| Abstract | The investigation is based on radial velocity observations of 25 bright-line condensations well dis- tributed over the spiral (P1. I), and upon several long exposures that record the spectrum of the unre- solved nebulosity of the nuclear region. As preliminary steps in the derivation of the relation between rotational velocity and nuclear distance, the velocity of the system is found to be - 167 ± 5 km/sec from thre ... |
