Glitch (pulsar)

A glitch (from Yiddish "gletshn" - slide, slide, slide away) is an effect that occurs especially in young pulsars when the speed of rotation suddenly changes. During a glitch, the rotation speed increases for less than 30 seconds and then returns to the old value for several or hundreds of days.

It is believed that glitches are triggered by a neutron superfluid in the inner crust, which then transfers the angular momentum to the outer crust. The higher speed of the superfluid is due to the fact that the crust loses speed over time compared to the superfluids. The superfluid can therefore store an angular moment and release it back to the crust from time to time, which can then be observed by the earth as a glitch.

Web links

Dirk Eidemüller: Egging neutron stars: When the pulsar throws down - spectrum of science. Pulsars rotate precisely and faster than a helicopter rotor. But every now and then there is a "glitch". The dropouts allow a look inside the exotic objects. In: Spektrum.de. October 15, 2015, accessed October 16, 2015 .

Individual evidence

^ Wynn CG Ho, Cristóbal M. Espinoza, Danai Antonopoulou, Nils Andersson1: Pinning down the superfluid and measuring masses using pulsar glitches . In: Science Advances . tape 1 , no. 9 , October 3, 2015, doi : 10.1126 / sciadv.1500578 .

[Ho15-1] Wynn CG Ho, Cristóbal M. Espinoza, Danai Antonopoulou, Nils Andersson1: Pinning down the superfluid and measuring masses using pulsar glitches . In: Science Advances . tape 1 , no. 9 , October 3, 2015, doi : 10.1126 / sciadv.1500578 .