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- W3100910270 abstract "We calculated synchrotron radio emission and |$ gamma $|-ray emission due to bremsstrahlung, inverse-Compton scattering, and |$ pi ^0$|-decay from the remnant of supernova that exploded in the circumstellar matter (CSM) formed by the progenitor's stellar wind. This sort of situation is a possible origin of mixed-morphology supernova remnants (SNRs), like W 49B, which exhibit recombination-radiation spectra in X-ray emission. We assumed that the CSM of 1.5 |$ M_{odot}$| exists at 0.07–3 pc away from the supernova in the interstellar medium (ISM) of density 0.016 cm|$ ^{-3}$| . When the blast wave breaks out of the CSM into the ISM, its velocity rapidly increases, and hence particle acceleration is enhanced. The maximum energy of protons reaches |$ sim$| 1300 TeV just after the break-out with |$ sim$| 0.5% of the explosion energy. We considered the non-thermal emission from the blast-shocked ISM shell after the break-out. Synchrotron radio flux at 1 GHz is tens of Jy, comparable to that observed from mixed-morphology SNRs. Because of low density, the |$ gamma $|-ray luminosity is dominated by inverse-Compton scattering, which is higher than the |$ pi ^0$|-decay luminosity by an order of magnitude. The total |$ gamma $|-ray luminosity, including bremsstrahlung, is on the order of 10|$ ^{33}$| erg s|$ ^{-1}$| lower than the typical value of 10|$ ^{35}$| –10|$ ^{36}$| erg s|$ ^{-1}$| observed from mixed-morphology SNRs. However, if, e.g., |$ sim$| 10% of accelerated protons interact with some matter of density of |$ sim$| 100 cm|$ ^{-3}$| , the |$ pi ^0$|-decay |$ gamma $|-ray luminosity would be enhanced to be comparable with the observed value." @default.
- W3100910270 created "2020-11-23" @default.
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- W3100910270 date "2013-06-25" @default.
- W3100910270 modified "2023-09-26" @default.
- W3100910270 title "Non-Thermal Radio and Gamma-Ray Emissions from a Supernova Remnant by Blast Wave Breaking Out of the Circumstellar Matter" @default.
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- W3100910270 doi "https://doi.org/10.1093/pasj/65.3.69" @default.
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