Expected gamma-ray emission of supernova remnant SN 1987A

Abstract

A nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants is employed to re-examine the nonthermal properties of the remnant of SN 1987A for an extended evolutionary period of 5--100 yr. It is shown that an efficient production of nuclear CRs leads to a strong modification of the outer supernova remnant shock and to a large downstream magnetic field $B_{\mathrm{d}}\approx 20$ mG. The shock modification and the strong field are required to yield the steep radio emission spectrum observed, as well as to considerable synchrotron cooling of high energy electrons which diminishes their X-ray synchrotron flux. These features are also consistent with the existing X-ray observations. The expected \gr energy flux at TeV-energies at the current epoch is nearly ${\epsilon }_{\gamma }{F}_{\gamma }\approx 4\times 10^{-13}$ erg cm${}^2$s${}^{-1}$ under reasonable assumptions about the overall magnetic field topology and the turbulent perturbations of this field. The general nonthermal strength of the source is expected to increase roughly by a factor of two over the next 15 to 20 yrs; thereafter it should decrease with time in a secular form.

7 pages, 5 figures, accepted for publication in ApJ, a number of changes have been made, even though these are not changing the main results of the paper

References in corpus (8)

• First detection of VHE gamma-rays from SN 1006 by H.E.S.S
• Variation of cosmic ray injection across supernova shocks
• Fourier Modeling of the Radio Torus Surrounding Supernova 1987A
• Cosmic Ray Acceleration by Supernova Shocks
• A 20 Year Radio Light Curve for the Young Supernova Remnant G1.9+0.3
• Magnetic field in supernova remnant SN 1987A
• Chandra Observations of Supernova 1987A
• Nonthermal properties of supernova remnant G1.9+0.3

Cited by in corpus (8)

• Hard X-ray emission lines from the decay of Ti-44 in the remnant of supernova 1987A
• Spectral and morphological analysis of the remnant of Supernova 1987A with ALMA & ATCA
• Multi-dimensional simulations of the expanding supernova remnant of SN 1987A
• Thermal Emission and Radioactive Lines, but No Pulsar, in the Broadband X-Ray Spectrum of Supernova 1987A
• Sensitivity of the Cherenkov Telescope Array to TeV photon emission from the Large Magellanic Cloud
• The first days of type II-P core collapse supernovae in the gamma-ray range
• Near-infrared evolution of the equatorial ring of SN 1987A
• A Possible Gamma-Ray Enhancement Event in Tycho's Supernova Remnant