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Numerical simulations of globular clusters have demonstrated that binaries can hinder and even reverse the process of core collapse in globular clusters. When a star in a cluster has a gravitational encounter with a binary system, a possible result is that the binary becomes more tightly bound and kinetic energy is added to the solitary star.
The cluster contains around 400,000 stars, [8] and can be seen with the naked eye under good observing conditions. [10] NGC 6397 is one of at least 20 globular clusters of the Milky Way Galaxy that have undergone a core collapse, [8] meaning that the core has contracted to a very dense stellar agglomeration.
Messier 15 or M15 (also designated NGC 7078 and sometimes known as the Great Pegasus Cluster) is a globular cluster in the constellation Pegasus. It was discovered by Jean-Dominique Maraldi in 1746 and included in Charles Messier 's catalogue of comet -like objects in 1764.
Core collapse can refer to: The collapse of the stellar core of a massive star, such as the core collapse that produces a supernova; Core collapse (cluster), the dynamic process that leads to a concentration of stars at the core of a globular cluster
Messier 70 or M70, also known as NGC 6681, is a globular cluster of stars to be found in the south of Sagittarius. [a] It was discovered by Charles Messier in 1780. [b] [6] The famous comet Hale–Bopp was discovered near this cluster in 1995. [10] [c] It is about 29,400 [4] light years away from Earth and around 6,500 light-years [11] from the ...
NGC 6355 is a globular cluster located in the constellation Ophiuchus. [5] ... It is a core-collapse cluster. [3] See also. List of NGC objects (6001–7000)
This corresponds with a core region densely populated with stars around 1.3 light-years in diameter, which indicates it has undergone core collapse. The cluster lies around 13,000 light-years distant and is one of the closer globular clusters to Earth. It also lies 17,000 light-years away from the galactic centre. [8]
NGC 6522 is possibly the oldest star cluster in the Milky Way, [10] with an age of more than 12 billion years. [11] [12] It is a core collapsed cluster with a core radius of 0.5′ and a 1.0′ half-light radius. [9] The cluster formed four billion years before the Milky Way galactic bar appeared, and may have been confined to the bar for a ...