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Luminous Supernova Remnant Candidates in M82 and The Physical Properties of The Variable Radio Source 41.9+58

Published online by Cambridge University Press:  04 August 2017

P. P. Kronberg  and
P. Biermann
P. P. Kronberg
Affiliation:
David Dunlap Observatory and Scarborough College, University of Toronto
P. Biermann
Affiliation:
Max-Planck-Institut für Radioastronomie, Bonn

Abstract

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Large numbers (∼30) of supernova remnant candidates have been revealed in new VLA maps of the inner 600 pc of M82 with subarcsecond resolution. The flux density decrease of the bright source 41.9+58 in the M82 nuclear region is found to be occurring with an approximately constant spectral index of −0.9 at ν≳3 GHz, and the low frequency turnover has moved from ∼700 MHz in 1974–1975 to <400 MHz in 1979–81.

A model of 41.9+58 is proposed in which it is, at least initially confined by its own hot (∼108K) pre-SN ejecta, and its relativistic particles are accelerated by a pulsar at its centre.

Type
VI. Supernova Remnants in Other Galaxies
Information
Symposium - International Astronomical Union , Volume 101: Supernova Remnants and Their X-Ray Emission , 1983 , pp. 583 - 590
Copyright
Copyright © Reidel 1983 

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