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

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Authors
Galvin, T.
Filipovic, M.
Tothill, N.
Crawford, E.
O Brien, A.
Seymour, Nick
Pannuti, T.
Kosakowski, A.
Sharma, B.
Date
2014
Type
Journal Article

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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.
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Astrophysics and Space Science
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Department of Physics and Astronomy
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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.