Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....111.1861b&link_type=abstract
Astronomical Journal v.111, p.1861
Astronomy and Astrophysics
Astronomy
52
Galaxies: Individual: Ngc 4314, Galaxies: Structure, Galaxies: Kinematics And Dynamics
Scientific paper
NGC 4314 is an early-type barred galaxy containing a nuclear ring of recent star formation. We present CO(1-0) interferometer data of the bar and circumnuclear region with 2.3" x 2.2" spatial resolution and 13 km s^-1^ velocity resolution acquired at the Owens Valley Radio Observatory. These data reveal a clumpy circumnuclear ring of molecular gas. We also find a peak of CO inside the ring within 2" of the optical center that is not associated with massive star formation. We construct a rotation curve from these CO kinematic data and the mass model of Combes et al. (A&A, 259,1, L27 (1992)]. Using this rotation curve, we have identified the location of orbital resonances in the galaxy. Assuming that the bar ends at corotation, the circumnuclear ring of star formation lies between two Inner Lindblad Resonances, while the nuclear stellar bar ends near the IILR. Deviations from circular motion are detected just beyond the CO and Hα ring, where the dust lanes along the leading edge of the bar intersect the nuclear ring. These non-circular motions along the minor axis correspond to radially inward streaming motions at speeds of 20- 90 km s^-1^ and clearly show inflowing gas feeding an ILR ring. There are bright H II regions near the ends of this inflow region, perhaps indicating triggering of star formation by the inflow.
Benedict Fritz G.
Kenney Jeffrey D. P.
Smith Beverly J.
No associations
LandOfFree
NGC 4314. III. Inflowing Molecular Gas Feeding a Nuclear Ring of Star Formation 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 NGC 4314. III. Inflowing Molecular Gas Feeding a Nuclear Ring of Star Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and NGC 4314. III. Inflowing Molecular Gas Feeding a Nuclear Ring of Star Formation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1356229