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    Wide-field Global VLBI and MERLIN combined monitoring of supernova remnants in M82

    Access Status
    Open access via publisher
    Authors
    Fenech, D.
    Beswick, R.
    Muxlow, T.
    Pedlar, A.
    Argo, Megan
    Date
    2010
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Fenech, D. and Beswick, R. and Muxlow, T.W.B. and Pedlar, A. and Argo, M.K. 2010. Wide-field Global VLBI and MERLIN combined monitoring of supernova remnants in M82. Monthly Notices of the Royal Astronomical Society. 408 (1): pp. 607-621.
    Source Title
    Monthly Notices of the Royal Astronomical Society
    DOI
    10.1111/j.1365-2966.2010.17144.x
    ISSN
    0035-8711
    School
    Curtin Institute of Radio Astronomy
    URI
    http://hdl.handle.net/20.500.11937/32819
    Collection
    • Curtin Research Publications
    Abstract

    From a combination of Multi-Element Radio-Linked Interferometer Network (MERLIN) and global Very Long Baseline Interferometry (VLBI) observations of the starburst galaxy M82, images of 36 discrete sources at resolutions ranging from ∼3 to ∼80 mas at 1.7 GHz are presented. Of these 36 sources, 32 are identified as supernova remnants, two are H ii regions and three remain unclassified. Sizes, flux densities and radio brightnesses are given for all of the detected sources. Additionally, global VLBI only data from this project are used to image four of the most compact radio sources. These data provide a fifth epoch of VLBI observations of these sources, covering a 19-yr time-line. In particular, the continued expansion of one of the youngest supernova remnants, 43.31+59.3, is discussed. The deceleration parameter is a power-law index used to represent the time evolution of the size of a supernova remnant. For the source 43.31+59.3, a lower limit to the deceleration parameter is calculated to be 0.53 ± 0.06, based on a lower limit of the age of this source.

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