Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...484..664t&link_type=abstract
Astrophysical Journal v.484, p.664
Astronomy and Astrophysics
Astronomy
16
Galaxies: Individual Ngc Number: Ngc 7331, Galaxies: Ism, Galaxies: Starburst, Galaxies: Structure, Radio Lines: Galaxies
Scientific paper
We present the result of the high-resolution CO observations of the nearby "poststarburst" galaxy NGC 7331 obtained with the Nobeyama Millimeter Array (NMA). The molecular gas is distributed in two bowlike structures, and these seem to be parts of the ringlike structure, which was also seen in the radio continuum. The ring has a radius of ~3 kpc, corresponding to the turnover radius of the rotation curves obtained both by radio and optical observations. We could not detect the CO emission in the central region, although the central concentrations of molecular gas were found in other "poststarburst" galaxies, NGC 4736 and NGC 5055. The distribution of mass surface density in NGC 7331 is different from that of the critical surface density for disk stability (where the disk is unstable and breaks up), although the molecular gas in the active star-forming ring is unstable and that in the central poststarburst region is stable. This suggests that the global molecular gas distribution in NGC 7331 is not controlled by the disk stability. The central hole of molecular gas in NGC 7331 might be formed by gas consumption due to the long evolution after the past starburst event.
Shioya Yasuhiro
Tosaki Tomoka
No associations
LandOfFree
Molecular Gas in the Poststarburst Galaxy NGC 7331 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 Molecular Gas in the Poststarburst Galaxy NGC 7331, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular Gas in the Poststarburst Galaxy NGC 7331 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1185516