A fully sampled ë21 cm linear polarization survey of the southern sky

Autores
Testori, Juan Carlos; Reich, P.; Reich, W.
Año de publicación
2008
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Context: Linear polarization of Galactic synchrotron emission provides valuable information on the Galactic magnetic field and on the properties of the Galactic magneto-ionic medium. Polarized high-latitude Galactic emission is the major foreground for polarization studies of the cosmic microwave background. Aims: We present a new southern-sky ë21 cm linear polarization survey, which complements the recent ë21 cm DRAO northern sky polarization data. Methods: We used a 30-m telescope located at Villa Elisa/Argentina to map the southern sky simultaneously in continuum and linear polarization. Results: We present a fully sampled map of linearly polarized emission at ë21 cm of the southern sky for declinations between -10° and -90°. The angular resolution of the survey is 36' and its sensitivity is 15 mK (rms-noise) in Stokes U and Q. The survey's zero-level has been adjusted to that of the recent DRAO 1.4 GHz linear polarization survey by comparing data in the region of overlap between -10° and -27°. Conclusions: The polarized southern sky at 1.4 GHz shows large areas with smooth low-level emission almost uncorrelated to total intensities indicating that Faraday rotation originating in the Galactic interstellar medium along the line of sight is significant at 1.4 GHz. The southern sky is much less contaminated by local foreground features than is the northern sky. Thus high-frequency observations of polarized cosmic microwave emission are expected to be less affected. The percentage polarization of the high-latitude emission is low, which seems to be an intrinsic property of Galactic emission.
Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Max Planck Institut für Radioastronomie; Alemania
Fil: Reich, P.. Max Planck Institut für Radioastronomie; Alemania
Fil: Reich, W.. Max Planck Institut für Radioastronomie; Alemania
Materia
Surveys
21 cm linear polarization survey
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:11336/16972
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/16972
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A fully sampled ë21 cm linear polarization survey of the southern skyTestori, Juan CarlosReich, P.Reich, W.Surveys21 cm linear polarization surveyhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Context: Linear polarization of Galactic synchrotron emission provides valuable information on the Galactic magnetic field and on the properties of the Galactic magneto-ionic medium. Polarized high-latitude Galactic emission is the major foreground for polarization studies of the cosmic microwave background. Aims: We present a new southern-sky ë21 cm linear polarization survey, which complements the recent ë21 cm DRAO northern sky polarization data. Methods: We used a 30-m telescope located at Villa Elisa/Argentina to map the southern sky simultaneously in continuum and linear polarization. Results: We present a fully sampled map of linearly polarized emission at ë21 cm of the southern sky for declinations between -10° and -90°. The angular resolution of the survey is 36' and its sensitivity is 15 mK (rms-noise) in Stokes U and Q. The survey's zero-level has been adjusted to that of the recent DRAO 1.4 GHz linear polarization survey by comparing data in the region of overlap between -10° and -27°. Conclusions: The polarized southern sky at 1.4 GHz shows large areas with smooth low-level emission almost uncorrelated to total intensities indicating that Faraday rotation originating in the Galactic interstellar medium along the line of sight is significant at 1.4 GHz. The southern sky is much less contaminated by local foreground features than is the northern sky. Thus high-frequency observations of polarized cosmic microwave emission are expected to be less affected. The percentage polarization of the high-latitude emission is low, which seems to be an intrinsic property of Galactic emission.Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Max Planck Institut für Radioastronomie; AlemaniaFil: Reich, P.. Max Planck Institut für Radioastronomie; AlemaniaFil: Reich, W.. Max Planck Institut für Radioastronomie; AlemaniaEdp Sciences2008-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/16972Testori, Juan Carlos; Reich, P.; Reich, W.; A fully sampled ë21 cm linear polarization survey of the southern sky; Edp Sciences; Astronomy And Astrophysics; 484; 12-2008; 733-7420004-6361enginfo:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2008A%26A...484..733Tinfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078842info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/24/aa8842-07/aa8842-07.htmlinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:43:54Zoai:ri.conicet.gov.ar:11336/16972instacron: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 09:43:54.441CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A fully sampled ë21 cm linear polarization survey of the southern sky
title A fully sampled ë21 cm linear polarization survey of the southern sky
spellingShingle A fully sampled ë21 cm linear polarization survey of the southern sky
Testori, Juan Carlos
Surveys
21 cm linear polarization survey
title_short A fully sampled ë21 cm linear polarization survey of the southern sky
title_full A fully sampled ë21 cm linear polarization survey of the southern sky
title_fullStr A fully sampled ë21 cm linear polarization survey of the southern sky
title_full_unstemmed A fully sampled ë21 cm linear polarization survey of the southern sky
title_sort A fully sampled ë21 cm linear polarization survey of the southern sky
dc.creator.none.fl_str_mv Testori, Juan Carlos
Reich, P.
Reich, W.
author Testori, Juan Carlos
author_facet Testori, Juan Carlos
Reich, P.
Reich, W.
author_role author
author2 Reich, P.
Reich, W.
author2_role author
author
dc.subject.none.fl_str_mv Surveys
21 cm linear polarization survey
topic Surveys
21 cm linear polarization survey
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Context: Linear polarization of Galactic synchrotron emission provides valuable information on the Galactic magnetic field and on the properties of the Galactic magneto-ionic medium. Polarized high-latitude Galactic emission is the major foreground for polarization studies of the cosmic microwave background. Aims: We present a new southern-sky ë21 cm linear polarization survey, which complements the recent ë21 cm DRAO northern sky polarization data. Methods: We used a 30-m telescope located at Villa Elisa/Argentina to map the southern sky simultaneously in continuum and linear polarization. Results: We present a fully sampled map of linearly polarized emission at ë21 cm of the southern sky for declinations between -10° and -90°. The angular resolution of the survey is 36' and its sensitivity is 15 mK (rms-noise) in Stokes U and Q. The survey's zero-level has been adjusted to that of the recent DRAO 1.4 GHz linear polarization survey by comparing data in the region of overlap between -10° and -27°. Conclusions: The polarized southern sky at 1.4 GHz shows large areas with smooth low-level emission almost uncorrelated to total intensities indicating that Faraday rotation originating in the Galactic interstellar medium along the line of sight is significant at 1.4 GHz. The southern sky is much less contaminated by local foreground features than is the northern sky. Thus high-frequency observations of polarized cosmic microwave emission are expected to be less affected. The percentage polarization of the high-latitude emission is low, which seems to be an intrinsic property of Galactic emission.
Fil: Testori, Juan Carlos. Provincia de Buenos Aires. Gobernación. Comision de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomia; Argentina. Max Planck Institut für Radioastronomie; Alemania
Fil: Reich, P.. Max Planck Institut für Radioastronomie; Alemania
Fil: Reich, W.. Max Planck Institut für Radioastronomie; Alemania
description Context: Linear polarization of Galactic synchrotron emission provides valuable information on the Galactic magnetic field and on the properties of the Galactic magneto-ionic medium. Polarized high-latitude Galactic emission is the major foreground for polarization studies of the cosmic microwave background. Aims: We present a new southern-sky ë21 cm linear polarization survey, which complements the recent ë21 cm DRAO northern sky polarization data. Methods: We used a 30-m telescope located at Villa Elisa/Argentina to map the southern sky simultaneously in continuum and linear polarization. Results: We present a fully sampled map of linearly polarized emission at ë21 cm of the southern sky for declinations between -10° and -90°. The angular resolution of the survey is 36' and its sensitivity is 15 mK (rms-noise) in Stokes U and Q. The survey's zero-level has been adjusted to that of the recent DRAO 1.4 GHz linear polarization survey by comparing data in the region of overlap between -10° and -27°. Conclusions: The polarized southern sky at 1.4 GHz shows large areas with smooth low-level emission almost uncorrelated to total intensities indicating that Faraday rotation originating in the Galactic interstellar medium along the line of sight is significant at 1.4 GHz. The southern sky is much less contaminated by local foreground features than is the northern sky. Thus high-frequency observations of polarized cosmic microwave emission are expected to be less affected. The percentage polarization of the high-latitude emission is low, which seems to be an intrinsic property of Galactic emission.
publishDate 2008
dc.date.none.fl_str_mv 2008-12
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/11336/16972
Testori, Juan Carlos; Reich, P.; Reich, W.; A fully sampled ë21 cm linear polarization survey of the southern sky; Edp Sciences; Astronomy And Astrophysics; 484; 12-2008; 733-742
0004-6361
url http://hdl.handle.net/11336/16972
identifier_str_mv Testori, Juan Carlos; Reich, P.; Reich, W.; A fully sampled ë21 cm linear polarization survey of the southern sky; Edp Sciences; Astronomy And Astrophysics; 484; 12-2008; 733-742
0004-6361
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://adsabs.harvard.edu/abs/2008A%26A...484..733T
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20078842
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2008/24/aa8842-07/aa8842-07.html
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 Edp Sciences
publisher.none.fl_str_mv Edp Sciences
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 13.070432

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