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dc.contributor.authorMcGill, Pen
dc.contributor.authorSmith, Leigh Charlesen
dc.contributor.authorEvans, Wynen
dc.contributor.authorBelokurov, Vasilyen
dc.contributor.authorSmart, RLen
dc.date.accessioned2018-11-12T16:31:38Z
dc.date.available2018-11-12T16:31:38Z
dc.date.issued2018-07-01en
dc.identifier.issn1745-3925
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/284938
dc.description.abstract© 2018 The Author(s). We used the Tycho-Gaia Astrometric Solution catalogue, part of Gaia Data Release 1, to search for candidate astrometric microlensing events expected to occur within the remaining lifetime of the Gaia satellite. Our search yielded one promising candidate. We predict that the nearby DQ type white dwarf LAWD 37 (WD 1142-645) will lens a background star and will reach closest approach on 2019 November 11 (±4 d) with impact parameter 380 ± 10 mas. This will produce an apparent maximum deviation of the source position of 2.8 ± 0.1 mas. In the most propitious circumstance, Gaia will be able to determine the mass of LAWD 37 to ∼3 per cent. This mass determination will provide an independent check on atmospheric models of white dwarfs with helium rich atmospheres, as well as tests of white dwarf mass radius relationships and evolutionary theory.
dc.titleA predicted astrometric microlensing event by a nearby white dwarfen
dc.typeArticle
prism.endingPageL33
prism.issueIdentifier1en
prism.publicationDate2018en
prism.publicationNameMonthly Notices of the Royal Astronomical Society: Lettersen
prism.startingPageL29
prism.volume478en
dc.identifier.doi10.17863/CAM.32309
dcterms.dateAccepted2018-04-17en
rioxxterms.versionofrecord10.1093/mnrasl/sly066en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2018-07-01en
dc.contributor.orcidSmith, Leigh Charles [0000-0002-3259-2771]
dc.contributor.orcidEvans, Wyn [0000-0002-5981-7360]
dc.contributor.orcidBelokurov, Vasily [0000-0002-0038-9584]
dc.identifier.eissn1745-3933
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSCIENCE & TECHNOLOGY FACILITIES COUNCIL (ST/N000927/1)


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