Multi-Epoch Radio Imaging of gamma-ray Nova V959 Mon

F. Healy, T. J. O'Brien, R. Beswick, A. Avison, M. K. Argo

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    V959 Mon (Nova Mon 2012) was first detected by the Fermi Large Area Telescope in June 2012, as a transient gamma-ray source. Subsequent optical observations showed that this gamma-ray emission was due to a classical nova explosion. Multi-frequency observations of V959 Mon with the VLA between June and September 2012 revealed dramatic brightening, and a spectrum that steepened with increasing frequency. High resolution radio images of V959 Mon using e-MERLIN are presented here, at six epochs between September 2012 and February 2014 which show morphological evolution of the source. While early e-MERLIN observations of V959 Mon show an east-west elonga- tion in the ejecta morphology, subsequent observations suggest that the ejecta become elongated in the north-south direction. Our high-resolution observations of this sur- prising evolution in the structure of V959 Mon can assist us in further understanding the behaviour and morphology of nova ejecta.
    Original languageEnglish
    Article numberstx1087
    Pages (from-to)3976-3983
    JournalMonthly Notices of the Royal Astronomical Society
    Issue number4
    Publication statusPublished - 23 Oct 2017


    • astro-ph.SR
    • astro-ph.HE


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