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.
@article{arxiv.1710.08222,
title = {Multi-Epoch Radio Imaging of gamma-ray Nova V959 Mon},
author = {F. Healy and T. J. O Brien and R. Beswick and A. Avison and M. K. Argo},
journal= {arXiv preprint arXiv:1710.08222},
year = {2017}
}