years at the robotic Liverpool Telescope. The resulting parallaxes and proper motions have median errors of 2\,mas and 1.5\,mas/year respectively. Their space motions indicate they are all Galactic disk members. We combined this sample with other objects with astrometry from the Liverpool Telescope and with published literature astrometry to construct a sample of 260 L and early T type dwarfs with measured parallaxes, designated the Astrometry Sample. We study the kinematics of the Astrometry Sample, and derived a solar motion of $(U,V,W)_{\bigodot} = (7.9\pm1.7,13.2\pm1.2,7.2\pm1.0)$\,\kms~ with respect to the local standard of rest, in agreement with recent literature. We derive a kinematic age of 1.5-1.7\,Gyr for the Astrometry Sample assuming the age increases monotonically with the total velocity for a given disk sample. This kinematic age is less than half literature values for other low mass dwarf samples. We believe this difference arises for two reasons (1) the sample is mainly composed of mid to late L dwarfs which are expected to be relatively young and (2) the requirement that objects have a measured parallax biases the sample to the brighter examples which tend to be younger.en
dc.format.extent9
dc.language.isoeng
dc.relation.ispartofPublications of the Astronomical Society of the Pacific
dc.rights/dk/atira/pure/core/openaccesspermission/embargoed
dc.subjectastro-ph.SR
dc.titleA focus on L dwarfs with trigonometric parallaxesen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Computer Science
dc.contributor.institutionCentre of Data Innovation Research
dc.description.statusPeer reviewed
dc.date.embargoedUntil2019-05-14
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.relation.schoolSchool of Computer Science
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2018-02-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1088/1538-3873/aaacc5
rioxxterms.licenseref.startdate2019-05-14+01:00
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.date.embargo2019-05-14+01:00
herts.rights.accesstypeembargoedAccess


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