MMT spectra of SNRs and SNR candidates in M33
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To date, over 220 emission nebulae in M33 have been identified as supernova remnants (SNRs) or SNR candidates, principally through [SII]:H{alpha} line ratios that are elevated...
截至目前,在三角座星系(M33)中已有超过220个发射星云被证认为超新星遗迹(SNRs)或超新星遗迹候选体,此类证认主要基于[SII]:Hα谱线强度比偏高这一特征……



