[우주][정리중][modifying]Neutron Stars(중성자성)

Neutron Stars(중성자성)

A neutron star is about 20km in diameter and has the mass of about 1.4 times that of our Sun. Neutron star is so dense that one teaspoonful would weight a billion tons. Neutron stars are one of the possible ends for a star. They result from massive stars which have mass greater than 4 to 8 times that of our Sun. After these stars have finished burning their nuclear fuel, they undergo a supernova explosion. The explosion blows off the outer layers and central region of the star collapses under gravity. It collapses so much that protons and electrons combine to form neutrons. Hence the name “neutron star”

           Simply pulsars are rotating neutron stars. They pulse because they rotate.

Spin-powered pulsars	Source of energy is the rotation of the neutron star
Accretion-powered pulsars	Neutron star and a normal star form the binary system. (accretion-부착물)

       

    Crab Nebular – An undisputed(반박의 여지가 없는, 모두가 인정하는) example of a neutron star formed during a supernova explosion.

White Dwarf	Masses much less than 8 solar masses the star
Neutron Star	8 to 20~30 times the mass of our sun
Black Hole	Initial masses a lot higher than 20~30 solar masses