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Published online by Cambridge University Press: 07 August 2017
The high rate of gas consumption and evidence for massive stars in NGC 253, implies a prodigious star formation and supernovae rate. However there is no optical confirmation of these supernovae, presumably due to the enormous dust obscuration present. Radio observations (Antonucci and Ulvestad 1988) reveal compact radio sources i.e. young supernova remnants (SNRs).