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dc.contributor.authorKordopatis, Georgespt_BR
dc.contributor.authorWyse, Rosemary F.G.pt_BR
dc.contributor.authorChiappini, C.C.M.pt_BR
dc.contributor.authorMinchev, Ivanpt_BR
dc.contributor.authorAnders, Friedrichpt_BR
dc.contributor.authorSantiago, Basilio Xavierpt_BR
dc.date.accessioned2017-06-20T02:30:27Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn0035-8711pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/159674pt_BR
dc.description.abstractCorrelations between stellar chemistry and kinematics have long been used to gain insight into the evolution of the Milky Way Galaxy. Orbital angular momentum is a key physical parameter and it is often estimated from three-dimensional space motions.We here demonstrate the lower uncertainties that can be achieved in the estimation of one component of velocity through selection of stars in key directions and use of line-of-sight velocity alone (i.e. without incorporation of proper motion data). In this first paper, we apply our technique to stars observed in the direction of Galactic rotation in the APOGEE (Apache Point Observatory Galactic Evolution Experiment) survey.We first derive the distribution of azimuthal velocities, vφ, then from these and observed radial coordinates, estimate the stellar guiding centre radii, Rg, within 6.9 ≤ R ≤ 10 kpc with uncertainties smaller than (or of the order of) 1 kpc. We show that there is no simple way to select a clean stellar sample based on low errors on proper motions and distances to obtain high-quality 3D velocities and hence one should pay particular attention when trying to identify kinematically peculiar stars based on velocities derived using the proper motions. Using our vφ estimations, we investigate the joint distribution of elemental abundances and rotational kinematics free from the blurring effects of epicyclic motions, and we derive the ∂vφ/∂[α/Fe] and ∂vφ/∂[Fe/H] trends for the thin and thick discs as a function of radius. Our analysis provides further evidence for radial migration within the thin disc and hints against radial migration playing a significant role in the evolution of the thick disc.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofMonthly notices of the Royal Astronomical Society. Oxford. Vol. 467, no. 1 (May 2017), p. 469–489pt_BR
dc.rightsOpen Accessen
dc.subjectGalaxy abundancesen
dc.subjectPopulacoes estelarespt_BR
dc.subjectGalaxy discen
dc.subjectMetalicidadept_BR
dc.subjectCinemáticapt_BR
dc.subjectGalaxy evolutionen
dc.subjectGalaxy kinematics and dynamicsen
dc.subjectGalaxy stellar contenten
dc.titleCardinal kinematics – I. : rotation fields of the APOGEE surveypt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001022273pt_BR
dc.type.originEstrangeiropt_BR


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