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Article: Kinematic groups beyond the solar neighbourhood with RAVE

TitleKinematic groups beyond the solar neighbourhood with RAVE
Authors
KeywordsGalaxy: evolution
Galaxy: kinematics and dynamics
Galaxy: structure
Solar neighbourhood
Issue Date2012
Citation
Monthly Notices of the Royal Astronomical Society: Letters, 2012, v. 426, n. 1, p. L1-L5 How to Cite?
AbstractWe analyse the kinematics of disc stars observed by the RAdial Velocity Experiment (RAVE) survey in and beyond the solar neighbourhood. We detect significant overdensities in the velocity distributions using a technique based on the wavelet transform. We find that the main local kinematic groups are large-scale features, surviving at least up to ~1 kpc from the Sun in the direction of antirotation, and also at ~700 pc below the Galactic plane. We also find that for regions located at different radii than the Sun, the known groups appear shifted in the vR-vφ velocity plane. For example, the Hercules group has a larger azimuthal velocity for regions inside the solar circle and a lower value outside. We have also discovered a newgroup at (U, V) = (92,-22) km s-1 in the solar neighbourhood and confirmed the significance of other previously found groups. Some of these trends detected for the first time are consistent with dynamical models of the effects of the bar and the spiral arms. More modelling is required to definitively characterize the non-axisymmetric components of our Galaxy using these groups. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/208962
ISSN

 

DC FieldValueLanguage
dc.contributor.authorAntoja, Teresa-
dc.contributor.authorHelmi, Amina-
dc.contributor.authorBienaymé, Olivier-
dc.contributor.authorBland-Hawthorn, Joss Bland-
dc.contributor.authorFamaey, Benoît-
dc.contributor.authorFreeman, Kenneth C.-
dc.contributor.authorGibson, Brad K.-
dc.contributor.authorGilmore, Gerard F.-
dc.contributor.authorGrebel, Eva K.-
dc.contributor.authorMinchev, Ivan-
dc.contributor.authorMunari, Ulisse-
dc.contributor.authorNavarro, Julio F.-
dc.contributor.authorParker, Quentin A.-
dc.contributor.authorReid, Warren A.-
dc.contributor.authorSeabroke, George M.-
dc.contributor.authorSiebert, Arnaud-
dc.contributor.authorSiviero, Alessandro-
dc.contributor.authorSteinmetz, Matthias-
dc.contributor.authorWilliams, Mary E K-
dc.contributor.authorWyse, Rosemary F G-
dc.contributor.authorZwitter, Tomaž-
dc.date.accessioned2015-03-23T02:02:22Z-
dc.date.available2015-03-23T02:02:22Z-
dc.date.issued2012-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society: Letters, 2012, v. 426, n. 1, p. L1-L5-
dc.identifier.issn1745-3925-
dc.identifier.urihttp://hdl.handle.net/10722/208962-
dc.description.abstractWe analyse the kinematics of disc stars observed by the RAdial Velocity Experiment (RAVE) survey in and beyond the solar neighbourhood. We detect significant overdensities in the velocity distributions using a technique based on the wavelet transform. We find that the main local kinematic groups are large-scale features, surviving at least up to ~1 kpc from the Sun in the direction of antirotation, and also at ~700 pc below the Galactic plane. We also find that for regions located at different radii than the Sun, the known groups appear shifted in the vR-vφ velocity plane. For example, the Hercules group has a larger azimuthal velocity for regions inside the solar circle and a lower value outside. We have also discovered a newgroup at (U, V) = (92,-22) km s-1 in the solar neighbourhood and confirmed the significance of other previously found groups. Some of these trends detected for the first time are consistent with dynamical models of the effects of the bar and the spiral arms. More modelling is required to definitively characterize the non-axisymmetric components of our Galaxy using these groups. © 2012 The Authors Monthly Notices of the Royal Astronomical Society © 2012 RAS.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society: Letters-
dc.subjectGalaxy: evolution-
dc.subjectGalaxy: kinematics and dynamics-
dc.subjectGalaxy: structure-
dc.subjectSolar neighbourhood-
dc.titleKinematic groups beyond the solar neighbourhood with RAVE-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1745-3933.2012.01310.x-
dc.identifier.scopuseid_2-s2.0-84873180020-
dc.identifier.volume426-
dc.identifier.issue1-
dc.identifier.spageL1-
dc.identifier.epageL5-
dc.identifier.eissn1745-3933-

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