| Abstract | Twentyone centimeter line observations of 112 galaxies in seven clusters and in relatively isolated regions in the Coma "wall" were secured with the Arecibo telescope. These, combined with an available data base, are used to discuss the relations between the neutral gas column density, the star formation rate, the FIR, and the radio continuum emission in spiral galaxies inside and outside rich clusters. It is found that hydrogen-deficient cluster galaxies have star formation rates similar to unperturbed isolated galaxies confirming that atomic gas ablation in clusters does not alter the supply of molecular gas. The extended radio continuum emission of about 30% of cluster spirals is higher than that of isolated galaxies of similar type at any given gas surface density. A significant fraction of these galaxies is found perturbed in its H I, optical, and radio continuum morphology consistent with the hypothesis that ram pressure, along with H I ablation, could produce major morphological disturbances as well as enhancements in the diffuse synchrotron emission due to magnetic field compression. |
