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

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Volume 505 / No 2 (October II 2009)

A&A, 505 2 (2009) 641-654

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Table 1:

Key model parameters, and corresponding spectral, dynamical, and morphological values expected from the calculations.
d	1 kpc
$R_{\rm s}$	17.5 pc
$B_{\rm d}$ from X-ray filaments	139 $~{\rm\mu G}$
$E_{{\rm sn}}$	$1.3 \times 10^{51}~{\rm erg}$
$M_{\rm ej}$	$3.5~M_{\odot}$
$N_{{\rm g}}(R_{{\rm s}})$	$0.24~{\rm cm^{-3}}$
$N_{{\rm g}}(r=0)$	$0.003~{\rm cm^{-3}}$
k	8
B₀	$20~{\rm\mu G}$
$\eta$	$3 \times 10^{-4}$
$K_{\rm ep}$	$3 \times 10^{-4}$
$f_{{\rm re}}$	1
$t_{{\rm sn}}$	3745 yr
$V_{{\rm s}}(t_{{\rm sn}})$	$1316~{\rm km~s^{-1}}$
$\sigma(t_{{\rm sn}})$	5.2
$\sigma_{{\rm s}}(t_{{\rm sn}})$	3.1
$M_{\rm s}(t_{{\rm sn}})$	$25~M_{\odot}$
$E_{{\rm c}}(t_{{\rm sn}})$	$4.6 \times 10^{50}~{\rm erg}$
$B_{{\rm d}}(t_{{\rm sn}})$ (= $\sigma B_{0}$ )	$104~{\rm\mu G}$
$P_{{\rm c}}/(\rho_{0}V_{{\rm s}}^{2})$	0.145
$B_{0}^{2}/(8\pi P_{{\rm c}})$	$6.5\times 10^{-3}$

Parameter description: the quantities d and $R_{\rm s}$ denote the assumed distance and the radius of the source, respectively, $B_{\rm d}$ is the internal magnetic field strength, as determined from the thickness of observed X-ray filaments cf. Eq. (1), and $E_{{\rm sn}}$ is the total hydrodynamic explosion energy; $M_{\rm ej}$ , $M_{\rm s}(t_{{\rm sn}})$ , $N_{{\rm g}}(R_{{\rm s}})$ , and $N_{{\rm g}}(r=0)$ are the ejected mass, the swept-up mass, the circumstellar gas number density at the SNR shock, and the number density at the centre, respectively; k is the power law index of the ejecta velocity distribution; B₀ is the assumed amplified magnetic field strength in the upstream region of the shock precursor, while $\eta$ and $K_{\rm ep}$ denote the assumed proton injection rate and energetic electron-to-proton ratio, respectively; $t_{{\rm sn}}$ is the calculated age of the SNR; $V_{{\rm s}}(t_{{\rm sn}})$ , $\sigma(t_{{\rm sn}})$ , $\sigma_{{\rm s}}(t_{{\rm sn}})$ , $E_{{\rm c}}(t_{{\rm sn}})$ , and $B_{{\rm d}}(t_{{\rm sn}})$ are the resulting values of the subshock velocity, the total compression ratio, the subshock compression ratio, the total nonthermal energy, and the downstream magnetic field strength, respectively. Finally, $P_{\rm c}$ and $\rho_0 = m_{\rm p}N_{\rm g}(R_{\rm s})$ denote the postshock pressure of accelerated particles and postshock mass density of the gas, respectively.

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