The time evolution of the radio supernovae in Arp 220

Details The time evolution of the radio supernovae in Arp 220 The time evolution of the radio supernovae in Arp 220

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001iaus..205..386l&link_type=abstract

Galaxies and their Constituents at the Highest Angular Resolutions, Proceedings of IAU Symposium #205, held 15-18 August 2000 at

Computer Science

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Scientific paper

Since the unexpected discovery of 12 compact radio sources in one of the nuclei of Arp220 we have been performing multi-frequency monitoring of the structure using global VLBI and the VLBA alone. We now have 5 epochs of data and can demonstrate that the fluxes of the radio sources are, in general, decreasing monotonically. They also have very steep spectra. Both facts support our earlier supposition that these are indeed highly luminous radi supernovae. In Smith et al (1998, ApJ, 493, L17) we predicted a supernova rate of approximately 2 per year, this has not been observed and so our model of the star formation rate in Arp220 must be revised.

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