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Paper: The Western Nucleus of Arp 220: Monitoring its Maser Line and Continuum Structures
Volume: 320, The Neutral ISM in Starburst Galaxies
Page: 195
Authors: Rovilos, E.; Diamond, P.; Lonsdale, C.; Lonsdale, C.; Smith, H.
Abstract: High angular resolution imaging of Arp 220 has revealed that the small scale continuum emission breaks down into several compact components, identified as radio supernovae. Their existence proves that the energetically important source in the core of Arp 220 is a massive starburst. We have monitored the supernovae using the VLBA for a period of 6.5 years and present the light curves of the most luminous sources. They seem to be decaying slower than previously thought and that might have implications in the starburst model, given that the number of new sources is also lower than predicted.
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