Globular cluster winds

Current evolutionary theory indicates that the evolving stars in globular clusters arrive on the horizontal branch with approx. 30% less mass than they had on the main sequence. If, as seems likely, this mass loss results from the outflow of unprocessed material at the stellar surface during the giant stage, and if the ejected mass were retained within the cluster during the giant stage, and if the ejected mass were retained within the cluster between successive sweeps through the galactic plane (about 108 yr), sufficient hydrogen (100-2000Msub(o)) should accumulate for detection. Radio searches have failed to find evidence for either neutral or ionized gas. The search was therefore extended into the optical region and the time independant gas flow models were calculated to resolve this anomaly. (R.L.)