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Fig. 7


1 GHz Surface brightness-to-diameter diagram from Berezhko & Völk (2004), with SNR J0530–7007 added. The evolutionary tracks are for ISM densities of NH = 3, 0.3 and 0.003 cm-3 and explosion energies of ESN = 0.25, 1 and 3  ×  1051 erg.

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