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Compact Array Mapping of the Nuclear Starburst in NGC 7552

  • Duncan A. Forbes (a1), Ray P. Norris (a2), Gerry M. Williger (a3) and R. Chris Smith (a3)

Abstract

We discuss new observations of the starburst galaxy NGC 7552. From optical and near–infrared colour maps we find a red, dusty circumnuclear ring. High-resolution radio mapping from the ATCA reveals the same ring, and a number of bright blobs (probably SNRs). The ring is probably associated with gas and dust which have lost angular momenta due to torques in the bar potential and settled at the inner Lindblad resonance. These circumnuclear starburst rings may be relatively common (when mapped without the obscuring affects of dust) and may play a role in collimating material of a nuclear outflow.

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References

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Barnes, J. E., & Hernquist, L. 1991, ApJ, 370, L65
Feinstein, C., Vega, I., Mendez, M., & Forte, J. C. 1990, A&A, 239, 90
Forbes, D. A., Boisson, C., & Ward, M. J. 1992, submitted to MNRAS
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Koribalski, B., Dickey, J. M., & Mebold, U. 1992, submitted to ApJL
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Noguchi, M. 1988, A&A, 203, 259
Phillips, A. C. 1992, in preparation
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