Millisecond Pulsars (MSP)

NEUTRON STARS

Neutron stars are formed when a massive star runs out of fuel and collapses. The very central region of the star – the core – collapses, crushing together every proton and electron into a neutron. If the core of the collapsing star is between about 1 and 3 solar masses, these newly-created neutrons can stop the collapse, leaving behind a neutron star. Note: Stars with higher masses will continue to collapse into stellar-mass black holes.

Since neutron stars began their existence as stars, they are found scattered throughout the galaxy in the same places where we find stars. And like stars, they can be found by themselves or in binary systems with a companion.

Neutron stars, are the densest bodies in the universe excluding black holes.

A handful of neutron stars have been found sitting at the centres of supernova remnants quietly emitting X-rays. More often, though, neutron stars are found spinning wildly with extreme magnetic fields as pulsars or magnetars. 

PULSARS

Pulsars are rotating neutron stars observed to have pulses of radiation at very regular intervals that typically range from milliseconds to seconds. Pulsars have very strong magnetic fields which funnel jets of particles out along the two magnetic poles. These accelerated particles produce very powerful beams of light.

 MAGNETARS

Another type of neutron star is called a magnetar. In a typical neutron star, the magnetic field is trillions of times that of the Earth's magnetic field; however, in a magnetar, the magnetic field is another 1000 times stronger.

PRACTICE QUESTION

Q. Consider the following statements.

a)    In a typical neutron star, the magnetic field is trillions of times that of the Earth's magnetic field.

b)    Millisecond Pulsars (MSP) are formed when a massive star collapses.

c)    Neutron stars, are the densest bodies in the universe.

d)    Neutron stars are often found spinning wildly with extreme magnetic fields as pulsars or magnetars.

Which of the statements given above are incorrect?

1. a and b only

2. b and d only

3. a, b and d only

4. All of the above.

Correct Answer: 3) a, b, and d only

Neutron stars, are the densest bodies in the universe excluding black holes.