Astronomy and Astrophysics – Astrophysics
Scientific paper
1995-12-07
Astronomy and Astrophysics
Astrophysics
21 pages, aas2pp4 LaTeX, no figures included. Accepted for April 1 1996 ApJ. Full paper (with figures) available from http:/
Scientific paper
10.1086/177000
We have made observations of the \ion{H}{1} in the southern ringed barred spiral galaxies NGC~1433 and NGC~6300 with the Australia Telescope Compact Array (ATCA), the main goal being to test the resonance theory for the origin of these rings. NGC~1433 is the prototypical ringed barred spiral, and displays distinct \ion{H}{1}~counterparts to its nuclear ring, inner ring, outer pseudoring, and plume-like features. The $L_{4}$ and $L_{5}$ regions at corotation, as well as the bar itself, are relatively devoid of neutral atomic hydrogen. By associating the inner ring of NGC~1433 with the inner second harmonic resonance, and its outer pseudoring with the outer Lindblad resonance, we are able to infer a bar pattern speed for NGC~1433 of $26\pm5$~km~s$^{-1}$~kpc$^{-1}$. By way of contrast, NGC~6300 possesses a much more extended \ion{H}{1}~disk than NGC~1433. There is a gas ring underlying the inner pseudoring, but it is both broader and slightly larger in diameter than the optical feature. By again linking this inner ring feature to the inner second harmonic resonance, we derive a bar pattern speed for NGC~6300 of $27\pm8$~km~s$^{-1}$~kpc$^{-1}$, but in this case, neither the outer pseudoring nor the nuclear ring predicted by the resonance-ring theory can be identified in NGC~6300. Although it may be the case that the ring in NGC~6300 is not related to a resonance with the bar at all, we postulate instead that NGC~6300 is merely a less well-developed example of a resonance-ring galaxy than is NGC~1433.
Buta Ronald J.
Ryder Stuart D.
Shukla Hemant
Staveley--Smith Lister
Toledo Hector
No associations
LandOfFree
Neutral Hydrogen in the Ringed Barred Galaxies NGC 1433 and NGC 6300 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Neutral Hydrogen in the Ringed Barred Galaxies NGC 1433 and NGC 6300, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Neutral Hydrogen in the Ringed Barred Galaxies NGC 1433 and NGC 6300 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-632857