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Global VLBI Observations of M82

Published online by Cambridge University Press:  13 May 2016

A.R. McDonald ,
T.W. B. Muxlow ,
A. Pedlar ,
M.A. Garrett  and
K.A. Wills
A.R. McDonald
Affiliation:
University of Manchester, Jodrell Bank Observatory, Lower Withington, Macclesfield, Cheshire SK11 9DL, UK
T.W. B. Muxlow
Affiliation:
University of Manchester, Jodrell Bank Observatory, Lower Withington, Macclesfield, Cheshire SK11 9DL, UK
A. Pedlar
Affiliation:
University of Manchester, Jodrell Bank Observatory, Lower Withington, Macclesfield, Cheshire SK11 9DL, UK
M.A. Garrett
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 Dwingeloo, The Netherlands
K.A. Wills
Affiliation:
Department of Physics, University of Sheffield, Sheffield S3 7RH, UK

Abstract

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Images are presented of the starburst galaxy M82 from a 20-station global VLBI experiment with an angular resolution of up to 3 mas. These images resolve several of the sources into a number of components and with future VLBI experiments the expansion of these components may be tracked on a ∼2 year timescale. Expansion of one of the brightest remnants in M82 has already been measured on a ∼10 year timescale using the European VLBI Network (EVN) alone and an expansion rate of 10,000 km s−1 calculated. Furthermore, limits on the deceleration of this remnant have been deduced. Further VLBI experiments will be able to better constrain the deceleration of the remnants on a ∼10 year timescale as they continue to interact with the interstellar medium in M82.

Type
Supernovae, Pulsars, and the Interstellar Medium
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 374 - 375
Copyright
Copyright © Astronomical Society of the Pacific 2001 

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