Rates of collapse and evaporation of globular clusters
Article Abstract:
The Milky Way Galaxy's original number of globular clusters has probably been diminishing through processes involving core-collapse and evaporation. Statistical analysis of observational data concerning relaxation times indicates a core collapse rate of two plus or minus one per gigayear (Gyr) and an evaporation rate of five plus or minus three per Gyr. The surviving clusters' brightness profiles bear out these rate estimates.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1992
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Faint X-ray sources in the core of the globular cluster M28
Article Abstract:
Globular clusters contain bright and faint X-ray sources and millisecond pulsars. Observations of the globular cluster M28 revealed two faint X-ray sources, and extended source and a point source. It is thought that the extended source could be a collection of low-luminosity accreting neutron-star binaries, or a synchrotron nebula.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1997
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