Radio continuum observations of LMC SNR J0550-6823

L. M. Bozzetto, M. D. Filipovic, E. J. Crawford, J. L. Payne, A. Y. De Horta, M. Stupar

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    Abstract

    We report on new Australia Telescope Compact Array (ATCA) observations of the Large Magellanic Cloud (LMC) supernova remnant (SNR) J0550-6823 (DEM L328). This object is a typical horseshoe SNR with a diameter of 373″ ×282″ ±4″ (90×68±1 pc), making it one of the largest known SNRs in the Local Group. We estimate a relatively steep radio spectral index of α = -0.79 ± 0.27. However, its stronger than expected polarisation of 50% ± 10% is atypical for older and more evolved SNRs. We also note a strong correlation between [O III] and radio images, classifying this SNR as oxygen dominant.
    Original languageEnglish
    Pages (from-to)41-46
    Number of pages6
    JournalRevista Mexicana de Astronomia y Astrofisica
    Volume48
    Issue number1
    Publication statusPublished - 2012

    Keywords

    • ISM: individual objects (DEM L328, SNR J0550-6823)
    • ISM: supernova remnants
    • Magellanic clouds

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