Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study

Astronomy and Astrophysics 551 (2013): A34 reproduced with permission from Astronomy and Astrophysics

Detalles Bibliográficos
Autores: Sicilia-Aguilar, Aurora, Linz, Hendrik, Eiroa, Carlos, White, Glenn J., Henning, T., Ándré, P, Stutz, Amelia
Tipo de recurso: artículo
Fecha de publicación:2013
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/662679
Acceso en línea:http://hdl.handle.net/10486/662679
https://dx.doi.org/10.1051/0004-6361/201220170
Access Level:acceso abierto
Palabra clave:Protoplanetary disks
Stars: formation
Stars: late-type
Stars: pre-main sequence
Física
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spelling Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt studySicilia-Aguilar, AuroraLinz, HendrikEiroa, CarlosWhite, Glenn J.Henning, T.Ándré, PStutz, AmeliaProtoplanetary disksStars: formationStars: late-typeStars: pre-main sequenceFísicaAstronomy and Astrophysics 551 (2013): A34 reproduced with permission from Astronomy and AstrophysicsContext. The CrA region and the Coronet cluster form a nearby (138 pc), young (1-2 Myr) star-forming region that hosts a moderate population of Class I, II, and III objects. Aims. We study the structure of the cluster and the properties of the protostars and protoplanetary disks in the region. Methods. We present Herschel PACS photometry at 100 and 160 μm, obtained as part of the Herschel Gould Belt Survey. The Herschel maps reveal the cluster members within the cloud with high sensitivity and high dynamic range. Results. Many of the cluster members are detected, including some embedded, very low-mass objects, several protostars (some of them extended), and substantial emission from the surrounding molecular cloud. Herschel also reveals some striking structures, such as bright filaments around the IRS 5 protostar complex and a bubble-shaped rim associated with the Class I object IRS 2. The disks around the Class II objects display a wide range of mid-and far-IR excesses consistent with different disk structures. We have modeled the disks with the RADMC radiative transfer code to quantify their properties. Some of them are consistent with flared, massive, relatively primordial disks (S CrA, T CrA). Others display significant evidence for inside-out evolution, consistent with the presence of inner holes/gaps (G-85, G-87). Finally, we found disks with a dramatic small dust depletion (G-1, HBC 677) that, in some cases, could be related to truncation or to the presence of large gaps in a flared disk (CrA-159). The derived masses for the disks around the low-mass stars are found to be below the typical values in Taurus, in agreement with previous Spitzer observations. Conclusions. The Coronet cluster presents itself as an interesting compact region that contains both young protostars and very evolved disks. The Herschel data provide sufficient spatial resolution to detect small-scale details, such as filamentary structures or spiral arms associated with multiple star formation. The disks around the cluster members range from massive, flared primordial disks to disks with substantial small dust grain depletion or with evidence of inside-out evolution. This results in an interesting mixture of objects for a young and presumably coevally formed cluster. Given the high degree of multiplicity and interactions observed among the protostars in the region, the diversity of disks may be a consequence of the early star formation history, which should also be taken into account when studying the disk properties in similar sparsely populated clustersSupported by the Spanish “Ramón y Cajal” program from the Spanish MICINN, grant number RYC2010-06164.ESODepartamento de Física TeóricaFacultad de Ciencias20132013-02-20research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/662679https://dx.doi.org/10.1051/0004-6361/201220170reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/6626792026-06-23T12:46:27Z
dc.title.none.fl_str_mv Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
title Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
spellingShingle Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
Sicilia-Aguilar, Aurora
Protoplanetary disks
Stars: formation
Stars: late-type
Stars: pre-main sequence
Física
title_short Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
title_full Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
title_fullStr Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
title_full_unstemmed Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
title_sort Protostars, multiplicity, and disk evolution in the Corona Australis region: a herschel gould belt study
dc.creator.none.fl_str_mv Sicilia-Aguilar, Aurora
Linz, Hendrik
Eiroa, Carlos
White, Glenn J.
Henning, T.
Ándré, P
Stutz, Amelia
author Sicilia-Aguilar, Aurora
author_facet Sicilia-Aguilar, Aurora
Linz, Hendrik
Eiroa, Carlos
White, Glenn J.
Henning, T.
Ándré, P
Stutz, Amelia
author_role author
author2 Linz, Hendrik
Eiroa, Carlos
White, Glenn J.
Henning, T.
Ándré, P
Stutz, Amelia
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Teórica
Facultad de Ciencias
dc.subject.none.fl_str_mv Protoplanetary disks
Stars: formation
Stars: late-type
Stars: pre-main sequence
Física
topic Protoplanetary disks
Stars: formation
Stars: late-type
Stars: pre-main sequence
Física
description Astronomy and Astrophysics 551 (2013): A34 reproduced with permission from Astronomy and Astrophysics
publishDate 2013
dc.date.none.fl_str_mv 2013
2013-02-20
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/662679
https://dx.doi.org/10.1051/0004-6361/201220170
url http://hdl.handle.net/10486/662679
https://dx.doi.org/10.1051/0004-6361/201220170
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ESO
publisher.none.fl_str_mv ESO
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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