Neutron star - Wikipedia
A neutron star is the collapsed core of a massive supergiant star. It results from the supernova explosion of a massive star —combined with gravitational collapse —that compresses the core past white dwarf star density to that of atomic nuclei.
Stellar nucleosynthesis - Wikipedia
In astrophysics, stellar nucleosynthesis is the creation of chemical elements by nuclear fusion reactions within stars. Stellar nucleosynthesis has occurred since the original creation of hydrogen, helium and lithium during the Big Bang. As a predictive theory, it yields accurate estimates of the observed abundances of the elements.
Gravitational-wave and X-ray probes of the neutron star ... - Nature
2022年2月8日 · The physics of neutron stars is a remarkable combination of Einstein’s theory of general relativity and nuclear physics. Their interiors harbour extreme matter that cannot be probed in the...
Neutron star | Definition, Size, Density, Temperature, & Facts
2024年11月8日 · Neutron star, any of a class of extremely dense, compact stars thought to be composed primarily of neutrons. Neutron stars are typically about 20 km (12 miles) in diameter. Their masses range between 1.18 and 1.97 times that …
List of neutron stars - Wikipedia
Neutron stars are the collapsed cores of supergiant stars. [1] They are created as a result of supernovas and gravitational collapse, [2] and are the second smallest and densest class of stellar objects. [3] In the cores of these stars, protons and electrons combine to form neutrons. [2]
Nuclear star clusters | The Astronomy and Astrophysics Review
2020年7月6日 · We review the current knowledge about nuclear star clusters (NSCs), the spectacularly dense and massive assemblies of stars found at the centers of most galaxies. Recent observational and theoretical works suggest that many NSC properties, including their masses, densities, and stellar populations, vary with the properties of their host galaxies.
Star Types - Science@NASA
A neutron star forms when a main sequence star with between about eight and 20 times the Sun’s mass runs out of hydrogen in its core. (Heavier stars produce stellar-mass black holes.) The star starts fusing helium to carbon, like lower-mass stars.
The Physics of Neutron Stars | Science - AAAS
Neutron stars are some of the densest manifestations of massive objects in the universe. They are ideal astrophysical laboratories for testing theories of dense matter physics and provide connections among nuclear physics, particle physics, and astrophysics.
Neutron Stars: Why study them? What makes them so fascinating?
2024年6月30日 · The interior of neutron stars has the density of an atomic nucleus, some 14 orders of magnitude larger than typical materials on Earth. Such high nuclear densities cannot be reached in a lab on...
The force is strong in neutron stars - MIT News
2020年2月26日 · With their new study, the researchers have found evidence that when particles are packed in much denser configurations and separated by shorter distances, the strong nuclear force creates a repulsive force between neutrons that, at a neutron star’s core, helps keep the star from collapsing in on itself.