Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales

We use R-band CCD linear polarimetry collected for about 12,000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival Two Micron All Sky Survey data, we estimate that the surveyed areas present t...

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Detalhes bibliográficos
Autores: Franco, Gabriel A. P., Alves, Felipe O., Girart, Josep Miquel
Formato: artículo
Fecha de publicación:2010
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/38841
Acesso em linha:http://hdl.handle.net/10261/38841
Access Level:acceso abierto
Palavra-chave:ISM: clouds
ISM: individual objects (Pipe nebula)
Stars: formation
Techniques: polarimetric
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spelling Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core ScalesFranco, Gabriel A. P.Alves, Felipe O.Girart, Josep MiquelISM: cloudsISM: individual objects (Pipe nebula)Stars: formationTechniques: polarimetricWe use R-band CCD linear polarimetry collected for about 12,000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival Two Micron All Sky Survey data, we estimate that the surveyed areas present total visual extinctions in the range 0.6 mag ≤ AV ≤ 4.6 mag. While the observed polarizations show a well-ordered large-scale pattern, with polarization vectors almost perpendicularly aligned to the cloud's long axis, at core scales one sees details that are characteristics of each core. Although many observed stars present degrees of polarization that are unusual for the common interstellar medium (ISM), our analysis suggests that the dust grains constituting the diffuse parts of the Pipe nebula seem to have the same properties as the normal Galactic ISM. Estimates of the second-order structure function of the polarization angles suggest that most of the Pipe nebula is magnetically dominated and that turbulence is sub-Alvénic. The Pipe nebula is certainly an interesting region to investigate the processes that prevailed during the initial phases of low-mass stellar formation.Peer reviewedAmerican Astronomical SocietyInstitute of Physics Publishing201120112010info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/38841reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1088/0004-637X/723/1/146info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/388412026-05-22T06:33:51Z
dc.title.none.fl_str_mv Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
title Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
spellingShingle Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
Franco, Gabriel A. P.
ISM: clouds
ISM: individual objects (Pipe nebula)
Stars: formation
Techniques: polarimetric
title_short Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
title_full Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
title_fullStr Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
title_full_unstemmed Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
title_sort Detailed Interstellar Polarimetric Properties of the Pipe Nebula at Core Scales
dc.creator.none.fl_str_mv Franco, Gabriel A. P.
Alves, Felipe O.
Girart, Josep Miquel
author Franco, Gabriel A. P.
author_facet Franco, Gabriel A. P.
Alves, Felipe O.
Girart, Josep Miquel
author_role author
author2 Alves, Felipe O.
Girart, Josep Miquel
author2_role author
author
dc.subject.none.fl_str_mv ISM: clouds
ISM: individual objects (Pipe nebula)
Stars: formation
Techniques: polarimetric
topic ISM: clouds
ISM: individual objects (Pipe nebula)
Stars: formation
Techniques: polarimetric
description We use R-band CCD linear polarimetry collected for about 12,000 background field stars in 46 fields of view toward the Pipe nebula to investigate the properties of the polarization across this dark cloud. Based on archival Two Micron All Sky Survey data, we estimate that the surveyed areas present total visual extinctions in the range 0.6 mag ≤ AV ≤ 4.6 mag. While the observed polarizations show a well-ordered large-scale pattern, with polarization vectors almost perpendicularly aligned to the cloud's long axis, at core scales one sees details that are characteristics of each core. Although many observed stars present degrees of polarization that are unusual for the common interstellar medium (ISM), our analysis suggests that the dust grains constituting the diffuse parts of the Pipe nebula seem to have the same properties as the normal Galactic ISM. Estimates of the second-order structure function of the polarization angles suggest that most of the Pipe nebula is magnetically dominated and that turbulence is sub-Alvénic. The Pipe nebula is certainly an interesting region to investigate the processes that prevailed during the initial phases of low-mass stellar formation.
publishDate 2010
dc.date.none.fl_str_mv 2010
2011
2011
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/10261/38841
url http://hdl.handle.net/10261/38841
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1088/0004-637X/723/1/146
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv American Astronomical Society
Institute of Physics Publishing
publisher.none.fl_str_mv American Astronomical Society
Institute of Physics Publishing
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
_version_ 1869423057562501120
score 15,198674

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