Radio counterparts of gamma-ray sources in the Cygnus region

Autores
Benaglia, Paula; Ishwara Chandra, C. H.; Paredes, Josep Maria; Intema, Huib T.; Colazo, Marcelo E.; Isequilla, Natacha Laura
Año de publicación
2021
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counterparts at lower energies because the same population of relativistic electrons responsible for radio emission can also produce HE/VHE emission via inverse-Compton scattering. The Cygnus region is crowded by many gamma-ray sources, most of them remaining unidentified. In order to find possible counterparts to unidentified gamma-ray sources, we carried out a deep survey of the Cygnus region using the Giant Metrewave Radio Telescope at 610 and 325 MHz. We did a detailed search for counterparts in the error circle of HE/VHE sources. We report 36 radio sources found in the error ellipse of 15 HE sources, and 11 in those of VHE sources. Eight sources have a very steep radio spectral index a < -1.5, these are most likely to be pulsars and will be followed up for a periodicity search. Such a significant number of pulsar candidates within the error circle of HE/ VHE sources prompts a fresh look at the energetics and efficacy of pulsars and pulsar wind nebulae in this context.
Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics India; India
Fil: Paredes, Josep Maria. Universidad de Barcelona; España
Fil: Intema, Huib T.. Curtin University; Australia
Fil: Colazo, Marcelo E.. Comision Nacional de Actividades Espaciales; Argentina
Fil: Isequilla, Natacha Laura. Consejo Nacional de Investigaciones 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
Materia
SUPERNOVA REMNANTS
PULSARS
GAMMA-RAY SOURCES
RADIO CONTINUUM EMISSION
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:11336/135146
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Radio counterparts of gamma-ray sources in the Cygnus regionBenaglia, PaulaIshwara Chandra, C. H.Paredes, Josep MariaIntema, Huib T.Colazo, Marcelo E.Isequilla, Natacha LauraSUPERNOVA REMNANTSPULSARSGAMMA-RAY SOURCESRADIO CONTINUUM EMISSIONhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counterparts at lower energies because the same population of relativistic electrons responsible for radio emission can also produce HE/VHE emission via inverse-Compton scattering. The Cygnus region is crowded by many gamma-ray sources, most of them remaining unidentified. In order to find possible counterparts to unidentified gamma-ray sources, we carried out a deep survey of the Cygnus region using the Giant Metrewave Radio Telescope at 610 and 325 MHz. We did a detailed search for counterparts in the error circle of HE/VHE sources. We report 36 radio sources found in the error ellipse of 15 HE sources, and 11 in those of VHE sources. Eight sources have a very steep radio spectral index a < -1.5, these are most likely to be pulsars and will be followed up for a periodicity search. Such a significant number of pulsar candidates within the error circle of HE/ VHE sources prompts a fresh look at the energetics and efficacy of pulsars and pulsar wind nebulae in this context.Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; ArgentinaFil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics India; IndiaFil: Paredes, Josep Maria. Universidad de Barcelona; EspañaFil: Intema, Huib T.. Curtin University; AustraliaFil: Colazo, Marcelo E.. Comision Nacional de Actividades Espaciales; ArgentinaFil: Isequilla, Natacha Laura. Consejo Nacional de Investigaciones 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; ArgentinaIOP Publishing2021-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/135146Benaglia, Paula; Ishwara Chandra, C. H.; Paredes, Josep Maria; Intema, Huib T.; Colazo, Marcelo E.; et al.; Radio counterparts of gamma-ray sources in the Cygnus region; IOP Publishing; Astrophysical Journal Supplement Series; 252; 2; 2-2021; 1-200067-0049CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4365/abc891info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4365/abc891info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:41:17Zoai:ri.conicet.gov.ar:11336/135146instacron: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 10:41:17.571CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Radio counterparts of gamma-ray sources in the Cygnus region
title Radio counterparts of gamma-ray sources in the Cygnus region
spellingShingle Radio counterparts of gamma-ray sources in the Cygnus region
Benaglia, Paula
SUPERNOVA REMNANTS
PULSARS
GAMMA-RAY SOURCES
RADIO CONTINUUM EMISSION
title_short Radio counterparts of gamma-ray sources in the Cygnus region
title_full Radio counterparts of gamma-ray sources in the Cygnus region
title_fullStr Radio counterparts of gamma-ray sources in the Cygnus region
title_full_unstemmed Radio counterparts of gamma-ray sources in the Cygnus region
title_sort Radio counterparts of gamma-ray sources in the Cygnus region
dc.creator.none.fl_str_mv Benaglia, Paula
Ishwara Chandra, C. H.
Paredes, Josep Maria
Intema, Huib T.
Colazo, Marcelo E.
Isequilla, Natacha Laura
author Benaglia, Paula
author_facet Benaglia, Paula
Ishwara Chandra, C. H.
Paredes, Josep Maria
Intema, Huib T.
Colazo, Marcelo E.
Isequilla, Natacha Laura
author_role author
author2 Ishwara Chandra, C. H.
Paredes, Josep Maria
Intema, Huib T.
Colazo, Marcelo E.
Isequilla, Natacha Laura
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv SUPERNOVA REMNANTS
PULSARS
GAMMA-RAY SOURCES
RADIO CONTINUUM EMISSION
topic SUPERNOVA REMNANTS
PULSARS
GAMMA-RAY SOURCES
RADIO CONTINUUM EMISSION
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counterparts at lower energies because the same population of relativistic electrons responsible for radio emission can also produce HE/VHE emission via inverse-Compton scattering. The Cygnus region is crowded by many gamma-ray sources, most of them remaining unidentified. In order to find possible counterparts to unidentified gamma-ray sources, we carried out a deep survey of the Cygnus region using the Giant Metrewave Radio Telescope at 610 and 325 MHz. We did a detailed search for counterparts in the error circle of HE/VHE sources. We report 36 radio sources found in the error ellipse of 15 HE sources, and 11 in those of VHE sources. Eight sources have a very steep radio spectral index a < -1.5, these are most likely to be pulsars and will be followed up for a periodicity search. Such a significant number of pulsar candidates within the error circle of HE/ VHE sources prompts a fresh look at the energetics and efficacy of pulsars and pulsar wind nebulae in this context.
Fil: Benaglia, Paula. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Argentino de Radioastronomía. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Argentino de Radioastronomía; Argentina
Fil: Ishwara Chandra, C. H.. National Centre For Radio Astrophysics India; India
Fil: Paredes, Josep Maria. Universidad de Barcelona; España
Fil: Intema, Huib T.. Curtin University; Australia
Fil: Colazo, Marcelo E.. Comision Nacional de Actividades Espaciales; Argentina
Fil: Isequilla, Natacha Laura. Consejo Nacional de Investigaciones 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
description The view of the gamma-ray universe is being continuously expanded by space high-energy (HE) and ground-based very-high-energy (VHE) observatories. Yet, the angular resolution limitation still precludes a straightforward identification of these gamma-ray emitting sources. Radio observations are an effective tool for searching their possible counterparts at lower energies because the same population of relativistic electrons responsible for radio emission can also produce HE/VHE emission via inverse-Compton scattering. The Cygnus region is crowded by many gamma-ray sources, most of them remaining unidentified. In order to find possible counterparts to unidentified gamma-ray sources, we carried out a deep survey of the Cygnus region using the Giant Metrewave Radio Telescope at 610 and 325 MHz. We did a detailed search for counterparts in the error circle of HE/VHE sources. We report 36 radio sources found in the error ellipse of 15 HE sources, and 11 in those of VHE sources. Eight sources have a very steep radio spectral index a < -1.5, these are most likely to be pulsars and will be followed up for a periodicity search. Such a significant number of pulsar candidates within the error circle of HE/ VHE sources prompts a fresh look at the energetics and efficacy of pulsars and pulsar wind nebulae in this context.
publishDate 2021
dc.date.none.fl_str_mv 2021-02
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/11336/135146
Benaglia, Paula; Ishwara Chandra, C. H.; Paredes, Josep Maria; Intema, Huib T.; Colazo, Marcelo E.; et al.; Radio counterparts of gamma-ray sources in the Cygnus region; IOP Publishing; Astrophysical Journal Supplement Series; 252; 2; 2-2021; 1-20
0067-0049
CONICET Digital
CONICET
url http://hdl.handle.net/11336/135146
identifier_str_mv Benaglia, Paula; Ishwara Chandra, C. H.; Paredes, Josep Maria; Intema, Huib T.; Colazo, Marcelo E.; et al.; Radio counterparts of gamma-ray sources in the Cygnus region; IOP Publishing; Astrophysical Journal Supplement Series; 252; 2; 2-2021; 1-20
0067-0049
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.3847/1538-4365/abc891
info:eu-repo/semantics/altIdentifier/url/https://iopscience.iop.org/article/10.3847/1538-4365/abc891
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
application/pdf
dc.publisher.none.fl_str_mv IOP Publishing
publisher.none.fl_str_mv IOP Publishing
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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