| Title | Neutral hydrogen observations of the barred spiral galaxy NGC 5383. |
| Authors | Sancisi, R.; Allen, R. J.; Sullivan, W. T., III |
| Bibcode | 1979A&A....78..217S Search ADS ↗ |
| Abstract | Summary. The large-scale density and radial velocity distributions of neutral hydrogen have been derived in the barred spiral galaxy NGC 5383 (SBb) from aperture synthesis observations at Westerbork. The H i is largely concentrated in the bright central parts, with maxima in the direction of the centre and of the arms, and appears to be deficient in the region of the bar. The H i can be traced to column densities of 1 1 ()2O cm -2 at twice the De Vaucouleurs radius. The velocity field in the outer parts shows the pattern expected for an axisymmetric, differentially rotating disk. The rotation curve is approximately flat at a value of 210 km 1 out to the last detected point. Velocity deviations from circular motion of the order of 50-100 km 1 found near the bar are similar to those in recent optical studies. These deviations can be ascribed to the dynamical effect of the bar. Another barred spiral galaxy (UGC 8877), of much smaller angular size and located 3' south of NGC 5383, has also been detected in Hi. Its systemic velocity is 115 km s ' in excess of that of NGC 5383. Key words: galaxies - 21-cm radiation - barred spiral - galaxy dynamics |
| Objects | 2 Objects Search NED ↙ |
