We present evidence that spiral galaxies in the Virgo Cluster have systematically higher interstellar abundances than comparable field galaxies. This conclusion is based on spectra of H II regions in five Virgo spirals of type Sc. A possible explanation is that abundances in the field spirals are strongly affected by infall of metal-poor gas or by radial inflow of gas from the outer H I disk. These processes are inhibited in the cluster environment, and the Virgo spirals may have evolved more nearly in the manner of the closed box " simple model" of chemical evolution.
- Galaxies: abundances
- Galaxies: clustering
- Galaxies: evolution
- Galaxies: interstellar matter
- Nebulae: H II regions