On the metallicity of open clusters II. Spectroscopy
| dc.contributor.author | HEITER, U. | |
| hal.structure.identifier | M2A 2014 | |
| dc.contributor.author | SOUBIRAN, C. | |
| dc.contributor.author | NETOPIL, M. | |
| dc.contributor.author | PAUNZEN, E. | |
| dc.date.created | 2013-11-10 | |
| dc.date.issued | 2014 | |
| dc.identifier.issn | 0004-6361 | |
| dc.description.abstractEn | In a series of three papers, we investigate the current status of published metallicities for open clusters that were derived from a variety of photometric and spectroscopic methods. The current article focuses on spectroscopic methods. The aim is to compile a comprehensive set of clusters with the most reliable metallicities from high-resolution spectroscopic studies. This set of metallicities will be the basis for a calibration of metallicities from different methods. The literature was searched for [Fe/H] estimates of individual member stars of open clusters based on the analysis of high-resolution spectra. For comparison, we also compiled [Fe/H] estimates based on spectra with low and intermediate resolution. At medium and high resolution, we found that differences in the analysis methods have a stronger effect on metallicity than quality differences in the observations. We retained only highly probable cluster members and introduced a restriction on atmospheric parameters. We combined 641 individual metallicity values for 458 stars in 78 open clusters from 86 publications to form our final set of high-quality cluster metallicities. The photometric metallicities discussed in the first paper of this series are systematically lower than the spectroscopic ones by about 0.1 dex, and the differences show a scatter of about 0.2 dex. In a preliminary comparison of our spectroscopic sample with models of Galactic chemical evolution, none of the models predicts the observed radial metallicity gradient. Photometric metallicities show a large intrinsic dispersion, while the more accurate spectroscopic sample presented in this paper comprises fewer than half the number of clusters. Only a sophisticated combination of all available photometric and spectroscopic data will allow us to trace the metallicity distribution in the Galactic disk on a local and global scale. | |
| dc.language.iso | en | |
| dc.publisher | EDP Sciences | |
| dc.title.en | On the metallicity of open clusters II. Spectroscopy | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1051/0004-6361/201322559 | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
| dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Instrumentation et méthodes pour l'astrophysique [astro-ph.IM] | |
| dc.identifier.arxiv | 1311.2306 | |
| bordeaux.journal | Astronomy and Astrophysics - A&A | |
| bordeaux.page | id.A93 | |
| bordeaux.volume | 561 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00904009 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00904009v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2014&rft.volume=561&rft.spage=id.A93&rft.epage=id.A93&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=HEITER,%20U.&SOUBIRAN,%20C.&NETOPIL,%20M.&PAUNZEN,%20E.&rft.genre=article |
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