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Article: Galactic kinematics with RAVE data

TitleGalactic kinematics with RAVE data
Authors
KeywordsGalaxy: fundamental parameters
Galaxy: disk
Galaxy: kinematics and dynamics
Galaxy: structure
Stars: kinematics
Issue Date2008
Citation
Astronomy and Astrophysics, 2008, v. 480, n. 3, p. 753-765 How to Cite?
AbstractWe analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. The combination of photometric and 3D kinematic data allows us to disentangle and describe the vertical distribution of dwarfs, sub-giants and giants and their kinematics. We identify discontinuities within the kinematics and magnitude counts that separate the thin disk, thick disk and a hotter component. The respective scale heights of the thin disk and thick disk are 225 ± 10 pc and 1048 ± 36 pc. We also constrain the luminosity function and the kinematic distribution function. The existence of a kinematic gap between the thin and thick disks is incompatible with the thick disk having formed from the thin disk by a continuous process, such as scattering of stars by spiral arms or molecular clouds. Other mechanisms of formation of the thick disk such as "created on the spot" or smoothly "accreted" remain compatible with our findings. © 2008 ESO.
Persistent Identifierhttp://hdl.handle.net/10722/208878
ISSN
2014 Impact Factor: 4.378
2015 SCImago Journal Rankings: 2.446

 

DC FieldValueLanguage
dc.contributor.authorVeltz, L.-
dc.contributor.authorBienaymé, Olivier-
dc.contributor.authorFreeman, Kenneth C.-
dc.contributor.authorBinney, James J.-
dc.contributor.authorBland-Hawthorn, Joss Bland-
dc.contributor.authorGibson, Brad K.-
dc.contributor.authorGilmore, Gerard F.-
dc.contributor.authorGrebel, Eva K.-
dc.contributor.authorHelmi, Amina-
dc.contributor.authorMunari, Ulisse-
dc.contributor.authorNavarro, Julio F.-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorSeabroke, George M.-
dc.contributor.authorSiebert, Arnaud-
dc.contributor.authorSteinmetz, Matthias-
dc.contributor.authorWatson, Fred G.-
dc.contributor.authorWilliams, Mary E K-
dc.contributor.authorWyse, Rosemary F G-
dc.contributor.authorZwitter, Tomaž-
dc.date.accessioned2015-03-23T02:02:02Z-
dc.date.available2015-03-23T02:02:02Z-
dc.date.issued2008-
dc.identifier.citationAstronomy and Astrophysics, 2008, v. 480, n. 3, p. 753-765-
dc.identifier.issn0004-6361-
dc.identifier.urihttp://hdl.handle.net/10722/208878-
dc.description.abstractWe analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. The combination of photometric and 3D kinematic data allows us to disentangle and describe the vertical distribution of dwarfs, sub-giants and giants and their kinematics. We identify discontinuities within the kinematics and magnitude counts that separate the thin disk, thick disk and a hotter component. The respective scale heights of the thin disk and thick disk are 225 ± 10 pc and 1048 ± 36 pc. We also constrain the luminosity function and the kinematic distribution function. The existence of a kinematic gap between the thin and thick disks is incompatible with the thick disk having formed from the thin disk by a continuous process, such as scattering of stars by spiral arms or molecular clouds. Other mechanisms of formation of the thick disk such as "created on the spot" or smoothly "accreted" remain compatible with our findings. © 2008 ESO.-
dc.languageeng-
dc.relation.ispartofAstronomy and Astrophysics-
dc.subjectGalaxy: fundamental parameters-
dc.subjectGalaxy: disk-
dc.subjectGalaxy: kinematics and dynamics-
dc.subjectGalaxy: structure-
dc.subjectStars: kinematics-
dc.titleGalactic kinematics with RAVE data-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1051/0004-6361:20066948-
dc.identifier.scopuseid_2-s2.0-41449112982-
dc.identifier.volume480-
dc.identifier.issue3-
dc.identifier.spage753-
dc.identifier.epage765-
dc.identifier.eissn1432-0746-

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