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dc.date.accessioned | 2019-10-04T18:35:40Z | |
dc.date.available | 2019-10-04T18:35:40Z | |
dc.date.issued | 2009 | |
dc.identifier.uri | http://sedici.unlp.edu.ar/handle/10915/82794 | |
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 Hii 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. | en |
dc.format.extent | 241-250 | es |
dc.language | en | es |
dc.subject | Gamma rays: observations | es |
dc.subject | H II regions | es |
dc.subject | Infrared: stars | es |
dc.subject | Radio continuum: stars | es |
dc.subject | X-rays: binaries | es |
dc.title | Radio continuum and near-infrared study of the MGRO J2019+37 region | en |
dc.type | Articulo | es |
sedici.identifier.other | doi:10.1051/0004-6361/200912448 | es |
sedici.identifier.other | eid:2-s2.0-70449659973 | es |
sedici.identifier.issn | 0004-6361 | es |
sedici.creator.person | Paredes, J. M. | es |
sedici.creator.person | Martí, J. | es |
sedici.creator.person | Ishwara Chandra, C. H. | es |
sedici.creator.person | Sánchez Sutil, J. R. | es |
sedici.creator.person | Muñoz Arjonilla, A. J. | es |
sedici.creator.person | Moldón, J. | es |
sedici.creator.person | Peracaula, M. | es |
sedici.creator.person | Luque Escamilla, P. L. | es |
sedici.creator.person | Zabalza, V. | es |
sedici.creator.person | Bosch Ramon, V. | es |
sedici.creator.person | Bordas, P. | es |
sedici.creator.person | Romero, Gustavo Esteban | es |
sedici.creator.person | Ribó, M. | es |
sedici.subject.materias | Ciencias Astronómicas | es |
sedici.description.fulltext | true | es |
mods.originInfo.place | Instituto Argentino de Radioastronomía | es |
mods.originInfo.place | Facultad de Ciencias Astronómicas y Geofísicas | es |
sedici.subtype | Articulo | es |
sedici.rights.license | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
sedici.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
sedici.description.peerReview | peer-review | es |
sedici.relation.journalTitle | Astronomy and Astrophysics | es |
sedici.relation.journalVolumeAndIssue | vol. 507, no. 1 | es |