Limits on Ionized Gas in M81's Globular Clusters
  We use NSF's Karl G. Jansky Very Large Array to constrain the mass of ionized
gas in 206 globular star clusters (GCs) in M81, a nearby spiral galaxy. We
detect none of the GCs and impose a typical gas-mass upper limit of 550 solar
masses (3-sigma). These findings bear on GC evolution in M81.
