NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-19 T07:35:32 PDT
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For refcode 1990MNRAS.242..529W:
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Copyright by Royal Astronomical Society. 1990MNRAS.242..529W Shell-like structure in 41.9 + 58, a powerful supernova remnant in M82 P. N. Wilkinson University of Manchester, Nuffield Radio Astronomy Laboratories, Jodrell Bank, Macclesfeld, Cheshire SK11 9DL A. G. de Bruyn Radiosterrenwacht, Postbus 2, 7900 AA Dwingeloo, The Netherlands Accepted 1989 July 27. Received 1989 July 25; in original form 1989 June 12 SUMMARY An EVN map of the compact radio source 41.9 + 58 in M82 reveals a distorted shell-like structure with dimensions 0.56 x 0.32 pc. This map, together with a limit on the present expansion velocity ( < 6500 km s^-1^ along the major axis) and the steady decay of the flux density (8.5 per cent yr^-1^ for the past 25 yr), convinces us that 41.9 + 58 is a powerful supernova remnant whose progenitor probably exploded 40-50 yr ago. Along with other examples, 41.9 + 58 has exhibited a radio luminosity 50-100 times greater than normal for remnants associated with optical type II supernovae and we suggest that such objects be classified as 'radio hypernova remnants'.
Retrieve 12 NED objects in this reference.
Please click here for ADS abstract

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