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Author Yeung, Paul K. H. ♦ Kong, Albert K. H. ♦ Tam, P. H. Thomas ♦ Hui, C. Y. ♦ Takata, Jumpei ♦ Cheng, K. S.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ♦ ACCELERATION ♦ COSMIC GAMMA SOURCES ♦ COSMIC RADIATION ♦ EMISSION ♦ GAMMA RADIATION ♦ GEV RANGE ♦ MEV RANGE ♦ NEUTRON STARS ♦ PULSARS ♦ SPECTRA ♦ SUPERNOVA REMNANTS ♦ TELESCOPES ♦ TEV RANGE
Abstract The supernova remnant (SNR) Kes 73 and/or the magnetar 1E 1841-045 at its center can deposit a large amount of energy to the surroundings and is potentially responsible for particle acceleration. Using the data taken with the Fermi Large Area Telescope (LAT), we confirmed the presence of an extended source whose centroid position is highly consistent with this magnetar/SNR pair. Its emission is intense from 100 MeV to >100 GeV. Its LAT spectrum can be decoupled into two components, which are respectively governed by two different mechanisms. According to the young age of this system, the magnetar is seemingly a necessary and sufficient source for the downward-curved spectrum below 10 GeV, as the observed <10 GeV flux is too high for the SNR to account for. On the other hand, the SNR is reasonably responsible for the hard spectrum above 10 GeV. Further studies of this region in the TeV regime is required so that we can perform physically meaningful comparisons of the >10 GeV spectrum and the TeV spectrum.
ISSN 0004637X
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-03-01
Publisher Place United States
Journal Astrophysical Journal
Volume Number 837
Issue Number 1