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Its core has undergone a contraction known as "core collapse" and it has a central density cusp with an enormous number of stars surrounding what may be a central black hole. [12] Home to over 100,000 stars, [11] the cluster is notable for containing a large number of variable stars (112) and pulsars (8), including one double neutron star ...
The Leaning Tower of Dallas was the core of an 11-story building in Dallas, Texas that unexpectedly remained standing and slightly leaning after the demolition of the building it was part of. On February 16, 2020, Lloyd D. Nabors Demolition company dynamited the building to make way for a $2.5 billion mixed-use project.
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 .
A central massive object (CMO) is a high mass object or cluster of objects at the centre of a large star system, such as a galaxy or globular cluster.In the case of the former, the CMO may be a supermassive black hole, a nuclear star cluster, or even both together.
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
When the core's mass exceeds the Chandrasekhar limit of about 1.4 M ☉, degeneracy pressure can no longer support it, and catastrophic collapse ensues. [10] The outer part of the core reaches velocities of up to 70 000 km/s (23% of the speed of light) as it collapses toward the center of the star. [11]
If the center of the star is composed mostly of carbon and oxygen then such a gravitational collapse will ignite runaway fusion of the carbon and oxygen, resulting in a Type Ia supernova that entirely blows apart the star before the collapse can become irreversible. If the center is composed mostly of magnesium or heavier elements, the collapse ...
Diagram of van Putten (2009) showing the gravitational radiation produced in binary coalescence of neutron stars with another neutron star or black hole and, post-coalescence or following core-collapse of a massive star, the expected radiation by high-density turbulent matter around stellar mass Kerr black holes. As the ISCO (ellipse) relaxes ...