2004A&A...421.1021V


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.25CET10:58:19

2004A&A...421.1021V - Astronomy and Astrophysics, volume 421, 1021-1030 (2004/7-3)

Non-thermal X-ray emission from young supernova remnants.

VAN DER SWALUW E. and ACHTERBERG A.

Abstract (from CDS):

The Galactic (nucleonic) cosmic-ray spectrum up to the knee (E∼1015eV) is attributed to acceleration processes that take place near the external shocks around supernova remnants (SNRs). Theoretical predictions based on the theory of diffusive shock acceleration give a similar estimate for the maximum particle energy that can be reached at these shocks: E∼1014-1015eV. Electrons with energies E ∼1014eV radiate X-ray photons in the ∼10-100µG magnetic fields present in many young SNRs. These electrons near the knee give rise to a non-thermal X-ray component in the spectrum of young supernova remnants. Recent observations of SN1006 and G347.3-0.5 confirm this prediction. We have combined hydrodynamical calculations of the evolution of a young remnant with an algorithm that simultaneously calculates the acceleration of electrons, their radiation losses and the synchrotron spectrum of a young supernova remnant. The electrons are treated using a test-particle approximation. We give a semi-analytical estimate of the maximum electron energy and typical synchrotron frequencies for young remnants at the end of the free-expansion stage of their evolution. We present spectra of the energy distribution of the electrons in a young supernova remnant, and construct a synchrotron map in the X-ray domain, assuming Bohm diffusion within the remnant and a shock-compressed magnetic field.

Abstract Copyright:

Journal keyword(s): ISM: cosmic rays - ISM: supernova remnants - shock waves - acceleration of particles

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1085 1
2 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 409 2
3 ESO 134-11 HII 14 40 29 -62 38.7           ~ 510 1
4 SNR G315.0-02.3 SNR 14 43 00 -62 30.0           ~ 346 1
5 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1219 1
6 SNR G347.3-00.5 SNR 17 12 27 -39 41.2           ~ 620 1
7 NAME Kepler SNR Rad 17 30 35.976 -21 28 56.23           ~ 718 4
8 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2450 1

    Equat.    Gal    SGal    Ecl

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2020.11.25-10:58:19

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