Radio spectral characteristics of the supernova remnant Puppis A and nearby sources
- Autores
- Reynoso, Estela Marta; Walsh, A. J.
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- This paper presents a new study of the spectral index distribution of the supernova remnant (SNR) Puppis A. The nature of field compact sources is also investigated according to the measured spectral indices. This work is based on new observations of Puppis A and its surroundings performed with the Australia Telescope Compact Array in two configurations using the Compact Array Broad-band Backend centred at 1.75 GHz. We find that the global spectral index of Puppis A is α = −0.563 ± 0.013. Local variations have been detected, however this global index represents well the bulk of the SNR. At the SE, we found a pattern of parallel strips with a flat spectrum compatible with small-scale filaments, although not correlated in detail. The easternmost filament agrees with the idea that the SNR shock front is interacting with an external cloud. There is no evidence of the previously suggested correlation between emissivity and spectral index. A number of compact features are proposed to be evolved clumps of ejecta based on their spectral indices, although dynamic measurements are needed to confirm this hypothesis.We estimate precise spectral indices for the five previously known field sources, two of which are found to be double (one of them, probably triple), and catalogue 40 new sources. In the light of these new determinations, the extragalactic nature previously accepted for some compact sources is now in doubt.
Fil: Reynoso, Estela Marta. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
Fil: Walsh, A. J.. Curtin University; Australia - Materia
-
radiation mechanisms: non-thermal
techniques: interferometric
ISM: individual objects: Puppis A
ISM: supernova remnants
radio continuum: ISM - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/17585
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Radio spectral characteristics of the supernova remnant Puppis A and nearby sourcesReynoso, Estela MartaWalsh, A. J.radiation mechanisms: non-thermaltechniques: interferometricISM: individual objects: Puppis AISM: supernova remnantsradio continuum: ISMhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1This paper presents a new study of the spectral index distribution of the supernova remnant (SNR) Puppis A. The nature of field compact sources is also investigated according to the measured spectral indices. This work is based on new observations of Puppis A and its surroundings performed with the Australia Telescope Compact Array in two configurations using the Compact Array Broad-band Backend centred at 1.75 GHz. We find that the global spectral index of Puppis A is α = −0.563 ± 0.013. Local variations have been detected, however this global index represents well the bulk of the SNR. At the SE, we found a pattern of parallel strips with a flat spectrum compatible with small-scale filaments, although not correlated in detail. The easternmost filament agrees with the idea that the SNR shock front is interacting with an external cloud. There is no evidence of the previously suggested correlation between emissivity and spectral index. A number of compact features are proposed to be evolved clumps of ejecta based on their spectral indices, although dynamic measurements are needed to confirm this hypothesis.We estimate precise spectral indices for the five previously known field sources, two of which are found to be double (one of them, probably triple), and catalogue 40 new sources. In the light of these new determinations, the extragalactic nature previously accepted for some compact sources is now in doubt.Fil: Reynoso, Estela Marta. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Walsh, A. J.. Curtin University; AustraliaOxford University Press2015-08info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/17585Reynoso, Estela Marta; Walsh, A. J.; Radio spectral characteristics of the supernova remnant Puppis A and nearby sources; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 451; 3; 8-2015; 3044-30540035-8711enginfo:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/451/3/3044/1193040/Radio-spectral-characteristics-of-the-supernova?redirectedFrom=fulltextinfo:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv1147info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1506.03801info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:13:38Zoai:ri.conicet.gov.ar:11336/17585instacron: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 10:13:38.883CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
title |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
spellingShingle |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources Reynoso, Estela Marta radiation mechanisms: non-thermal techniques: interferometric ISM: individual objects: Puppis A ISM: supernova remnants radio continuum: ISM |
title_short |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
title_full |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
title_fullStr |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
title_full_unstemmed |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
title_sort |
Radio spectral characteristics of the supernova remnant Puppis A and nearby sources |
dc.creator.none.fl_str_mv |
Reynoso, Estela Marta Walsh, A. J. |
author |
Reynoso, Estela Marta |
author_facet |
Reynoso, Estela Marta Walsh, A. J. |
author_role |
author |
author2 |
Walsh, A. J. |
author2_role |
author |
dc.subject.none.fl_str_mv |
radiation mechanisms: non-thermal techniques: interferometric ISM: individual objects: Puppis A ISM: supernova remnants radio continuum: ISM |
topic |
radiation mechanisms: non-thermal techniques: interferometric ISM: individual objects: Puppis A ISM: supernova remnants radio continuum: ISM |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.3 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
This paper presents a new study of the spectral index distribution of the supernova remnant (SNR) Puppis A. The nature of field compact sources is also investigated according to the measured spectral indices. This work is based on new observations of Puppis A and its surroundings performed with the Australia Telescope Compact Array in two configurations using the Compact Array Broad-band Backend centred at 1.75 GHz. We find that the global spectral index of Puppis A is α = −0.563 ± 0.013. Local variations have been detected, however this global index represents well the bulk of the SNR. At the SE, we found a pattern of parallel strips with a flat spectrum compatible with small-scale filaments, although not correlated in detail. The easternmost filament agrees with the idea that the SNR shock front is interacting with an external cloud. There is no evidence of the previously suggested correlation between emissivity and spectral index. A number of compact features are proposed to be evolved clumps of ejecta based on their spectral indices, although dynamic measurements are needed to confirm this hypothesis.We estimate precise spectral indices for the five previously known field sources, two of which are found to be double (one of them, probably triple), and catalogue 40 new sources. In the light of these new determinations, the extragalactic nature previously accepted for some compact sources is now in doubt. Fil: Reynoso, Estela Marta. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina Fil: Walsh, A. J.. Curtin University; Australia |
description |
This paper presents a new study of the spectral index distribution of the supernova remnant (SNR) Puppis A. The nature of field compact sources is also investigated according to the measured spectral indices. This work is based on new observations of Puppis A and its surroundings performed with the Australia Telescope Compact Array in two configurations using the Compact Array Broad-band Backend centred at 1.75 GHz. We find that the global spectral index of Puppis A is α = −0.563 ± 0.013. Local variations have been detected, however this global index represents well the bulk of the SNR. At the SE, we found a pattern of parallel strips with a flat spectrum compatible with small-scale filaments, although not correlated in detail. The easternmost filament agrees with the idea that the SNR shock front is interacting with an external cloud. There is no evidence of the previously suggested correlation between emissivity and spectral index. A number of compact features are proposed to be evolved clumps of ejecta based on their spectral indices, although dynamic measurements are needed to confirm this hypothesis.We estimate precise spectral indices for the five previously known field sources, two of which are found to be double (one of them, probably triple), and catalogue 40 new sources. In the light of these new determinations, the extragalactic nature previously accepted for some compact sources is now in doubt. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08 |
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/11336/17585 Reynoso, Estela Marta; Walsh, A. J.; Radio spectral characteristics of the supernova remnant Puppis A and nearby sources; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 451; 3; 8-2015; 3044-3054 0035-8711 |
url |
http://hdl.handle.net/11336/17585 |
identifier_str_mv |
Reynoso, Estela Marta; Walsh, A. J.; Radio spectral characteristics of the supernova remnant Puppis A and nearby sources; Oxford University Press; Monthly Notices Of The Royal Astronomical Society; 451; 3; 8-2015; 3044-3054 0035-8711 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/article-abstract/451/3/3044/1193040/Radio-spectral-characteristics-of-the-supernova?redirectedFrom=fulltext info:eu-repo/semantics/altIdentifier/doi/10.1093/mnras/stv1147 info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/1506.03801 |
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 |
Oxford University Press |
publisher.none.fl_str_mv |
Oxford University Press |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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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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