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dc.contributor.authorAbdo, A.A.en_US
dc.contributor.authorVenter, C.en_US
dc.contributor.authorAckermann, M.en_US
dc.contributor.authorAjello, M.en_US
dc.contributor.authorAllafort, A.en_US
dc.date.accessioned2012-02-29T09:52:01Z
dc.date.available2012-02-29T09:52:01Z
dc.date.issued2010en_US
dc.identifier.citationAbdo, A.A. et al. 2010. Fermi-LAT discovery of GeV gamma-ray emission from the young supernova remnant Cassiopeia A. Astrophysical journal letters, 710(1):L92-L97. [https://doi.org/10.1088/2041-8205/710/1/L92]en_US
dc.identifier.issn2041-8205en_US
dc.identifier.issn2041-8213 (Online)en_US
dc.identifier.urihttp://hdl.handle.net/10394/6156
dc.identifier.urihttps://doi.org/10.1088/2041-8205/710/1/L92
dc.description.abstractWe report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant (SNR) with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. These observations reveal a source with no discernible spatial extension detected at a significance level of 12.2σ above 500 MeV at a location that is consistent with the position of the remnant of the supernova explosion that occurred around 1680 in the Cassiopeia constellation—Cassiopeia A (Cas A). The gamma-ray flux and spectral shape of the source are consistent with a scenario in which the gamma-ray emission originates from relativistic particles accelerated in the shell of this remnant. The total content of cosmic rays (electrons and protons) accelerated in Cas A can be estimated as W CR sime (1-4) × 1049 erg thanks to the well-known density in the remnant assuming that the observed gamma ray originates in the SNR shell(s). The magnetic field in the radio-emitting plasma can be robustly constrained as B ≥ 0.1 mG, providing new evidence of the magnetic field amplification at the forward shock and the strong field in the shocked ejecta
dc.publisherIOP Publishingen_US
dc.subjectAcceleration of particles
dc.subjectISM: individual objects (Cassiopeia A)
dc.subjectRadiation mechanisms: non-thermal
dc.titleFermi-LAT discovery of GeV gamma-ray emission from the young supernova remnant Cassiopeia A.en_US
dc.contributor.researchID12006653 - Venter, Christo


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