NONTHERMAL EMISSION FROM MIDDLE-AGED SUPERNOVA REMNANTS INTERACTING WITH MOLECULAR CLOUDS

Journal Article · Tue Sep 20 04:00:00 EDT 2011 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/739/1/11; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21587533

Tang, Y Y; Fang, J; Zhang, L ^[1]

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1. Department of Physics, Yunnan University, Kunming 650091 (China)

Supernova remnants (SNRs) interacting with dense molecular clouds (MCs) are proven to be bright {gamma}-ray emitters by recent observations in the GeV-TeV band. We theoretically investigate the multiband radiative properties of the four middle-aged SNRs IC443, W51C, W28, and W44 with a time-dependent injection model. In the model, part of the SNR shell transports into a dense MC, with the other part of the shell evolving in a relatively tenuous interstellar medium. We find a broken power law with a break energy of {approx}3-40 GeV that must be imposed to reproduce the observed multiwavelength spectra for the four remnants. The results indicate that the observed {gamma}-ray spectra can be reproduced as a p-p interaction of the high-energy protons injected by the shell interacting with the MC with the dense matter, whereas the radio emission is produced via synchrotron radiation of the injected electrons from the other part of the shell for the four middle-aged SNRs.

• OSTI ID: 21587533
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 1 Vol. 739; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BARYONS
BREMSSTRAHLUNG
CLOUDS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELECTRONS
ELEMENTARY PARTICLES
EMISSION
FERMIONS
GAMMA SPECTRA
HADRONS
INTERACTIONS
LEPTONS
NUCLEONS
PROTONS
RADIATIONS
SPECTRA
SUPERNOVA REMNANTS
SYNCHROTRON RADIATION