Physics and Astronomy Colloquium
Black holes in globular clusters
Presented by Tom Maccarone, Texas Tech
For many decades, it had been thought that stellar dynamical processes would lead to the ejection of black holes from globular star clusters, the largest and densest star clusters in the Universe. X-ray observations of these clusters in other galaxies, and radio observations of clusters in our own Milky Way Galaxy have shown strong evidence for black holes in many clusters, which can be detected through their accretion disk, take matter from close binary companions, and convert some of the gravitational energy from that matter falling into the black holes into radiation and into power that goes into relativistic outflows. Furthermore, in several cases, the binary companions appear to be white dwarfs. I will discuss the discoveries of these objects and their implications for gravitational wave sources.
3:30 pm, Friday, October 29, 2021
PAIS-1100, PAIS
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