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- Publisher Website: 10.1093/mnras/stu2726
- Scopus: eid_2-s2.0-84930015092
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Article: The rich are different: evidence from the RAVE survey for stellar radial migration
Title | The rich are different: evidence from the RAVE survey for stellar radial migration |
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Authors | |
Keywords | Galaxy: abundances Galaxy: disc Galaxy: evolution Galaxy: kinematics and dynamics Galaxy: stellar content |
Issue Date | 2015 |
Publisher | Oxford 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? |
Abstract | Using 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 Identifier | http://hdl.handle.net/10722/211291 |
ISSN | 2023 Impact Factor: 4.7 2023 SCImago Journal Rankings: 1.621 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Kordopatis, G | - |
dc.contributor.author | Binney, J | - |
dc.contributor.author | Gilmore, G | - |
dc.contributor.author | Wyse, RFG | - |
dc.contributor.author | Belokurov, V | - |
dc.contributor.author | McMillan, PJ | - |
dc.contributor.author | Hatfield, P | - |
dc.contributor.author | Grebel, EK | - |
dc.contributor.author | Steinmetz, M | - |
dc.contributor.author | Navarro, JF | - |
dc.contributor.author | Seabroke, G | - |
dc.contributor.author | Minchev, I | - |
dc.contributor.author | Chiappini, C | - |
dc.contributor.author | Bienaymé, O | - |
dc.contributor.author | Bland-Hawthorn, J | - |
dc.contributor.author | Freeman, KC | - |
dc.contributor.author | Gibson, BK | - |
dc.contributor.author | Helmi, A | - |
dc.contributor.author | Munari, U | - |
dc.contributor.author | Parker, QA | - |
dc.contributor.author | Reid, WA | - |
dc.contributor.author | Siebert, A | - |
dc.contributor.author | Siviero, A | - |
dc.contributor.author | Zwitter, T | - |
dc.date.accessioned | 2015-07-08T03:24:14Z | - |
dc.date.available | 2015-07-08T03:24:14Z | - |
dc.date.issued | 2015 | - |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, 2015, v. 447, p. 3526-3535 | - |
dc.identifier.issn | 0035-8711 | - |
dc.identifier.uri | http://hdl.handle.net/10722/211291 | - |
dc.description.abstract | Using 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. | - |
dc.language | eng | - |
dc.publisher | Oxford University press. The Journal's web site is located at http://www.oxfordjournals.org/our_journals/mnras/ | - |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | - |
dc.subject | Galaxy: abundances | - |
dc.subject | Galaxy: disc | - |
dc.subject | Galaxy: evolution | - |
dc.subject | Galaxy: kinematics and dynamics | - |
dc.subject | Galaxy: stellar content | - |
dc.title | The rich are different: evidence from the RAVE survey for stellar radial migration | - |
dc.type | Article | - |
dc.identifier.email | Parker, QA: quentinp@hku.hk | - |
dc.identifier.authority | Parker, QA=rp02017 | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.doi | 10.1093/mnras/stu2726 | - |
dc.identifier.scopus | eid_2-s2.0-84930015092 | - |
dc.identifier.volume | 447 | - |
dc.identifier.spage | 3526 | - |
dc.identifier.epage | 3535 | - |
dc.identifier.isi | WOS:000350273400043 | - |
dc.identifier.issnl | 0035-8711 | - |