Whats left after all the radiation and energy has evaporated from a dead neutron star?

Answer 1

A dense, cold mass of neutrons.

Answer 2

Neutrons.

The energy and radiation (same thing, really...) are emitted by the neutron star as it cools.

It will never cool completely, however, as neutrons DO decay - half life of an isolated neutron is 11.5 minutes - but in a neutron star, something like 1 x 10^11 or ^12 YEARS.

As the cores spin in their magnetic fields, some neutron stars emit intense magnetic waves - these are called magnetars. They will emit energy until they stop spinning - in the next 10^9 years or so...

Hope this helps!

Answer 3

The nature of the evolution of a neutron star puts ample matter in it's vicinity so it will never die out.
The neutron star is the end stage of a massive star that went super nova.
It will accrete matter from it's surroundings until the degenerate neutron pressure that sustains it is over come and it collapses,when all the space,that separates the neutrons is displaced,the star reverts to a quantum state and explodes in an incredible burst of gamma rays and light that makes the original super nova look like a birthday candle.

Answer 4

How neutron star is born..the earth like core crunches into the size of a city full of neutrons, temperature about 100million degrees celcius. the squeezed core emit shock wave and neutrinoes escapes.slowly wat is left is a dense core of neutrons.

Answer 5

One very frigging big nucleus.

Answer 6

I think it turns to a black hole.