Black Hole "Graveyard" Found in a Globular Cluster

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A sub-cluster "graveyard" of black holes was detected by astronomers in a core-collapsed globular star cluster. Scientists were expecting to find an intermediate-mass black hole at the heart of the core-collapsed globular cluster NGC 6397, but instead they found evidence of a concentration of smaller black holes lurking there. New data from the NASA/ESA Hubble Space Telescope and ESA's Gaia satellite have led to the first measurement of the extent of a collection of black holes in a core-collapsed globular cluster.

00:00 Intro
01:47 Magellan TV
02:44 Searching for Intermediate mass black holes in globular clusters
03:34 How stars move in globular clusters and mass segregation
04:10 How intermediate mass black holes form in core-collapsed globular clusters
05:05 How to detect black holes
05:50 Previous studies of NGC 6397
07:30 Hubble and Gaia observations of NGC 6397
09:38 The fate of an extended core of black holes
10:58 Future work with Gaia
11:38 Gravitational Waves from merging black holes
11:54 Thanks to my Patrons!

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🧭 References:
Vitral and Mamon 2021: https://doi.org/10.1051/0004-6361/202039650
H. Baumgardt 2017: https://academic.oup.com/mnras/article/464/2/2174/2404627
Kaman et al 2016: https://doi.org/10.1051/0004-6361/201527065

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Видео Black Hole "Graveyard" Found in a Globular Cluster канала Launch Pad Astronomy