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http://hdl.handle.net/2445/49965
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DC Field | Value | Language |
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dc.contributor.author | Paredes i Poy, Josep Maria | - |
dc.contributor.author | Ishwara-Chandra, C. H. | - |
dc.contributor.author | Bosch i Ramon, Valentí | - |
dc.contributor.author | Zabalza de Torres, Víctor | - |
dc.contributor.author | Iwasawa, Kazushi | - |
dc.contributor.author | Ribó Gomis, Marc | - |
dc.date.accessioned | 2014-02-17T08:04:30Z | - |
dc.date.available | 2014-02-17T08:04:30Z | - |
dc.date.issued | 2014-01 | - |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.uri | http://hdl.handle.net/2445/49965 | - |
dc.description.abstract | Context. There are a number of very high energy sources in the Galaxy that remain unidentified. Multi-wavelength and variability studies, and catalogue searches, are powerful tools to identify the physical counterpart, given the uncertainty in the source location and extension. Aims. This work carries out a thorough multi-wavelength study of the unidentified, very high energy source HESS J1858+020 and its environs. Methods. We have performed Giant Metrewave Radio Telescope observations at 610 MHz and 1.4 GHz to obtain a deep, low-frequency radio image of the region surrounding HESS J1858+020. We analysed archival radio, infrared, and X-ray data as well. This observational information, combined with molecular data, catalogue sources, and a nearby Fermi gamma-ray detection of unidentified origin, are combined to explore possible counterparts to the very high energy source. Results. We provide with a deep radio image of a supernova remnant that might be related to the GeV and TeV emission in the region. We confirm the presence of an H ii region next to the supernova remnant and coincident with molecular emission. A potential region of star formation is also identified. We identify several radio and X-ray sources in the surroundings. Some of these sources are known planetary nebulae, whereas others may be non-thermal extended emitters and embedded young stellar objects. Three old, background Galactic pulsars also neighbour HESS J1858+020 along the line of sight. Conclusions. The region surrounding HESS J1858+020 is rich in molecular structures and non-thermal objects that may potentially be linked to this unidentified very high energy source. In particular, a supernova remnant interacting with nearby molecular clouds may be a good candidate, but a star forming region, or a non-thermal radio source of yet unclear nature, may also be behind the gamma-ray source. The neighbouring pulsars, despite being old and distant, cannot be discarded as candidates. Further observational studies are needed, however, to narrow the search for a counterpart to the HESS source. | - |
dc.format.extent | 8 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Verlag | - |
dc.relation.isformatof | Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361/201322306 | - |
dc.relation.ispartof | Astronomy and Astrophysics, 2014, vol. 561, num. A56, p. 1-8 | - |
dc.relation.uri | http://dx.doi.org/10.1051/0004-6361/201322306 | - |
dc.rights | (c) Springer Verlag, 2014 | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Raigs gamma | - |
dc.subject.classification | Púlsars | - |
dc.subject.classification | Supernoves | - |
dc.subject.classification | Radioastronomia | - |
dc.subject.classification | Formació d'estels | - |
dc.subject.classification | Astrofísica | - |
dc.subject.classification | Interferòmetres | - |
dc.subject.other | Gamma rays | - |
dc.subject.other | Pulsars | - |
dc.subject.other | Supernovae | - |
dc.subject.other | Radio astronomy | - |
dc.subject.other | Star formation | - |
dc.subject.other | Astrophysics | - |
dc.subject.other | Interferometers | - |
dc.title | Deep GMRT radio observations and a multi-wavelength study of the region around HESS J1858+020 | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/acceptedVersion | - |
dc.identifier.idgrec | 633607 | - |
dc.date.updated | 2014-02-17T08:04:30Z | - |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/FP7/321520/EU//ASTFLOW | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) Publicacions de projectes de recerca finançats per la UE |
Files in This Item:
File | Description | Size | Format | |
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633607.pdf | 993.74 kB | Adobe PDF | View/Open |
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