GMRT survey of Cygnus OB2 region

Autores
Ishwara Chandra, C. H.; Benaglia, Paula; De Becker, Michaël; Tej, Anandmayee
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
A good fraction of very high energy (VHE; > 100 GeV) sources do not have confirmed counterparts at any of the other branches of electromagnetc spectrum. In the extra-galactic sky, most of the VHE sources with counter-parts are blazars, a sub-class of active galactic nuclei. However, VHE sources with identified counterparts in our Galaxy do have a wide range of categories, ranging such as supernovae remnants, colliding wind binaries, pulsar wind nebulae, micro-quasars, etc. The VHE emission and radio emission due to synchrotron process do occur from the same population of relativistic electrons in several type of sources, so the radio band is the first band to search for possible counterparts to unidentified VHE sources. In addition, the radio spectral index also gives important constraints on compactness and energetics of the electron population. In this work we present a two-frequency radio survey, at frequencies 325 MHz and 610 MHz, of the Cygnus OB2 region with the Giant Metrewave Radio Telescope (GMRT) in order to address several astrophysical problems. The survey covers a wide area (∼ 5 square degrees) at sub-mJy sensitivity which helps to discover faint radio sources to several objects for the first time. Also this is the first deep wide area radio survey of the region below 1.4 GHz, and the low radio frequency will preferentially pickup more non-thermal radio sources as compared to high radio frequencies. Here, we present the early results from this survey.
Fil: Ishwara Chandra, C. H.. National Centre for Radio Astrophysics; India
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: De Becker, Michaël. Université de Liège; Bélgica
Fil: Tej, Anandmayee. Indian Institute of Space Science And Technology; India
2nd Belgo-Indian Network for Astronomy & Astrophysics
Bruselas
Bélgica
Société Royale des Sciences de Liège
Materia
OPEN CLUSTERS AND ASSOCIATIONS
CYGNUS OB2, 8, 9
RADIO CONTIINUUM: GENERAL
SURVEYS
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:11336/132533
Acceder
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network_name_str CONICET Digital (CONICET)
spelling GMRT survey of Cygnus OB2 regionIshwara Chandra, C. H.Benaglia, PaulaDe Becker, MichaëlTej, AnandmayeeOPEN CLUSTERS AND ASSOCIATIONSCYGNUS OB2, 8, 9RADIO CONTIINUUM: GENERALSURVEYShttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1A good fraction of very high energy (VHE; > 100 GeV) sources do not have confirmed counterparts at any of the other branches of electromagnetc spectrum. In the extra-galactic sky, most of the VHE sources with counter-parts are blazars, a sub-class of active galactic nuclei. However, VHE sources with identified counterparts in our Galaxy do have a wide range of categories, ranging such as supernovae remnants, colliding wind binaries, pulsar wind nebulae, micro-quasars, etc. The VHE emission and radio emission due to synchrotron process do occur from the same population of relativistic electrons in several type of sources, so the radio band is the first band to search for possible counterparts to unidentified VHE sources. In addition, the radio spectral index also gives important constraints on compactness and energetics of the electron population. In this work we present a two-frequency radio survey, at frequencies 325 MHz and 610 MHz, of the Cygnus OB2 region with the Giant Metrewave Radio Telescope (GMRT) in order to address several astrophysical problems. The survey covers a wide area (∼ 5 square degrees) at sub-mJy sensitivity which helps to discover faint radio sources to several objects for the first time. Also this is the first deep wide area radio survey of the region below 1.4 GHz, and the low radio frequency will preferentially pickup more non-thermal radio sources as compared to high radio frequencies. Here, we present the early results from this survey.Fil: Ishwara Chandra, C. H.. National Centre for Radio Astrophysics; IndiaFil: 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: De Becker, Michaël. Université de Liège; BélgicaFil: Tej, Anandmayee. Indian Institute of Space Science And Technology; India2nd Belgo-Indian Network for Astronomy & AstrophysicsBruselasBélgicaSociété Royale des Sciences de LiègeSociete des Sciences de Liege2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectWorkshopJournalhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/132533GMRT survey of Cygnus OB2 region; 2nd Belgo-Indian Network for Astronomy & Astrophysics; Bruselas; Bélgica; 2018; 166-1730037-9565CONICET DigitalCONICETenghttps://popups.uliege.be/0037-9565/index.php?id=8796info:eu-repo/semantics/altIdentifier/url/https://popups.uliege.be/0037-9565/index.php?id=8619Internacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:42:55Zoai:ri.conicet.gov.ar:11336/132533instacron: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:34982025-10-22 11:42:55.453CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv GMRT survey of Cygnus OB2 region
title GMRT survey of Cygnus OB2 region
spellingShingle GMRT survey of Cygnus OB2 region
Ishwara Chandra, C. H.
OPEN CLUSTERS AND ASSOCIATIONS
CYGNUS OB2, 8, 9
RADIO CONTIINUUM: GENERAL
SURVEYS
title_short GMRT survey of Cygnus OB2 region
title_full GMRT survey of Cygnus OB2 region
title_fullStr GMRT survey of Cygnus OB2 region
title_full_unstemmed GMRT survey of Cygnus OB2 region
title_sort GMRT survey of Cygnus OB2 region
dc.creator.none.fl_str_mv Ishwara Chandra, C. H.
Benaglia, Paula
De Becker, Michaël
Tej, Anandmayee
author Ishwara Chandra, C. H.
author_facet Ishwara Chandra, C. H.
Benaglia, Paula
De Becker, Michaël
Tej, Anandmayee
author_role author
author2 Benaglia, Paula
De Becker, Michaël
Tej, Anandmayee
author2_role author
author
author
dc.subject.none.fl_str_mv OPEN CLUSTERS AND ASSOCIATIONS
CYGNUS OB2, 8, 9
RADIO CONTIINUUM: GENERAL
SURVEYS
topic OPEN CLUSTERS AND ASSOCIATIONS
CYGNUS OB2, 8, 9
RADIO CONTIINUUM: GENERAL
SURVEYS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A good fraction of very high energy (VHE; > 100 GeV) sources do not have confirmed counterparts at any of the other branches of electromagnetc spectrum. In the extra-galactic sky, most of the VHE sources with counter-parts are blazars, a sub-class of active galactic nuclei. However, VHE sources with identified counterparts in our Galaxy do have a wide range of categories, ranging such as supernovae remnants, colliding wind binaries, pulsar wind nebulae, micro-quasars, etc. The VHE emission and radio emission due to synchrotron process do occur from the same population of relativistic electrons in several type of sources, so the radio band is the first band to search for possible counterparts to unidentified VHE sources. In addition, the radio spectral index also gives important constraints on compactness and energetics of the electron population. In this work we present a two-frequency radio survey, at frequencies 325 MHz and 610 MHz, of the Cygnus OB2 region with the Giant Metrewave Radio Telescope (GMRT) in order to address several astrophysical problems. The survey covers a wide area (∼ 5 square degrees) at sub-mJy sensitivity which helps to discover faint radio sources to several objects for the first time. Also this is the first deep wide area radio survey of the region below 1.4 GHz, and the low radio frequency will preferentially pickup more non-thermal radio sources as compared to high radio frequencies. Here, we present the early results from this survey.
Fil: Ishwara Chandra, C. H.. National Centre for Radio Astrophysics; India
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: De Becker, Michaël. Université de Liège; Bélgica
Fil: Tej, Anandmayee. Indian Institute of Space Science And Technology; India
2nd Belgo-Indian Network for Astronomy & Astrophysics
Bruselas
Bélgica
Société Royale des Sciences de Liège
description A good fraction of very high energy (VHE; > 100 GeV) sources do not have confirmed counterparts at any of the other branches of electromagnetc spectrum. In the extra-galactic sky, most of the VHE sources with counter-parts are blazars, a sub-class of active galactic nuclei. However, VHE sources with identified counterparts in our Galaxy do have a wide range of categories, ranging such as supernovae remnants, colliding wind binaries, pulsar wind nebulae, micro-quasars, etc. The VHE emission and radio emission due to synchrotron process do occur from the same population of relativistic electrons in several type of sources, so the radio band is the first band to search for possible counterparts to unidentified VHE sources. In addition, the radio spectral index also gives important constraints on compactness and energetics of the electron population. In this work we present a two-frequency radio survey, at frequencies 325 MHz and 610 MHz, of the Cygnus OB2 region with the Giant Metrewave Radio Telescope (GMRT) in order to address several astrophysical problems. The survey covers a wide area (∼ 5 square degrees) at sub-mJy sensitivity which helps to discover faint radio sources to several objects for the first time. Also this is the first deep wide area radio survey of the region below 1.4 GHz, and the low radio frequency will preferentially pickup more non-thermal radio sources as compared to high radio frequencies. Here, we present the early results from this survey.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Workshop
Journal
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/132533
GMRT survey of Cygnus OB2 region; 2nd Belgo-Indian Network for Astronomy & Astrophysics; Bruselas; Bélgica; 2018; 166-173
0037-9565
CONICET Digital
CONICET
url http://hdl.handle.net/11336/132533
identifier_str_mv GMRT survey of Cygnus OB2 region; 2nd Belgo-Indian Network for Astronomy & Astrophysics; Bruselas; Bélgica; 2018; 166-173
0037-9565
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://popups.uliege.be/0037-9565/index.php?id=8796
info:eu-repo/semantics/altIdentifier/url/https://popups.uliege.be/0037-9565/index.php?id=8619
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.coverage.none.fl_str_mv Internacional
dc.publisher.none.fl_str_mv Societe des Sciences de Liege
publisher.none.fl_str_mv Societe des Sciences de Liege
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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