Anonymous
Anonymous asked in Science & MathematicsAstronomy & Space · 1 decade ago

Why are Neutron stars so incredibly dense and what causes them to spin so rapidly???

Also why do they eject beams of x-ray radiation from their poles,like a lighthouse,hitting our planet very so often...Thanks for the detail...Tom Science 4

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  • 1 decade ago
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    "...Why are Neutron stars so incredibly dense..."

    Start with a star that's at least 1.5 times more massive than our own sun and then let most of that huge mass almost instantaneously collapse onto the core of the star. The end result is an object suddenly about 10 miles in diameter with most of the original mass of the star contained within. That's incredible density!

    "...what causes them to spin so rapidly..."

    The same thing that causes ice skaters to spin faster when they draw in their arms close to their bodies. The original star would have had a diameter of around 1-million miles. It would also have had rotation. Now suddenly that 1-million mile diameter is only about 10 miles, but one of the physical laws says that momentum (..in this case axial rotation..) must be conserved. In effect the star (..spinning ice skater) has brought in its 'arms' from 1-million miles to only 10.

    "...why do they eject beams of x-ray radiation from their poles..."

    Many neutron stars are part of a binary pair, one being a regular star. As they orbit around each other, material is sucked off the regular star by the neutron star and accelerated to very high velocities by its immense gravity. Internal friction within this material raises it to temperatures high enough to generate xrays.

    "...a lighthouse,hitting our planet very so often..."

    This phenomenon only happens when the poles of a neutron star are pointed towards Earth. As the neutron star rotates (..about once per millisecond..) the xrays concentrated at its poles sweep past us. These particular neutron stars are also known as 'pulsars.'

    Source(s): Personal data base...
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  • 1 decade ago

    A neutron star spins so fast because as the core of the dying star collapses during a supernova, it spins faster and faster the smaller it gets. Similar to how a spinning figure ice skater spins faster as they bring their arms closer to their bodies. As for why they eject beams from their poles, I believe this is because neutron stars have gigantic magnetic fields (perhaps the most powerful in the universe) which take all the radiation they give off and emit it from only the poles.

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  • Anonymous
    1 decade ago

    The study of this type is exciting and endlessly interesting….The currently popular maximum neutron star mass is about 3-3.2 Solar masses. (However, being a scientific subject, there are some researchers who contest this limit on a few arguments.) Neutron stars are created when normal stars of 4-8 Solar masses undergo supernova explosions and throw off most of their outer material. The remaining protons and electrons collapse and are fused together to form a dense ball of neutrons. If you are truly interested in this, go to this Website below for more info on subject:

    http://imagine.gsfc.nasa.gov/docs/science/know_l1/...

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  • mandi
    Lv 4
    3 years ago

    Neutron stars spin straight away because they they're small in evaluation to their mass. really, maximum neutron stars aren't any higher than say.. new york.. inspite of the indisputable fact that, in case you've been to weigh merely one sewer's thimble complete of the densly packed neutrons comprising one in each of those stars it would want to weigh over one hundred million lots. I comprehend that sounds loopy, yet its spectacular. The clinical reason for the speedy rotation is conservation of skill and action. It really follows a similar principals as an ice skater. even as the skater pulls of their hands and stands tall, they spin speedier. even as they push their hands out, they decelerate. because the neutron in call for human being change into once very great (nevertheless keeps its mass, yet decreases in length) it starts to spin speedier and speedier. This compresses the neutrons even extra causing the significant weight I instructed you about in the previous.

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  • 1 decade ago

    Bill Bryson's book 'A Short History of Almost Everything' is a superb source of answers to this type of question; and it's written in a simple non-scientific way which is the books great appeal. I highly recommend it.

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