VLBI observations of supernova remnants in Messier 82

Abstract

We have used the European VLBI Network (EVN) at 18 cm to study five of the more compact radio sources in the starburst galaxy M82. The angular resolution of the observations is 15°mas, corresponding to 0.2 pc at the distance of M82. The observations reveal shells ranging in diameter from 40 to 90 mas to 1.4 pc), hough the strongest source (41.95+575) is only marginally resolved by these measurements (∼0×10 mas 2).