Starcorpses II: Neutron Stars and Pulsars

Neutron discovered in 1932
 

Obeys Pauli principle

Early Predictions of neutron stars

Type II supernovae

Explosion is not at center

Central part remains

 

Size ~ 20 km

(mass > ~ 1.4 M_sun) Density up to 10¹⁸ kg/_m3

 

 
 

1967: Jocelyn Bell: Regular radio pulses 1.33728 s apart

LGM hypothesis

Pulsars, periods 1ms - 10s

Crab Pulsar
   
 
 
 
 
What can vary so rapidly?

Masses:

Rotating neutron stars !

Rotate fast:

Localized radiation: Magnetic field

Like a lighthouse...

Closest NS	SNR & NS	X-ray Pulsar	Lone NS
In Puppis A	Heart of Crab	More ...	Crab Pulsar
Ultra-fast Pulsar	More ...

Explorations: Ch.14: Stellar Remnants: White Dwarfs, Neutron Stars and Black Holes (Sect. 2)