Deeper Chandra follow-up of cygnus TeV source perpetuates mystery

Autores
Butt, Yousaf M.; Drake, Jeremy; Benaglia, Paula; Combi, Jorge Ariel; Dame, Thomas; Miniati, Francesco; Romero, Gustavo Esteban
Año de publicación
2006
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A 50 ks Chandra observation of the unidentified TeV source in Cygnus reported by the HEGRA collaboration reveals no obvious diffuse X-ray counterpart. However, 240 pointlike X-ray sources are detected within or nearby the extended TeV J2032+4130 source region, of which at least 36 are massive stars and two may be radio emitters. That the HEGRA source is a composite, having as a counterpart the multiple pointlike X-ray sources we observe, cannot be ruled out. Indeed, the distribution of pointlike X-ray sources appears nonuniform and concentrated broadly within the extent of the TeV source region. We offer a hypothesis for the origin of the very high energy gamma-ray emission in Cyg OB2 based on the local acceleration of TeV-range cosmic rays and the differential distribution of OB versus less massive stars in this association.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/83097
Acceder
id SEDICI_137488abb1ec69226204c5c7e56e81fe
oai_identifier_str oai:sedici.unlp.edu.ar:10915/83097
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Deeper Chandra follow-up of cygnus TeV source perpetuates mysteryButt, Yousaf M.Drake, JeremyBenaglia, PaulaCombi, Jorge ArielDame, ThomasMiniati, FrancescoRomero, Gustavo EstebanCiencias AstronómicasAcceleration of particlesCosmic raysGamma rays: observationsISM: bubblesOpen clusters and associations: individual (Cygnus OB2)A 50 ks Chandra observation of the unidentified TeV source in Cygnus reported by the HEGRA collaboration reveals no obvious diffuse X-ray counterpart. However, 240 pointlike X-ray sources are detected within or nearby the extended TeV J2032+4130 source region, of which at least 36 are massive stars and two may be radio emitters. That the HEGRA source is a composite, having as a counterpart the multiple pointlike X-ray sources we observe, cannot be ruled out. Indeed, the distribution of pointlike X-ray sources appears nonuniform and concentrated broadly within the extent of the TeV source region. We offer a hypothesis for the origin of the very high energy gamma-ray emission in Cyg OB2 based on the local acceleration of TeV-range cosmic rays and the differential distribution of OB versus less massive stars in this association.Facultad de Ciencias Astronómicas y Geofísicas2006info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf238-244http://sedici.unlp.edu.ar/handle/10915/83097enginfo:eu-repo/semantics/altIdentifier/issn/0004-637Xinfo:eu-repo/semantics/altIdentifier/doi/10.1086/502642info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:56:37Zoai:sedici.unlp.edu.ar:10915/83097Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:56:37.269SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
title Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
spellingShingle Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
Butt, Yousaf M.
Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
title_short Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
title_full Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
title_fullStr Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
title_full_unstemmed Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
title_sort Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
dc.creator.none.fl_str_mv Butt, Yousaf M.
Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
author Butt, Yousaf M.
author_facet Butt, Yousaf M.
Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
author_role author
author2 Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
topic Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
dc.description.none.fl_txt_mv A 50 ks Chandra observation of the unidentified TeV source in Cygnus reported by the HEGRA collaboration reveals no obvious diffuse X-ray counterpart. However, 240 pointlike X-ray sources are detected within or nearby the extended TeV J2032+4130 source region, of which at least 36 are massive stars and two may be radio emitters. That the HEGRA source is a composite, having as a counterpart the multiple pointlike X-ray sources we observe, cannot be ruled out. Indeed, the distribution of pointlike X-ray sources appears nonuniform and concentrated broadly within the extent of the TeV source region. We offer a hypothesis for the origin of the very high energy gamma-ray emission in Cyg OB2 based on the local acceleration of TeV-range cosmic rays and the differential distribution of OB versus less massive stars in this association.
Facultad de Ciencias Astronómicas y Geofísicas
description A 50 ks Chandra observation of the unidentified TeV source in Cygnus reported by the HEGRA collaboration reveals no obvious diffuse X-ray counterpart. However, 240 pointlike X-ray sources are detected within or nearby the extended TeV J2032+4130 source region, of which at least 36 are massive stars and two may be radio emitters. That the HEGRA source is a composite, having as a counterpart the multiple pointlike X-ray sources we observe, cannot be ruled out. Indeed, the distribution of pointlike X-ray sources appears nonuniform and concentrated broadly within the extent of the TeV source region. We offer a hypothesis for the origin of the very high energy gamma-ray emission in Cyg OB2 based on the local acceleration of TeV-range cosmic rays and the differential distribution of OB versus less massive stars in this association.
publishDate 2006
dc.date.none.fl_str_mv 2006
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/83097
url http://sedici.unlp.edu.ar/handle/10915/83097
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-637X
info:eu-repo/semantics/altIdentifier/doi/10.1086/502642
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
238-244
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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