Second Epoch Global VLBI Observations of Compact Radio Sources in the M82 Starburst Galaxy

Details Second Epoch Global VLBI Observations of Compact Radio Sources in the M82 Starburst Galaxy Second Epoch Global VLBI Observations of Compact Radio Sources in the M82 Starburst Galaxy

2004-05-06

arxiv.org/abs/astro-ph/0405114v1

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures. To be published on the accompanying CD of the Proceedings of IAU Colloquium 192: Supernovae

Scientific paper

We have presented the results of a second epoch of global Very Long Baseline Interferometry observations, taken on 23 February 2001 at a wavelength of 18 cm, of the central kiloparsec of the nearby starburst galaxy Messier 82. These observations were aimed at studying the structural and flux evolution of some of the compact radio sources in the central region that have been identified as supernova remnants. The objects 41.95+575 and 43.31+592 have been studied, expansion velocities of 2500 +/- 1200 km/s and 7350 +/- 2100 km/s respectively have been derived. Flux densities of 31.1 +/- 0.3 mJy and 17.4 +/- 0.3 mJy have been measured for the two objects. These results are consistent with measurements and predictions from previous epochs.

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