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dc.contributor.authorFeng, Fabo
dc.contributor.authorButler, R. Paul
dc.contributor.authorJones, Hugh R. A.
dc.contributor.authorPhillips, Mark W.
dc.contributor.authorVogt, Steven S.
dc.contributor.authorOppenheimer, Rebecca
dc.contributor.authorHolden, Bradford
dc.contributor.authorBoss, Alan P.
dc.date.accessioned2021-08-11T12:00:01Z
dc.date.available2021-08-11T12:00:01Z
dc.date.issued2021-08-03
dc.identifier.citationFeng , F , Butler , R P , Jones , H R A , Phillips , M W , Vogt , S S , Oppenheimer , R , Holden , B & Boss , A P 2021 , ' Optimized modeling of Gaia-Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low mass companions ' , Monthly Notices of the Royal Astronomical Society . https://doi.org/10.1093/mnras/stab2225
dc.identifier.issn0035-8711
dc.identifier.otherArXiv: http://arxiv.org/abs/2107.14056v1
dc.identifier.otherORCID: /0000-0001-6039-0555/work/98456334
dc.identifier.urihttp://hdl.handle.net/2299/24975
dc.description© 2021 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1093/mnras/stab2225
dc.description.abstractTo fully constrain the orbits of low mass circumstellar companions, we conduct combined analyses of the radial velocity data as well as the Gaia and Hipparcos astrometric data for eight nearby systems. Our study shows that companion-induced position and proper motion differences between Gaia and Hipparcos are significant enough to constrain orbits of low mass companions to a precision comparable with previous combined analyses of direct imaging and radial velocity data. We find that our method is robust to whether we use Gaia DR2 or Gaia EDR3, as well as whether we use all of the data, or just proper motion differences. In particular, we fully characterize the orbits of HD 190360 b and HD 16160 C for the first time. With a mass of 1.8$\pm$0.2$m_{\rm Jup}$ and an effective temperature of 123-176 K and orbiting around a Sun-like star, HD 190360 b is the smallest Jupiter-like planet with well-constrained mass and orbit, belonging to a small sample of fully characterized Jupiter analogs. It is separated from its primary star by 0.25$''$ and thus may be suitable for direct imaging by the CGI instrument of the Roman Space Telescope.en
dc.format.extent17
dc.format.extent2682341
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.subjectastro-ph.EP
dc.subjectastro-ph.SR
dc.titleOptimized modeling of Gaia-Hipparcos astrometry for the detection of the smallest cold Jupiter and confirmation of seven low mass companionsen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionCentre of Data Innovation Research
dc.contributor.institutionSchool of Physics, Engineering & Computer Science
dc.contributor.institutionDepartment of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1093/mnras/stab2225
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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