Detection of a Diffuse Extended Halo-like Structure around 47 Tuc

Autores
Piatti, Andres Eduardo
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We constructed for the first time a stellar density profile of 47 Tucanae (47 Tuc) out of ∼5.5 times its tidal radius (r t) using high-quality deep BV photometry. After carefully considering the influence of photometric errors, and Milky Way and Small Magellanic Cloud composite stellar population contamination, we found that the cluster stellar density profile reaches a nearly constant value from ∼1.7r t outward, which does not depend on the direction from the cluster's center considered. These results visibly contrast with recent distinct theoretical predictions on the existence of tidal tails or on a density profile that falls as at large distances, and with observational outcomes of a clumpy structure as well. Our results suggest that the envelope of 47 Tuc is a halo-like, nearly constant low-density structure.
Fil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
Materia
GLOBULAR CLUSTERS: INDIVIDUAL (47 TUCANAE)
TECHNIQUES: PHOTOMETRIC
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/76875
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Detection of a Diffuse Extended Halo-like Structure around 47 TucPiatti, Andres EduardoGLOBULAR CLUSTERS: INDIVIDUAL (47 TUCANAE)TECHNIQUES: PHOTOMETRICWe constructed for the first time a stellar density profile of 47 Tucanae (47 Tuc) out of ∼5.5 times its tidal radius (r t) using high-quality deep BV photometry. After carefully considering the influence of photometric errors, and Milky Way and Small Magellanic Cloud composite stellar population contamination, we found that the cluster stellar density profile reaches a nearly constant value from ∼1.7r t outward, which does not depend on the direction from the cluster's center considered. These results visibly contrast with recent distinct theoretical predictions on the existence of tidal tails or on a density profile that falls as at large distances, and with observational outcomes of a clumpy structure as well. Our results suggest that the envelope of 47 Tuc is a halo-like, nearly constant low-density structure.Fil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaInstitute of Physics Publishing2017-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/76875Piatti, Andres Eduardo; Detection of a Diffuse Extended Halo-like Structure around 47 Tuc; Institute of Physics Publishing; Astrophysical Journal Letters; 846; 1; 9-20172041-82130004-637XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/2041-8213/aa8773info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/aa8773info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T12:01:05Zoai:ri.conicet.gov.ar:11336/76875instacron: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:34982025-10-22 12:01:05.321CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
title Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
spellingShingle Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
Piatti, Andres Eduardo
GLOBULAR CLUSTERS: INDIVIDUAL (47 TUCANAE)
TECHNIQUES: PHOTOMETRIC
title_short Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
title_full Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
title_fullStr Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
title_full_unstemmed Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
title_sort Detection of a Diffuse Extended Halo-like Structure around 47 Tuc
dc.creator.none.fl_str_mv Piatti, Andres Eduardo
author Piatti, Andres Eduardo
author_facet Piatti, Andres Eduardo
author_role author
dc.subject.none.fl_str_mv GLOBULAR CLUSTERS: INDIVIDUAL (47 TUCANAE)
TECHNIQUES: PHOTOMETRIC
topic GLOBULAR CLUSTERS: INDIVIDUAL (47 TUCANAE)
TECHNIQUES: PHOTOMETRIC
dc.description.none.fl_txt_mv We constructed for the first time a stellar density profile of 47 Tucanae (47 Tuc) out of ∼5.5 times its tidal radius (r t) using high-quality deep BV photometry. After carefully considering the influence of photometric errors, and Milky Way and Small Magellanic Cloud composite stellar population contamination, we found that the cluster stellar density profile reaches a nearly constant value from ∼1.7r t outward, which does not depend on the direction from the cluster's center considered. These results visibly contrast with recent distinct theoretical predictions on the existence of tidal tails or on a density profile that falls as at large distances, and with observational outcomes of a clumpy structure as well. Our results suggest that the envelope of 47 Tuc is a halo-like, nearly constant low-density structure.
Fil: Piatti, Andres Eduardo. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
description We constructed for the first time a stellar density profile of 47 Tucanae (47 Tuc) out of ∼5.5 times its tidal radius (r t) using high-quality deep BV photometry. After carefully considering the influence of photometric errors, and Milky Way and Small Magellanic Cloud composite stellar population contamination, we found that the cluster stellar density profile reaches a nearly constant value from ∼1.7r t outward, which does not depend on the direction from the cluster's center considered. These results visibly contrast with recent distinct theoretical predictions on the existence of tidal tails or on a density profile that falls as at large distances, and with observational outcomes of a clumpy structure as well. Our results suggest that the envelope of 47 Tuc is a halo-like, nearly constant low-density structure.
publishDate 2017
dc.date.none.fl_str_mv 2017-09
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/11336/76875
Piatti, Andres Eduardo; Detection of a Diffuse Extended Halo-like Structure around 47 Tuc; Institute of Physics Publishing; Astrophysical Journal Letters; 846; 1; 9-2017
2041-8213
0004-637X
CONICET Digital
CONICET
url http://hdl.handle.net/11336/76875
identifier_str_mv Piatti, Andres Eduardo; Detection of a Diffuse Extended Halo-like Structure around 47 Tuc; Institute of Physics Publishing; Astrophysical Journal Letters; 846; 1; 9-2017
2041-8213
0004-637X
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/2041-8213/aa8773
info:eu-repo/semantics/altIdentifier/doi/10.3847/2041-8213/aa8773
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv 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 Institute of Physics Publishing
publisher.none.fl_str_mv Institute of Physics Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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