Sökning: WFRF:(Maurin C) > Discovery of extend...
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000 | 11293naa a2202821 4500 | |
001 | oai:DiVA.org:lnu-30233 | |
003 | SwePub | |
008 | 131108s2012 | |||||||||||000 ||eng| | |
009 | oai:DiVA.org:su-162448 | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-302332 URI |
024 | 7 | a https://doi.org/10.1051/0004-6361/2011179282 DOI |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-1624482 URI |
040 | a (SwePub)lnud (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Abramowski, A.4 aut |
245 | 1 0 | a Discovery of extended VHE gamma-ray emission from the vicinity of the young massive stellar cluster Westerlund 1 |
264 | c 2012-01-17 | |
264 | 1 | b EDP Sciences,c 2012 |
338 | a print2 rdacarrier | |
520 | a Aims. Results obtained in very-high-energy (VHE; E >= 100 GeV) gamma-ray observations performed with the H.E.S.S. telescope array are used to investigate particle acceleration processes in the vicinity of the young massive stellar cluster Westerlund 1 (Wd 1). Methods. Imaging of Cherenkov light from gamma-ray induced particle cascades in the Earth's atmosphere is used to search for VHE gamma rays from the region around Wd 1. Possible catalogued counterparts are searched for and discussed in terms of morphology and energetics of the H.E.S.S. source. Results. The detection of the degree-scale extended VHE gamma-ray source HESS J1646-458 is reported based on 45 h of H.E.S.S. observations performed between 2004 and 2008. The VHE gamma-ray source is centred on the nominal position of Wd 1 and detected with a total statistical significance of similar to 20 sigma. The emission region clearly extends beyond the H.E.S.S. point-spread function (PSF). The differential energy spectrum follows a power law in energy with an index of Gamma = 2.19 +/- 0.08(stat) +/- 0.20(sys) and a flux normalisation at 1 TeV of Phi(0) = (9.0 +/- 1.4(stat) +/- 1.8(sys)) x 10(-12) TeV-1 cm(-2) s(-1). The integral flux above 0.2 TeV amounts to (5.2 +/- 0.9) x 10(-11) cm(-2) s(-1). Conclusions. Four objects coincident with HESS J1646-458 are discussed in the search of a counterpart, namely the magnetar CXOU J164710.2-455216, the X-ray binary 4U 1642-45, the pulsar PSR J1648-4611 and the massive stellar cluster Wd 1. In a single-source scenario, Wd 1 is favoured as site of VHE particle acceleration. Here, a hadronic parent population would be accelerated within the stellar cluster. Beside this, there is evidence for a multi-source origin, where a scenario involving PSR J1648-4611 could be viable to explain parts of the VHE gamma-ray emission of HESS J1646-458. | |
650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
650 | 7 | a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng |
653 | a open clusters and associations: general | |
653 | a gamma rays: stars | |
653 | a astroparticle physics | |
653 | a Astropartikelfysik | |
653 | a Astroparticle Physics | |
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700 | 1 | a Punch, Michaelu Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France4 aut0 (Swepub:lnu)mipuaa |
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700 | 1 | a Punch, Michaelu Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France4 aut0 (Swepub:lnu)mipuaa |
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700 | 1 | a Ripken, Joachimu Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)4 aut0 (Swepub:su)ripken |
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700 | 1 | a Zacharias, M.4 aut |
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710 | 2 | a Univ Paris Diderot, APC, AstroParticule & Cosmology, CNRS,IN2P3,CEA,Irfu, Observ Paris,Sorbonne Paris C, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, Franceb Fysikum4 org |
773 | 0 | t Astronomy and Astrophysicsd : EDP Sciencesg 537, s. A114-q 537<A114-x 0004-6361x 1432-0746 |
856 | 4 | u https://www.aanda.org/articles/aa/pdf/2012/01/aa17928-11.pdf |
856 | 4 | u https://doi.org/10.1051/0004-6361/201117928y Fulltext |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-30233 |
856 | 4 8 | u https://doi.org/10.1051/0004-6361/201117928 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-162448 |
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