Deeper Chandra follow-up of cygnus TeV source perpetuates mystery

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...

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Autores principales: Butt, Yousaf M., Drake, Jeremy, Benaglia, Paula, Combi, Jorge Ariel, Dame, Thomas, Miniati, Francesco, Romero, Gustavo Esteban
Formato: Articulo
Lenguaje:Inglés
Publicado: 2006
Materias:
Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83097
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83097
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
spellingShingle Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
Butt, Yousaf M.
Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
topic_facet Ciencias Astronómicas
Acceleration of particles
Cosmic rays
Gamma rays: observations
ISM: bubbles
Open clusters and associations: individual (Cygnus OB2)
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.
format Articulo
Articulo
author Butt, Yousaf M.
Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
author_facet Butt, Yousaf M.
Drake, Jeremy
Benaglia, Paula
Combi, Jorge Ariel
Dame, Thomas
Miniati, Francesco
Romero, Gustavo Esteban
author_sort Butt, Yousaf M.
title Deeper Chandra follow-up of cygnus TeV source perpetuates mystery
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
publishDate 2006
url http://sedici.unlp.edu.ar/handle/10915/83097
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AT miniatifrancesco deeperchandrafollowupofcygnustevsourceperpetuatesmystery
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