File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
  • Find via Find It@HKUL
Supplementary

Article: The rich are different: evidence from the RAVE survey for stellar radial migration

TitleThe rich are different: evidence from the RAVE survey for stellar radial migration
Authors
KeywordsGalaxy: abundances
Galaxy: disc
Galaxy: evolution
Galaxy: kinematics and dynamics
Galaxy: stellar content
Issue Date2015
PublisherOxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/
Citation
Monthly Notices of the Royal Astronomical Society, 2015, v. 447, p. 3526-3535 How to Cite?
AbstractUsing the RAdial Velocity Experiment fourth data release (RAVE DR4), and a new metallicity calibration that will be also taken into account in the future RAVE DR5, we investigate the existence and the properties of supersolar metallicity stars ([M/H] ≳ +0.1 dex) in the sample, and in particular in the solar neighbourhood. We find that RAVE is rich in supersolar metallicity stars, and that the local metallicity distribution function declines remarkably slowly up to +0.4 dex. Our results show that the kinematics and height distributions of the supersolar metallicity stars are identical to those of the [M/H] ≲ 0 thin-disc giants that we presume were locally manufactured. The eccentricities of the supersolar metallicity stars indicate that half of them are on a roughly circular orbit (e <= 0.15), so under the assumption that the metallicity of the interstellar medium at a given radius never decreases with time, they must have increased their angular momenta by scattering at corotation resonances of spiral arms from regions far inside the solar annulus. The likelihood that a star will migrate radially does not seem to decrease significantly with increasing amplitude of vertical oscillations within range of oscillation amplitudes encountered in the disc.
Persistent Identifierhttp://hdl.handle.net/10722/211291
ISSN
2015 Impact Factor: 4.952
2015 SCImago Journal Rankings: 2.806

 

DC FieldValueLanguage
dc.contributor.authorKordopatis, G-
dc.contributor.authorBinney, J-
dc.contributor.authorGilmore, G-
dc.contributor.authorWyse, RFG-
dc.contributor.authorBelokurov, V-
dc.contributor.authorMcMillan, PJ-
dc.contributor.authorHatfield, P-
dc.contributor.authorGrebel, EK-
dc.contributor.authorSteinmetz, M-
dc.contributor.authorNavarro, JF-
dc.contributor.authorSeabroke, G-
dc.contributor.authorMinchev, I-
dc.contributor.authorChiappini, C-
dc.contributor.authorBienaymé, O-
dc.contributor.authorBland-Hawthorn, J-
dc.contributor.authorFreeman, KC-
dc.contributor.authorGibson, BK-
dc.contributor.authorHelmi, A-
dc.contributor.authorMunari, U-
dc.contributor.authorParker, QA-
dc.contributor.authorReid, WA-
dc.contributor.authorSiebert, A-
dc.contributor.authorSiviero, A-
dc.contributor.authorZwitter, T-
dc.date.accessioned2015-07-08T03:24:14Z-
dc.date.available2015-07-08T03:24:14Z-
dc.date.issued2015-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2015, v. 447, p. 3526-3535-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/211291-
dc.description.abstractUsing the RAdial Velocity Experiment fourth data release (RAVE DR4), and a new metallicity calibration that will be also taken into account in the future RAVE DR5, we investigate the existence and the properties of supersolar metallicity stars ([M/H] &gsim; +0.1 dex) in the sample, and in particular in the solar neighbourhood. We find that RAVE is rich in supersolar metallicity stars, and that the local metallicity distribution function declines remarkably slowly up to +0.4 dex. Our results show that the kinematics and height distributions of the supersolar metallicity stars are identical to those of the [M/H] &lsim; 0 thin-disc giants that we presume were locally manufactured. The eccentricities of the supersolar metallicity stars indicate that half of them are on a roughly circular orbit (e <= 0.15), so under the assumption that the metallicity of the interstellar medium at a given radius never decreases with time, they must have increased their angular momenta by scattering at corotation resonances of spiral arms from regions far inside the solar annulus. The likelihood that a star will migrate radially does not seem to decrease significantly with increasing amplitude of vertical oscillations within range of oscillation amplitudes encountered in the disc.-
dc.languageeng-
dc.publisherOxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.subjectGalaxy: abundances-
dc.subjectGalaxy: disc-
dc.subjectGalaxy: evolution-
dc.subjectGalaxy: kinematics and dynamics-
dc.subjectGalaxy: stellar content-
dc.titleThe rich are different: evidence from the RAVE survey for stellar radial migration-
dc.typeArticle-
dc.identifier.emailParker, QA: quentinp@hku.hk-
dc.identifier.authorityParker, QA=rp02017-
dc.identifier.volume447-
dc.identifier.spage3526-
dc.identifier.epage3535-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats