Wide-field VLBI imaging of M31 - first results

Proceedings of the 10th EVN symposium “VLBI and the new generation of radio arrays” in Manchester, UK, 21-24 September 2010
PoS (10th EVN Symposium) (2010) 019

M.K. Argo [1], J. Morgan [1], E. Lenc [2], O. Wucknitz [3], F. Mantovani [4], D. Fenech [5], S. Tingay [1]

  1. ICRAR/Curtun University, GPO Box U1987, Perth, WA 6845, Australia
  2. CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia
  3. Argelander-Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany
  4. Istituto di Radioastronomia - INAF, via Gobetti 101, 40129 Bologna, Italy
  5. Department of Physics and Astronomy, University College, London

Abstract

One of our closest neighbours, the Andromeda Galaxy (M31) has been the subject of numerous large area studies across the entire spectrum, but so far full-disk radio surveys have been conducted only at low resolution. The new wide-field capabilities of the DiFX software correlator present the possibility of imaging the entire primary beam of a VLBI array, thus enabling a high resolution wide-field study of the entire galaxy. Using the VLBA and EVN, pilot observations of M31 have been carried out with the aim of using these new wide-field techniques to characterise the population of compact components at VLBI resolution both within and behind one of our nearest neighbours. This contribution describes the observations carried out, the preliminary processing and first results.


PoS (10th EVN Symposium) (2010) 019 (link to online journal)


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6 pages, astro-ph version.


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