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2011MNRAS.410.1423I - Mon. Not. R. Astron. Soc., 410, 1423-1440 (2011/January-3)
The JCMT nearby galaxies legacy survey – V. The CO(J= 3–2) distribution and molecular outflow in NGC 4631.
IRWIN J.A., WILSON C.D., WIEGERT T., BENDO G.J., WARREN B.E., WANG Q.D., ISRAEL F.P., SERJEANT S., KNAPEN J.H., BRINKS E., TILANUS R.P.J., VAN DER WERF P. and MUHLE S.
Abstract (from CDS):
The velocity field is dominated by a steeply rising rotation curve in the region of the central molecular ring followed by a flatter curve in the disc. A very steep gradient in the rotation curve is observed at the nucleus, providing the first evidence for a central concentration of mass: Mdyn= 5 {x} 107 M☉within a radius of 282 pc. The velocity field shows anomalous features indicating the presence of molecular outflows; one of them is associated with a previously observed CO(J= 1–0) expanding shell. Consistent with these outflows is the presence of a thick (z up to 1.4 kpc) CO(J= 3–2) disc. We suggest that the interaction between NGC 4631 and its companion(s) has agitated the disc and also initiated star formation which was likely higher in the past than it is now. These may be necessary conditions for seeing prominent haloes.
Abstract Copyright: 2010 The Authors. Journal compilation2010 RAS
Journal keyword(s): ISM: bubbles - ISM: molecules - ISM: structure - galaxies: haloes - galaxies: individual: NGC 4631 - galaxies: ISM
Simbad objects: 10
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