Radio-continuum study of the nearby sculptor group galaxies. Part 3: NGC 7793 at λ=12.2, 6 and 3 cm

Galvin, T. and Filipovic, M. and Tothill, N. and Crawford, E. and O Brien, A. and Seymour, N. and Pannuti, T. et al. 2014. Radio-continuum study of the nearby sculptor group galaxies. Part 3: NGC 7793 at λ=12.2, 6 and 3 cm. Astrophysics and Space Science. 353 (2): pp. 603-611.

Source Title

Astrophysics and Space Science

DOI

10.1007/s10509-014-2051-3

ISSN

0004-640X

School

Department of Physics and Astronomy

URI

http://hdl.handle.net/20.500.11937/41326

Collection

Curtin Research Publications

Abstract

We re-examine a series of archived centimetre radio-continuum observations (λ=16, 6 and 3 cm) focusing on NGC 7793 using the Australia Telescope Compact Array. These new images are both very sensitive (σ=0.011 mJy/beam) and feature reasonably high angular resolution (down to <3″). Using these images, a total of 76 discrete radio sources are identified, of which 57 have been classified. We also studied the radio component of the micro-quasar NGC7793-S26 which shows two distinct regions of somewhat steep spectral index (α) between −0.3 and −0.7.