File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Detection of a radial velocity gradient in the extended local disc with RAVE

TitleDetection of a radial velocity gradient in the extended local disc with RAVE
Authors
KeywordsGalaxy: kinematics and dynamics
Stars: kinematics and dynamics
Galaxy: fundamental parameters
Issue Date2011
Citation
Monthly Notices of the Royal Astronomical Society, 2011, v. 412, n. 3, p. 2026-2032 How to Cite?
AbstractUsing a sample of 213713 stars from the Radial Velocity Experiment (RAVE) survey, limited to a distance of 2kpc from the Sun and to |z| < 1kpc, we report the detection of a velocity gradient of disc stars in the fourth quadrant, directed radially from the Galactic Centre. In the direction of the Galactic Centre, we apply a simple method independent of stellar proper motions and of Galactic parameters to assess the existence of this gradient in the RAVE data. This velocity gradient corresponds to |K+C| > rsim 3 km s-1 kpc-1, where K and C are the Oort constants measuring the local divergence and radial shear of the velocity field, respectively. In order to illustrate the effect, assuming a zero radial velocity of the local standard of rest we then reconstruct the two-dimensional Galactocentric velocity maps using two different sets of proper motions and photometric distances based either on isochrone fitting or on K-band magnitudes, and considering two sets of values for the Galactocentric radius of the Sun and local circular speed. Further observational confirmation of our finding with line-of-sight velocities of stars at low latitudes, together with further modelling, should help constrain the non-axisymmetric components of the Galactic potential, including the bar, the spiral arms and possibly the ellipticity of the dark halo. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.
Persistent Identifierhttp://hdl.handle.net/10722/209000
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorSiebert, Arnaud-
dc.contributor.authorFamaey, Benoît-
dc.contributor.authorMinchev, Ivan-
dc.contributor.authorSeabroke, George M.-
dc.contributor.authorBinney, James J.-
dc.contributor.authorBurnett, Benedict C M-
dc.contributor.authorFreeman, Kenneth C.-
dc.contributor.authorWilliams, Mary E K-
dc.contributor.authorBienaymé, Olivier-
dc.contributor.authorBland-Hawthorn, Joss Bland-
dc.contributor.authorCampbell, Randy D.-
dc.contributor.authorFulbright, Jon P.-
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.authorReid, Warren A.-
dc.contributor.authorSiviero, Alessandro-
dc.contributor.authorSteinmetz, Matthias-
dc.contributor.authorWatson, Fred G.-
dc.contributor.authorWyse, Rosemary F G-
dc.contributor.authorZwitter, Tomaž-
dc.date.accessioned2015-03-23T02:02:30Z-
dc.date.available2015-03-23T02:02:30Z-
dc.date.issued2011-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2011, v. 412, n. 3, p. 2026-2032-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/209000-
dc.description.abstractUsing a sample of 213713 stars from the Radial Velocity Experiment (RAVE) survey, limited to a distance of 2kpc from the Sun and to |z| < 1kpc, we report the detection of a velocity gradient of disc stars in the fourth quadrant, directed radially from the Galactic Centre. In the direction of the Galactic Centre, we apply a simple method independent of stellar proper motions and of Galactic parameters to assess the existence of this gradient in the RAVE data. This velocity gradient corresponds to |K+C| > rsim 3 km s-1 kpc-1, where K and C are the Oort constants measuring the local divergence and radial shear of the velocity field, respectively. In order to illustrate the effect, assuming a zero radial velocity of the local standard of rest we then reconstruct the two-dimensional Galactocentric velocity maps using two different sets of proper motions and photometric distances based either on isochrone fitting or on K-band magnitudes, and considering two sets of values for the Galactocentric radius of the Sun and local circular speed. Further observational confirmation of our finding with line-of-sight velocities of stars at low latitudes, together with further modelling, should help constrain the non-axisymmetric components of the Galactic potential, including the bar, the spiral arms and possibly the ellipticity of the dark halo. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS.-
dc.languageeng-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectGalaxy: kinematics and dynamics-
dc.subjectStars: kinematics and dynamics-
dc.subjectGalaxy: fundamental parameters-
dc.titleDetection of a radial velocity gradient in the extended local disc with RAVE-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1111/j.1365-2966.2010.18037.x-
dc.identifier.scopuseid_2-s2.0-79953312254-
dc.identifier.volume412-
dc.identifier.issue3-
dc.identifier.spage2026-
dc.identifier.epage2032-
dc.identifier.eissn1365-2966-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats