2009A&A...505..641B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.24CEST17:47:31

2009A&A...505..641B - Astronomy and Astrophysics, volume 505, 641-654 (2009/10-2)

Theory of cosmic ray and γ-ray production in the supernova remnant RX J0852.0-4622.

BEREZHKO E.G., PUEHLHOFER G. and VOELK H.J.

Abstract (from CDS):

The properties of the Galactic supernova remnant (SNR) RX J0852.0-4622 are theoretically analysed. An explicitly time-dependent, nonlinear kinetic model of cosmic ray (CR) acceleration in SNRs is used to describe the properties of SNR RX J0852.0-4622, the accelerated CRs, and the nonthermal emission. The source is assumed to be at a distance of ≃1kpc in the wind bubble of a massive progenitor star. An estimate of the thermal X-ray flux in this configuration is given. We find that the overall synchrotron spectrum of RX J0852.0-4622 as well as the filamentary structures in hard X-rays lead to an amplified magnetic field B>100µG in the SNR interior. This implies that the leptonic very high energy (VHE) γ-ray emission is suppressed, and that the VHE γ-rays are hadronically dominated. The energy spectrum of protons produced over the lifetime of the remnant until now may well reach ``knee'' energies. The derived γ-ray morphology is consistent with the HESS measurements. The amount of energy in energetic particles corresponds to about 35% of the hydrodynamic explosion energy. A remaining uncertainty concerns the thermal X-ray flux at 1keV. A rough estimate, which is possibly not quite appropriate for the assumed wind bubble configuration, is found to be higher than the nonthermal flux at this energy. It is concluded that this SNR expanding into the wind bubble of a massive star in a dense gas environment can be a hadronic γ-ray source that is consistent with all existing multiwavelength constraints, except possibly the thermal X-ray emission.

Abstract Copyright:

Journal keyword(s): ISM: cosmic rays - acceleration of particles - shock waves - supernovae: individual: SNR RX J0852.0-4622 - radiation mechanisms: non-thermal - gamma rays: theory

Simbad objects: 12

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Number of rows : 12

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 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5652 4
2 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1124 2
3 NAME Vela Pulsar Psr 08 35 20.65525 -45 10 35.1545           ~ 2074 1
4 NAME Vela Jr SN SNR 08 52.0 -46 20           ~ 408 2
5 2XMM J085201.4-461753 X 08 52 01.4 -46 17 53           ~ 40 1
6 NAME VELA MOL RIDGE MoC 08 53 -45.0           ~ 134 0
7 NAME Vela Z Rad 08 53 30 -45 35.0           ~ 29 0
8 PSR J0855-4644 Psr 08 55 36.18 -46 44 13.4           ~ 35 1
9 ESO 134-11 HII 14 40 29 -62 38.7           ~ 508 1
10 NAME Lupus SN SNR 15 02 22.1 -42 05 49           ~ 1219 1
11 SNR G347.3-00.5 SNR 17 12 27 -39 41.2           ~ 619 1
12 NAME Cas A SNR 23 23 24.000 +58 48 54.00           ~ 2440 1

    Equat.    Gal    SGal    Ecl

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2020.10.24-17:47:31

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