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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/132533
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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 Técnicas2025-09-29T10:13:02Zoai: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:34982025-09-29 10:13:02.57CONICET 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 |
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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 |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
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dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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