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Most stars spin (albeit is very slowly), but when the star starts to shrink it will speed up due to conservation of angular momentum. Moreover because a neutron star is so very heavy it takes a long time for it to slow down (breaking can occur via magnetic fields for example).

You can test this principle yourself by sitting into an office chair, spreading your arms, and have someone give you a good whirl. You will find that while spinning you will spin faster if you pull your arms inwards and slower if you put them out again.

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โˆ™ 2011-04-22 15:08:39
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Q: Why do neutron star spin so rapidly?
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Why is a neutron star expected to spin rapidly?

Because of the angular momentum when it is formed causes it to spin so rapidly.


Why don't all supernova remnants contain pulsars?

A "pulsar" is a rapidly-rotating neutron star, with a core of collapsed matter. The pulsar rotates because the original star rotated. If\\ WHEN a massive star becomes a supernova, the force of the explosion will crush the core of the star into either a neutron star or a black hole, if the original star was massive enough. The angular momentum (the "spin energy") of the original star doesn't disappear; like a figure skater pulling in her arms to spin faster, the neutron star will spin more rapidly because it has collapsed in size. If the neutron star's axis is pointed somewhere close to Earth, we detect the pulsating x-rays and we call it a "pulsar". So to answer the question, all supernova remnants contain either neutron stars or black holes, but they are pulsars only if they spin rapidly.


What would happen to a neutron star with an accretion disk orbiting in a direction opposite to the neutron star's spin?

The neutron star so affected wouldn't really notice. The mass of the neutron star is huge compared to that of the material in the accretion disk. And that matter, when it falls in, wouldn't really "slow" the spin of the star much unless there was a gigantic quantity of matter falling in and/or it acted over a very long period.


Pulsars cannot be spinning white dwarfs because?

A white dwarf doesn't have enough angular momentum when it is formed to spin so rapidly.Also a pulsar is a neutron star, not a white dwarf.See related questions.


How do neutron stars differ from other giant stars?

A neutron star is the "end of the line" for a giant star that exploded as a supernova. The material in a neutron star is packed so densely that a chunk of it the size of a cigarette package would weigh thousands of tons. It spins rapidly, at a steady rate (they are sometimes called "radio beacon stars").


What makes a pulsar pulsate?

A neutron star is unimaginably dense. It contains the mass of the Sun, but has that mass squeezed into a ball perhaps 20km (12 1/2 miles) across. Further, neutron stars are so small that they can spin very rapidly, many times per second or faster. When they spin they emit electromagnetic radiation which can appear as flashes from earth. If the magnetic pole of the neutron star is "pointed" [See related link - Pictorial of pulsar] towards Earth, they are called pulsars, as they "pulse" as they spin and can be detected. The flashes produced by the pulsars are detected as the electro magnetic radio waves caught up by the radio telescopes


What is the core of a star called if it is crushed in to a small but very dense object?

"Small but very dense" sounds like the description of a neutron star or "collapsed matter star". Theoretically, a black hole (the only thing more dense) has no physical size at all. So, "neutron star". If the neutron star is spinning rapidly, they are called "pulsars" for the radio-wave pulses that they generate.


Could a neutron star break due to a collision?

A neutron star is so dense, that apart from a direct collision from another neutron star, the chances are slim to impossible.


How did neutron stars get its name?

The name "neutron star" some from the fact that the neutron star is mainly composed of neutrons. The gravitational pull of a neutron star is so strong that most matter are crushed into neutrons.


Is a neutron star a young star or an old star?

neutron star is a stellar remnant so it is neither a young star nor an old star . It is formed by the gravitational collapse of massive star and are composed of neutrons . neutron star has a mass in between 1.35 to 2 solar masses


How does the size of a supernova affect how fast a neutron star spins?

There are several elements to be considered here. First is the mass of the original star, and secondly, its rotational speed. We know that our own Sun spins about once a month; 26 days per rotation in the middle latitudes, but 33 days per rotation nearer the poles. Thirdly, the law of conservation of angular momentum always applies. The rotational energy in the original star must equal the rotational energies of the resultant neutron star AND the mass blown away into space. (In the explosion of a supernova, only a fraction of the star is compressed into a neutron star or black hole; the majority if the star's mass is thrown into space, where it will eventually be recycled into new stars and planetary systems. This is where the heavy elements that form the Earth came from; old supernova remnants.) When mass is compressed, such as a star being crushed into a neutron star or black hole - or a spinning ice skater pulling her arms in closer to her body - the angular momentum ALWAYS remains the same. So with a shorter distance between the axis of rotation and the edge, the object must spin more rapidly. The more mass, the faster the spin. We know that some neutron stars are spinning quite rapidly, because of the radio pulses generated. We call these "pulsating neutron stars" or "pulsars" for short. Each one has its own unique spin, and they generally do not vary. In fact, the radio astronomers who first detected them called them "LGM signals", for "little green men". The astronomers could not imagine how a regular rapid radio pulsation could be generated naturally.


What is a good ratio example of an average neutron star to our sun?

A typical neutron star has a diameter of about 24km our Sun has a diameter of 1.392×106 km So our Sun is about 58,000 times bigger than a neutron star.


What would happen if a neutron star collided with earth?

It is extremely unlikely that a neutron star (or any star or planet) will collide with the Earth, so this is not something that you need to worry about, however, if a neutron star were to collide with the Earth, the Earth would be captured by the intense gravitational field of the neutron star, and would be absorbed by the star. Under sufficient pressure, electrons and protons will merge to form neutrons, and so the atomic matter of which the Earth is composed can be converted into pure neutrons.


Can Neutron stars turn back into a normal star and if so how?

No. The mass of a neutron star is so compact and the gravity so high that it could never again become a regular star. Besides, neutron stars come from the cores of stars that have already gone nova. All the hydrogen was already fused into heavier elements.


How is a supernova different from a neutron star?

A supernova explosion is the death of a massive star, which normally leaves behind either a neutron star or a black hole. So a supernova is like a campfire, while a neutron star is like the burnt-out log that's left when the fire goes out.


A pulsar is a rapidly rotating what?

A pulsar is a rapidly rotating neutron star. It produces flashing signals, either in the visible light spectrum, or the radio spectrum, or both. When radio pulsars were first discovered, the period of the signal was so precise, it was originally thought that they were radio signals from an alien source.


A rapidly rotating neutron star that emits beams of radiation along its magnetic axis is called a what?

It's called a pulsar. However - ALL young neutron stars emit the said beam. It's only if that beam is detectable on Earth is it called a pulsar. So a Neutron Star and a Pulsar are the same thing. See related questions. but then again they are different.


How do pulsars spin so fast?

Because of the conservation of rotational momentum. As a stars core collapses, it retains the original rotational velocity. As a pulsar or neutron star's original size was in the region of 60,000 time greater that it's current form, the rotational speed is multiplied by this factor. Maintaining the rotational momentum requires the star to spin faster.


Why do pulsars spin so fast?

Because of the conservation of rotational momentum. As a stars core collapses, it retains the original rotational velocity. As a pulsar or neutron star's original size was in the region of 60,000 time greater that it's current form, the rotational speed is multiplied by this factor. Maintaining the rotational momentum requires the star to spin faster.


What is spin of particle in physics?

Taking a 'particle' as a proton/ neutron, both of these have spin 1/2. So do all leptons (electrons, neutrinos, etc).


How is a white dwarf different from a neutron star?

a white dwarf is the blue-white hot core of a star that is left behind after its outer layers have expanded and drifted out into space. and a neutron star are the remains of high mass stars. so the diffrence between a white dwarf and a neutron star is that a white dwarf is just a piece of whats left and a neutron star are the pieces of high mass stars


Why do you not expect to find a 5 solar mass neutron star?

There are no neutron stars with 5 solar masses because one if a neutron star exceeds 3 solar masses, the neutrons inside would no longer be able to support the extreme gravity, so the neutron star would then collapse into a black hole.A neutron star is prevented from further collapse by a force call neutron degeneracy pressure. Above 3 solar masses gravity will overcome this force and the stellar remnant will collapse completely to form a black hole.


How is a neutron star different from a regular star?

A neutron star is the collapsed core of a massive star that destroyed itself in a supernova. It is so dense that even that atoms that made up the core have been crushed, leaving behind an interior made of neutrons.


How many neutron star diameters fit in the diameter of a dwarf star?

There are many types of Dwarf stars - all with different diameters. Our Sun is a dwarf star! A typical neutron star has a diameter of about 24km our Sun has a diameter of 1.392×106 km So our Sun is about 58,000 times bigger than a neutron star.


Does a neutron star contain electrons?

Neutron stars are made almost entirely of neutrons. These neutrons are formed when the star implodes, causing the orbiting electrons of the atoms to interact with the protons in the nucleus. So, it is safe to say that neutron stars contain no electron.