A Preliminary Survey of Collapsed Cores in Globular Clusters

@article{Djorgovski1986APS,
  title={A Preliminary Survey of Collapsed Cores in Globular Clusters},
  author={S. George Djorgovski and Ivan R. King},
  journal={The Astrophysical Journal},
  year={1986},
  volume={305}
}
This is a preliminary report on surface photometry of the major fraction of known globular clusters, to see which of them show the signs of a collapsed core. More than 20 examples, or one-fifth of the total, are found. Core classifications are given for all clusters examined. The fraction of collapsed-core clusters may be an index of how long a cluster takes to reexpand after collapse. 21 references. 

Figures and Tables from this paper

The Structure of Collapsed Cluster Cores

In order to test the prediction that many Galactic globular clusters have undergone core collapse (Lightman 1982, Cohn and Hut 1984) and should therefore have central surface brightness cusps, we

Surface photometry of globular clusters.

Much of what we know about the structure, dynamics, and evolution of globular clusters derives from their observed density profiles, and their interpretations. In this review, I will briefly describe

Primordial binaries and globular cluster evolution

MANYof the globular clusters in our Galaxy have probably undergone core collapse, and are currently re-expanding1,2. This re-expansion requires a central energy source. Previously proposed mechanisms

New Directions in Globular Cluster Modeling

Recent observations show a fascinating and abundant presence of many different types of binaries and binary remnants in globular clusters. What was a perceived dearth of binaries only a few years ago

Some clues about the dynamics of globular clusters from high-resolution observation

This review describes some of the high-resolution observations of the cores of globular clusters, obtained from the ground and with the Hubble Space Telescope (HST). Contrary to galaxies, whose

After Core Collapse. What

As our understanding of core collapse in globular clusters has improved through detailed computer simulations, attention has naturally turned to dynamical evolution of globular clusters after core

Detection of IMBHs from microlensing in globular clusters

Rates of collapse and evaporation of globular clusters

OF the known galactic globular clusters, ∼ 140 in number, about one-fifth have undergone core collapse, and an unknown number have evaporated altogether. From observational estimates of the dynamical

Kinematic fingerprint of core-collapsed globular clusters

Dynamical evolution drives globular clusters toward core collapse, which strongly shapes their internal properties. Diagnostics of core collapse have so far been based on photometry only, namely on

Blue Straggler Stars in the Inner Region of the Globular Cluster M 15

M15 (NGC 7078) is the prototype of core collapse globular clusters (Djorgovski & King 1986) with a resolved core of 2.2″ = 0.13 pc radius (Lauer et al. 1991) The short relaxation time in the core
...