Detection of Ionized Gas in the Globular Cluster 47 Tucanae

  title={Detection of Ionized Gas in the Globular Cluster 47 Tucanae},
  author={P. C. F REIRE and M. K RAMER},
We report the detection of ionized intracluster gas in the globular cluster 47 Tucanae. Pulsars in this cluster with a negative period derivative, which must lie in the distant half of the cluster, have significantly higher measured integrated electron column densities than the pulsars with a positive period derivative. We derive the plasma density within the central few pc of the cluster using two different methods which yield consistent values. Our best estimate of n e = 0.067 ± 0.015 cm −3… CONTINUE READING