INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars

Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view,...

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Detalles Bibliográficos
Autores: de Becker, M., Rauw. G., Pittard, J. M., Sana, H., Stevens, I. R., Romero, Gustavo Esteban
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2007
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/18411
Acceso en línea:http://hdl.handle.net/11336/18411
Access Level:acceso abierto
Palabra clave:Early type stars
Radiation mechanisms
Non thermal mechanisms
X ray stars
Gamma rays
Gamma ray observations
Acceleration of particles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
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spelling INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive starsde Becker, M.Rauw. G.Pittard, J. M.Sana, H.Stevens, I. R.Romero, Gustavo EstebanEarly type starsRadiation mechanismsNon thermal mechanismsX ray starsGamma raysGamma ray observationsAcceleration of particleshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130.Fil: de Becker, M.. Universite de Liege; BélgicaFil: Rauw. G.. Universite de Liege; BélgicaFil: Pittard, J. M.. The University of Leeds; Reino UnidoFil: Sana, H.. European Southern Observatory; ChileFil: Stevens, I. R.. University of Birmingham; Reino UnidoFil: Romero, Gustavo Esteban. 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. Universidad Nacional de la Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaEdp Sciences2007-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/18411de Becker, M.; Rauw. G.; Pittard, J. M.; Sana, H.; Stevens, I. R.; et al.; INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars; Edp Sciences; Astronomy And Astrophysics; 472; 3; 12-2007; 905-9100004-6361CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077734info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2007/36/aa7734-07/aa7734-07.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 Técnicas2024-05-08T13:32:41Zoai:ri.conicet.gov.ar:11336/18411instacron: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:34982024-05-08 13:32:41.686CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
title INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
spellingShingle INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
de Becker, M.
Early type stars
Radiation mechanisms
Non thermal mechanisms
X ray stars
Gamma rays
Gamma ray observations
Acceleration of particles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
title_short INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
title_full INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
title_fullStr INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
title_full_unstemmed INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
title_sort INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars
dc.creator.none.fl_str_mv de Becker, M.
Rauw. G.
Pittard, J. M.
Sana, H.
Stevens, I. R.
Romero, Gustavo Esteban
author de Becker, M.
author_facet de Becker, M.
Rauw. G.
Pittard, J. M.
Sana, H.
Stevens, I. R.
Romero, Gustavo Esteban
author_role author
author2 Rauw. G.
Pittard, J. M.
Sana, H.
Stevens, I. R.
Romero, Gustavo Esteban
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Early type stars
Radiation mechanisms
Non thermal mechanisms
X ray stars
Gamma rays
Gamma ray observations
Acceleration of particles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
topic Early type stars
Radiation mechanisms
Non thermal mechanisms
X ray stars
Gamma rays
Gamma ray observations
Acceleration of particles
https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
description Aims. We analyze INTEGRAL-ISGRI data in order to probe the hard X-ray emission (above 20 keV) from point sources in the Cyg OB2 region and to investigate the putative non-thermal high-energy emission from early-type stars (Wolf-Rayet and O-type stars). Among the targets located in the field of view, we focus on the still unidentified EGRET source 3EG 2033+4118 that may be related to massive stars known to produce non-thermal emission in the radio domain, and on the wide colliding-wind binary WR 140. Methods. Using a large set of data obtained with the IBIS-ISGRI imager onboard INTEGRAL, we run the OSA software package in order to find point sources in the fully coded field of view of the instrument. Results. Our data do not allow the detection of a lower-energy counterpart of 3EG J2033+4118 nor of any other new point sources in the field of view, and we derive upper limits on the high-energy flux for a few targets: 3EG J2033+4118, TeV J2032+4130, WR 140, WR 146 and WR 147. The results are discussed in the context of the multiwavelength investigation of these objects. Conclusions. The upper limits derived are valuable constraints for models aimed at understanding the acceleration of particles in non-thermal emitting massive stars, and of the still unidentified very-high gamma-ray source TeV J2032+4130.
publishDate 2007
dc.date.none.fl_str_mv 2007-12
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/11336/18411
de Becker, M.; Rauw. G.; Pittard, J. M.; Sana, H.; Stevens, I. R.; et al.; INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars; Edp Sciences; Astronomy And Astrophysics; 472; 3; 12-2007; 905-910
0004-6361
CONICET Digital
CONICET
url http://hdl.handle.net/11336/18411
identifier_str_mv de Becker, M.; Rauw. G.; Pittard, J. M.; Sana, H.; Stevens, I. R.; et al.; INTEGRAL-ISGRI observations of the Cygnus OB2 region: Searching for hard X-ray point sources in a region containing several non-thermal emitting massive stars; Edp Sciences; Astronomy And Astrophysics; 472; 3; 12-2007; 905-910
0004-6361
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361:20077734
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2007/36/aa7734-07/aa7734-07.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
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
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 15.81155

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