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New Views of Neutron Stars

Physics TodayPublished 1 February 1999
Lars Bildsten, Tod E. Strohmayer
Citations22
SJR quartileQ2
SJR score0.48
SNIP0.62

Abstract

Born amid the violence of supernova explosions, neutron stars are the extremely dense endpoints of stars that initially had a mass of more than about 18–10 M⊙ (M⊙ is the mass of the Sun, about 2×1033 g). During its final collapse, such a star expels most of its material, leaving behind a remnant—a neutron star—packing a typical mass of 1.4 M⊙ into a radius of only 10 km. With a density comparable to that of an atomic nucleus, a neutron star provides an extreme environment for fast and violent phenomena: Matter orbiting a neutron star can have a period as short as a millisecond; when it crashes into the star (that is, when it is “accreted”), this matter can be moving at one-third the speed of light. Because their behavior can vary over readily observable time scales, neutron stars can be rich sources of information about nuclear physics, general relativity and astrophysics.

Keywords

Physics and Astronomy