Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars
- Autores
- Parisi, Maria Celeste; Geisler, Doug; Grocholski, A. J.; Claria Olmedo, Juan Jose; Sarajedini, A.
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- 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.
Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Geisler, Doug. Universidad de Concepción; Chile
Fil: Grocholski, A. J.. University of Florida; Estados Unidos. Space Telescope Science Institute; Estados Unidos
Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina
Fil: Sarajedini, A.. University of Florida; Estados Unidos - Materia
-
GALAXIES: STELLAR CONTENT
MAGELLANIC CLOUDS
STARS: ABUNDANCES - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
.jpg)
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/59345
Ver los metadatos del registro completo
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Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field starsParisi, Maria CelesteGeisler, DougGrocholski, A. J.Claria Olmedo, Juan JoseSarajedini, A.GALAXIES: STELLAR CONTENTMAGELLANIC CLOUDSSTARS: ABUNDANCEShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We 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.Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Geisler, Doug. Universidad de Concepción; ChileFil: Grocholski, A. J.. University of Florida; Estados Unidos. Space Telescope Science Institute; Estados UnidosFil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; ArgentinaFil: Sarajedini, A.. University of Florida; Estados UnidosIOP Publishing2015-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/59345Parisi, 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; 1168-11770004-6256CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/139/3/1168/metainfo:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/139/3/1168info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:33:51Zoai:ri.conicet.gov.ar:11336/59345instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:33:51.87CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
| dc.title.none.fl_str_mv |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| title |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| spellingShingle |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars Parisi, Maria Celeste GALAXIES: STELLAR CONTENT MAGELLANIC CLOUDS STARS: ABUNDANCES |
| title_short |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| title_full |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| title_fullStr |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| title_full_unstemmed |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| title_sort |
Ca II triplet spectroscopy of small magellanic cloud red giants. II. abundances for a sample of field stars |
| dc.creator.none.fl_str_mv |
Parisi, Maria Celeste Geisler, Doug Grocholski, A. J. Claria Olmedo, Juan Jose Sarajedini, A. |
| author |
Parisi, Maria Celeste |
| author_facet |
Parisi, Maria Celeste Geisler, Doug Grocholski, A. J. Claria Olmedo, Juan Jose Sarajedini, A. |
| author_role |
author |
| author2 |
Geisler, Doug Grocholski, A. J. Claria Olmedo, Juan Jose Sarajedini, A. |
| author2_role |
author author author author |
| dc.subject.none.fl_str_mv |
GALAXIES: STELLAR CONTENT MAGELLANIC CLOUDS STARS: ABUNDANCES |
| topic |
GALAXIES: STELLAR CONTENT MAGELLANIC CLOUDS STARS: ABUNDANCES |
| purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
| dc.description.none.fl_txt_mv |
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. Fil: Parisi, Maria Celeste. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Geisler, Doug. Universidad de Concepción; Chile Fil: Grocholski, A. J.. University of Florida; Estados Unidos. Space Telescope Science Institute; Estados Unidos Fil: Claria Olmedo, Juan Jose. Universidad Nacional de Cordoba. Observatorio Astronomico de Cordoba; Argentina Fil: Sarajedini, A.. University of Florida; Estados Unidos |
| description |
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. |
| publishDate |
2015 |
| dc.date.none.fl_str_mv |
2015-03 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/59345 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 0004-6256 CONICET Digital CONICET |
| url |
http://hdl.handle.net/11336/59345 |
| identifier_str_mv |
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 0004-6256 CONICET Digital CONICET |
| dc.language.none.fl_str_mv |
eng |
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eng |
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info:eu-repo/semantics/altIdentifier/url/http://iopscience.iop.org/article/10.1088/0004-6256/139/3/1168/meta info:eu-repo/semantics/altIdentifier/doi/10.1088/0004-6256/139/3/1168 |
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info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
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openAccess |
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https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
| dc.format.none.fl_str_mv |
application/pdf application/pdf |
| dc.publisher.none.fl_str_mv |
IOP Publishing |
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IOP Publishing |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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