Fig. 3.
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Our sample of broadened emission lines that have detectable Hα, [N II]λ6583 and [S II]λλ6717,6731 emission lines and that we identify as SNRs. Colour of the points represent the FWHM of the [N II]λ6583 with the instrumental broadening removed. The different regions in the figure have been adopted from Meaburn et al. 2010. Most of our sample aligns with the SNR region with log(Hα/[S II]) < 0.5.
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