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dc.contributor.author
Paredes, Josep Maria
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dc.contributor.author
Martí, Josep
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Ishwara Chandra, C. H.
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Sánchez Sutil, J. R.
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Muñoz Arjonilla, Álvaro José
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dc.contributor.author
Moldón, J.
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Peracaula, M.
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Luque Escamilla, Pedro L.
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Zabalza, V.
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Bosch Ramon, Valentí
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Bordas, Pol
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Romero, Gustavo Esteban
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dc.contributor.author
Ribó, Marc
dc.date.available
2017-11-30T14:50:00Z
dc.date.issued
2009-11
dc.identifier.citation
Paredes, Josep Maria; Martí, Josep; Ishwara Chandra, C. H.; Sánchez Sutil, J. R.; Muñoz Arjonilla, Álvaro José; et al.; Radio continuum and near-infrared study of the MGRO J2019+37 region; EDP Sciences; Astronomy and Astrophysics; 507; 1; 11-2009; 241-250
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/29323
dc.description.abstract
Context. MGRO J2019+37 is an unidentified extended source of very high energy gamma-rays originally reported by the Milagro Collaboration as the brightest TeV source in the Cygnus region. Its extended emission could be powered by either a single or several sources. The GeV pulsar AGL J2020.5+3653, discovered by AGILE and associated with PSR J2021+3651, could contribute to the emission from MGRO J2019+37. Aims. Our aim is to identify radio and near-infrared sources in the field of the extended TeV source MGRO J2019+37, and study potential counterparts to explain its emission. Methods. We surveyed a region of about 6 square degrees with the Giant Metrewave Radio Telescope (GMRT) at the frequency 610 MHz. We also observed the central square degree of this survey in the near-infrared Ks-band using the 3.5 m telescope in Calar Alto. Archival X-ray observations of some specific fields are included. VLBI observations of an interesting radio source were performed. We explored possible scenarios to produce the multi-TeV emission from MGRO J2019+37 and studied which of the sources could be the main particle accelerator. Results. We present a catalogue of 362 radio sources detected with the GMRT in the field of MGRO J2019+37, and the results of a cross-correlation of this catalog with one obtained at near-infrared wavelengths, which contains ∼3 × 105 sources, as well as with available X-ray observations of the region. Some peculiar sources inside the ∼1◦ uncertainty region of the TeV emission from MGRO J2019+37 are discussed in detail, including the pulsar PSR J2021+3651 and its pulsar wind nebula PWN G75.2+0.1, two new radio-jet sources, the H ii region Sh 2-104 containing two star clusters, and the radio source NVSS J202032+363158. We also find that the hadronic scenario is the most likely in case of a single accelerator, and discuss the possible contribution from the sources mentioned above. Conclusions. Although the radio and GeV pulsar PSR J2021+3651 / AGL J2020.5+3653 and its associated pulsar wind nebula PWN G75.2+0.1 can contribute to the emission from MGRO J2019+37, extrapolation of the GeV spectrum does not explain the detected multi-TeV flux. Other sources discussed here could contribute to the emission of the Milagro source.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Gamma Ray Observations
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Hii Regions
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Infrared Stars
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Radio Continuum
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X-Ray Binaries
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Astronomía
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Ciencias Físicas
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CIENCIAS NATURALES Y EXACTAS
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dc.title
Radio continuum and near-infrared study of the MGRO J2019+37 region
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-10-04T14:55:24Z
dc.journal.volume
507
dc.journal.number
1
dc.journal.pagination
241-250
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Paredes, Josep Maria. Universidad de Barcelona; España
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Fil: Martí, Josep. Universidad de Jaén; España
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Fil: Ishwara Chandra, C. H.. National Centre for Radio Astrophysics; India
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Fil: Sánchez Sutil, J. R.. Universidad de Jaén; España
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Fil: Muñoz Arjonilla, Álvaro José. Universidad de Jaén; España
dc.description.fil
Fil: Moldón, J.. Universidad de Barcelona; España
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Fil: Peracaula, M.. Universidad de Girona; España
dc.description.fil
Fil: Luque Escamilla, Pedro L.. Universidad de Jaén; España
dc.description.fil
Fil: Zabalza, V.. Universidad de Barcelona; España
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Fil: Bosch Ramon, Valentí. Max Planck Institut für Kernphysik; Alemania
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Fil: Bordas, Pol. Universidad de Barcelona; España
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Fil: Romero, Gustavo Esteban. 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
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Fil: Ribó, Marc. Universidad de Barcelona; España
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.aanda.org/component/article?access=bibcode&bibcode=&bibcode=2009A%2526A...507..241PFUL
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/200912448
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