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In addition to pulsars, non-pulsating neutron stars have also been identified, although they may have minor periodic variation in luminosity. [63] [64] This seems to be a characteristic of the X-ray sources known as Central Compact Objects in supernova remnants (CCOs in SNRs), which are thought to be young, radio-quiet isolated neutron stars. [63]
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] Neutron stars can be classified as pulsars if they are ...
Name Mass (M ☉) Distance ()Companion class Mass determination method Notes Refs. PSR J1748-2021B: 2.548 +0.047 −0.078: 27,700: D: Rate of advance of periastron.: In globular cluster NGC 6440.
With Supernova 1987A, the star's size and the neutrino burst's duration had suggested the remnant would be a neutron star, but this had not been confirmed through direct evidence.
Astronomers have found evidence that a neutron star exists at the centre of the only exploding star – supernova – visible to the naked eye in the last 400 years, solving a 30-year-old mystery.
The main trait that sets magnetars apart from other neutron stars is a magnetic field 1,000 to 10,000 times stronger than an ordinary neutron star's magnetism and a trillion times that of the sun.
A classification system for neutron stars using Roman numerals has been proposed: type I for less massive neutron stars with low cooling rates, type II for more massive neutron stars with higher cooling rates, and a proposed type III for more massive neutron stars (possible exotic star candidates) with higher cooling rates. [127]
The most massive type of degenerate star is the neutron star. See Most massive neutron star for this recordholder. [NB 4] Most massive neutron star PSR J0740+6620: 2019 2.14 M Sun: Several candidates exist which have a higher mass, however their mass has been measured by less precise methods and as such their mass value is regarded as less ...