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dc.contributor.author
Parisi, Maria Celeste
dc.contributor.author
Geisler, Doug
dc.contributor.author
Grocholski, A. J.
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Claria Olmedo, Juan Jose
dc.contributor.author
Sarajedini, A.
dc.date.available
2018-09-12T18:04:13Z
dc.date.issued
2015-03
dc.identifier.citation
Parisi, Maria Celeste; Geisler, Doug; Grocholski, A. J.; Claria Olmedo, Juan Jose; Sarajedini, A.; Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars; IOP Publishing; Astronomical Journal; 139; 3; 3-2015; 1168-1177
dc.identifier.issn
0004-6256
dc.identifier.uri
http://hdl.handle.net/11336/59345
dc.description.abstract
We have obtained metallicities of ∼360 red giant stars distributed in 15 Small Magellanic Cloud (SMC) fields from near-infrared spectra covering the Ca II triplet lines using the VLT + FORS2. The errors of the derived [Fe/H] values range from 0.09 to 0.35 dex per star, with a mean of 0.17 dex. The metallicity distribution (MD) of the whole sample shows a mean value of [Fe/H] = -1.00 ± 0.02, with a dispersion of 0.32 0.01, in agreement with global mean [Fe/H] values found in previous studies. We find no evidence of a metallicity gradient in the SMC. In fact, on analyzing the MD of each field, we derived mean values of [Fe/H] = -0.99 ± 0.08 and [Fe/H] = -1.02 ± 0.07 for fields located closer and farther than 4° from the center of the galaxy, respectively. In addition, there is a clear tendency for the field stars to be more metal-poor than the corresponding cluster they surround, independent of their positions in the galaxy and of the clusters' age. We argue that this most likely stems from the field stars being somewhat older and therefore somewhat more metal-poor than most of our clusters. © 2010. The American Astronomical Society.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
IOP Publishing
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Galaxies: Stellar Content
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Magellanic Clouds
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Stars: Abundances
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
dc.title
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-04T16:24:01Z
dc.journal.volume
139
dc.journal.number
3
dc.journal.pagination
1168-1177
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
dc.description.fil
Fil: Geisler, Doug. Universidad de Concepción; Chile
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Fil: Grocholski, A. J.. University of Florida; Estados Unidos. Space Telescope Science Institute; Estados Unidos
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Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
dc.description.fil
Fil: Sarajedini, A.. University of Florida; Estados Unidos
dc.journal.title
Astronomical Journal
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/139/3/1168/meta
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1088/0004-6256/139/3/1168
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