Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps

24 páginas, 8 figuras, 3 tablas.-- Planck Collaboration: et al.

Detalles Bibliográficos
Autores: Barreiro, R. Belén, Herranz, Diego, López-Caniego, M., Martínez-González, Enrique, Vielva, Patricio
Tipo de recurso: artículo
Fecha de publicación:2011
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/46446
Acceso en línea:http://hdl.handle.net/10261/46446
Access Level:acceso abierto
Palabra clave:ISM: clouds
Dust, extinction
Stars: formation
ISM: structure
Submillimeter: ISM
Stars: protostars
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spelling Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumpsBarreiro, R. BelénHerranz, DiegoLópez-Caniego, M.Martínez-González, EnriqueVielva, PatricioISM: cloudsDust, extinctionStars: formationISM: structureSubmillimeter: ISMStars: protostars24 páginas, 8 figuras, 3 tablas.-- Planck Collaboration: et al.We perform a detailed investigation of sources from the Cold Cores Catalogue of Planck Objects (C3PO). Our goal is to probe the reliability of the detections, validate the separation between warm and cold dust emission components, provide the first glimpse at the nature, internal morphology and physical characterictics of the Planck-detected sources. We focus on a sub-sample of ten sources from the C3PO list, selected to sample different environments, from high latitude cirrus to nearby (150pc) and remote (2kpc) molecular complexes. We present Planck surface brightness maps and derive the dust temperature, emissivity spectral index, and column densities of the fields. With the help of higher resolution Herschel and AKARI continuum observations and molecular line data, we investigate the morphology of the sources and the properties of the substructures at scales below the Planck beam size. The cold clumps detected by Planck are found to be located on large-scale filamentary (or cometary) structures that extend up to 20pc in the remote sources. The thickness of these filaments ranges between 0.3 and 3pc, for column densities NH2 ~ 0.1 to 1.6 × 1022 cm-2, and with linear mass density covering a broad range, between 15 and 400 M⊙ pc-1. The dust temperatures are low (between 10 and 15K) and the Planck cold clumps correspond to local minima of the line-of-sight averaged dust temperature in these fields. These low temperatures are confirmed when AKARI and Herschel data are added to the spectral energy distributions. Herschel data reveal a wealth of substructure within the Planck cold clumps. In all cases (except two sources harbouring young stellar objects), the substructures are found to be colder, with temperatures as low as 7K. Molecular line observations provide gas column densities which are consistent with those inferred from the dust. The linewidths are all supra-thermal, providing large virial linear mass densities in the range 10 to 300 M⊙ pc-1, comparable within factors of a few, to the gas linear mass densities. The analysis of this small set of cold clumps already probes a broad variety of structures in the C3PO sample, probably associated with different evolutionary stages, from cold and starless clumps, to young protostellar objects still embedded in their cold surrounding cloud. Because of the all-sky coverage and its sensitivity, Planck is able to detect and locate the coldest spots in massive elongated structures that may be the long-searched for progenitors of stellar clusters.The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU).Peer reviewedEDP Sciences201220122011info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/46446reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1051/0004-6361/201116481info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/464462026-05-22T06:33:51Z
dc.title.none.fl_str_mv Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
title Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
spellingShingle Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
Barreiro, R. Belén
ISM: clouds
Dust, extinction
Stars: formation
ISM: structure
Submillimeter: ISM
Stars: protostars
title_short Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
title_full Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
title_fullStr Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
title_full_unstemmed Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
title_sort Planck early results. XXII. The submillimetre properties of a sample of Galactic cold clumps
dc.creator.none.fl_str_mv Barreiro, R. Belén
Herranz, Diego
López-Caniego, M.
Martínez-González, Enrique
Vielva, Patricio
author Barreiro, R. Belén
author_facet Barreiro, R. Belén
Herranz, Diego
López-Caniego, M.
Martínez-González, Enrique
Vielva, Patricio
author_role author
author2 Herranz, Diego
López-Caniego, M.
Martínez-González, Enrique
Vielva, Patricio
author2_role author
author
author
author
dc.subject.none.fl_str_mv ISM: clouds
Dust, extinction
Stars: formation
ISM: structure
Submillimeter: ISM
Stars: protostars
topic ISM: clouds
Dust, extinction
Stars: formation
ISM: structure
Submillimeter: ISM
Stars: protostars
description 24 páginas, 8 figuras, 3 tablas.-- Planck Collaboration: et al.
publishDate 2011
dc.date.none.fl_str_mv 2011
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/46446
url http://hdl.handle.net/10261/46446
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1051/0004-6361/201116481
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv EDP Sciences
publisher.none.fl_str_mv EDP Sciences
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.81155

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