2012A&A...541A.153T


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.17CET15:05:26

2012A&A...541A.153T - Astronomy and Astrophysics, volume 541A, 153-153 (2012/5-1)

Time-dependent escape of cosmic rays from supernova remnants, and their interaction with dense media.

TELEZHINSKY I., DWARKADAS V.V. and POHL M.

Abstract (from CDS):

Supernova remnants (SNRs) are thought to be the main source of Galactic cosmic rays (CRs) up to the ``knee'' in CR spectrum. During the evolution of a SNR, the bulk of the CRs are confined inside the SNR shell. The highest-energy particles leave the system continuously, while the remaining adiabatically cooled particles are released when the SNR has expanded sufficiently and decelerated so that the magnetic field at the shock is no longer able to confine them. Particles escaping from the parent system may interact with nearby molecular clouds, producing γ-rays in the process via pion decay. The soft gamma-ray spectra observed for a number of SNRs interacting with molecular clouds, however, challenge current theories of non-linear particle acceleration that predict harder spectra. We study how the spectrum of escaped particles depends on the time-dependent acceleration history in both Type Ia and core-collapse SNRs, as well as on different assumptions about the diffusion coefficient in the vicinity of the SNR. We solve the CR transport equation in a test-particle approach combined with numerical simulations of SNR evolution. We extend our method for calculating the CR acceleration in SNRs to trace the escaped particles in a large volume around SNRs. We calculate the evolution of the spectra of CRs that have escaped from a SNR into a molecular cloud or dense shell for two diffusion models. We find a strong confinement of CRs in a close region around the SNR, and a strong dilution effect for CRs that were able to propagate out as far as a few SNR radii.

Abstract Copyright:

Journal keyword(s): ISM: supernova remnants - ISM: clouds - cosmic rays

Simbad objects: 14

goto Full paper

goto View the reference in ADS

Number of rows : 14

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1046 1
2 IC 443 SNR 06 18 02.7 +22 39 36           ~ 1073 1
3 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 388 2
4 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SN.IIb 1228 1
5 ESO 134-11 HII 14 40 29 -62 38.7           ~ 493 1
6 NAME Lupus SN SNR 15 02 22.1 -42 05 49           SNIa 1181 1
7 SNR G347.3-00.5 SNR 17 12 27 -39 41.2           ~ 582 1
8 SNR G348.5+00.1 SNR 17 14 31.780 -38 28 34.50           ~ 189 3
9 SNR G349.7+00.2 SNR 17 18 10.160 -37 18 53.80           ~ 159 0
10 SNR G006.4-00.1 SNR 18 01 22.7 -23 17 20           ~ 631 1
11 W 30 SNR 18 05 38 -21 36.7           ~ 155 1
12 3C 391.0 Rad 18 49 23.3 -00 55 38           ~ 311 2
13 SNR G034.6-00.5 SNR 18 56 10.650 +01 13 21.30           ~ 798 2
14 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2338 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2012A&A...541A.153T and select 'bookmark this link' or equivalent in the popup menu


2019.11.17-15:05:26

© Université de Strasbourg/CNRS

    • Contact