Globular Star Clusters are Constantly Kicking Stars out of the Galaxy - by EvanGough2
Their cores are densely packed with stars, and the dense environment can lead to powerful gravitational interactions. Those interactions can propel individual stars to extremely high velocities. Their high velocities can break the MW’s gravitational hold on them, and they can escape into intergalactic space.
Most stars are born in embedded clusters. Eventually, these clusters dissipate, and the stars, like our Sun, orbit around the center of the galaxy, bound by the Milky Way’s powerful gravity. Other stars are parts of either open clusters or globular clusters. When a star escapes from its cluster, astronomers call it a runaway star.
densities, but the DES might be exceptionally amplified due to the presence of BH subsystems in the centers of GCs,” the authors write. Here they’re alluding to the fact that astronomers have found stellar-mass black holes in some GCs.
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