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Neutron Stars

A neutron star is the remains of a massive star that exploded. It is one of the densest objects known in the universe.

196 Questions

What evidence can you cite that pulsars are neutron stars?

A pulsar is a neutron star that rotates and sends a beam of electromagnetic radiation. This is known because only a very dense source of such radiation would be capable of rotating that quickly without disintegrating.

How are white dwarfs neutron Stars and black holes alike?

No. White dwarfs, neutron stars, and black holes are three different things. With the exception of some black holes, all are remnants of the cores of dead stars at various degrees of collapse.

A white dwarf is the remains of a low to medium mass star consisting of atomic nuclei surrounded by electrons from electron shells that were crushed by gravity. White dwarfs can be up to about two times the mass of the sun and are a few thousand miles across, some about the same size as Earth.

A neutron star is a remnant of a massive star that has collapsed even further. In a neutron star the atoms have been crushed so that neutrons are most of what remains. Neutron stars range from 2 to 3 times the mass of the sun and are roughly 12 to 25 miles across.

A black hole is the remains of a very massive star that has completely collapsed into, at least theoretically, an infinitely dense point. Around the black hole is an area where gravity is so strong that nothing can escape, not even light. Stellar mas black holes range from 3 to 30 times the mass of the sun. There are also supermassive black holes, which are millions to billions times the mass of the sun. It is not known how supermassive black holes form.

What is the process that creates a neutron star?

the only reason a star stays 'alive' is because it creates enough outward force from nuclear fusion to fight off the force of gravity. when a star runs out of fuel, the main and first option being hydrogen, the easiest to use, to create power, it has two options. the star has to try to fuse helium which is a lot harder to do, and requires a lot more heat to do, then beryllium and so on up to carbon which a star cannot fuse. then, when the star runs out of fuel that it can burn, gravity pushes all of the solar mass to the core. this is how a supernova is started. if the core manages to handle the pressure, it turns into a white dwarf star, if the core collapses, then it turns into a spacial anomaly known as a black hole. the outcome is a result of the amount of solar mass.

What is the weight of a penny on a neutron star?

Two cubic meters of neutron star would have a mass of about 10^18 (1 quintillion) kilograms or about 1 quadrillion metric tons.

How hot is a neutron star?

According to the Wikipedia, a newly formed neutron star would have a temperature of 1011 - 1012 Kelvin, but after a year, it will cool down to 106 (a million) Kelvin, due to the large number of neutrinos it emits.

How do astronimers determine the composition of a star?

The chemical composition of stars is determined by the emission lines present in the light from stars. The emission lines are characteristic of a given element. However, because of the Doppler effect and the numerous emission lines of some elements, this technique can be more difficult in practice than it appears.

What would happen if your sun was replaced by a pulsar?

We would all be killed in the supernova explosion that created the pulsar out of our Sun. The Earth itself would be vaporized. Any returning space travelers would be fried by the intense pulses of gamma radiation that give the "pulsar" or "pulsing gamma ray source" its name.

However, this cannot happen - because our Sun isn't nearly massive enough to go supernova.

Why is the Moon only visable at night?

The moon is visible during the day but it is most visible at night and early morning, but it is somtimes visible throughout the day.

How hot is a white flame?

Oh, as far as I know, white fire is the hottest, so that leaves it in 1st place, blue 2nd, and orange in 3rd. And orange fire is the coldest you'll ever find!

What do neutron stars emit?

If a neutron star's rotational period is fast enough to produce jets (A pulsar), said jets will emit radio waves, with faster periods emitting higher frequency radiation as well as the jets themselves emitting synchrotron radiation. Also, unless the neutron star were 0K, it will emit thermal radiation

However, as far as a neutron star that isn't a pulsar, nobody knows if they emit anything but thermal radiation.

How strong is magnetar?

Well magnetar is a star with a Strong magnetic field so i say it could pretty much pull something off Earth if it came close from One quadrillion miles (1,000,000,000,000,000 miles) away.

Compare similarities between white dwarfs and neutron stars?

A nova is created when additional material is accreted onto the hot surface of a white dwarf.

If sufficient material is accreted that pushes the mass of the white dwarf over the Chandrasekhar limit of about 1.38 solar masses a type Ia supernova will occur.

See related questions.

What determines whether a very massive star will become a neutron?

Whether a star will become a neutron star is determined by its mass. Generally, stars that are more than 8 solar masses (have a mass that is more than 8 times that of our Sun), but are less than 15 solar masses will become neutron stars when they die.

What are the most rapidly rotating neutron stars?

The fastest spinning neutron star that we've found so far is XTE J1739-285, which spins 1122 times every second. It was found by NASA's Rossi X-Ray Timing Explorer (RXTE) satellite. The most rapidly spinning pulsar, however, remains PSR J1748 2446ad, which spins 716 times a second. This pulsar was found by a team at Montreal's McGill University.

What is the structure of a neutron star?

A neutron star is composed almost entirely of neutrons.

They are supported against further collapse by quantum degeneracy pressure due to the Pauli exclusion principle. This principle states "that no two neutrons (or any other fermionic particles) can occupy the same place and quantum state simultaneously."

1988 Toyota pickup what gives off the injector pulse?

What gives off, the injector pluse? Do you mean, where do the pluse signals, that trigger the injectors, come from? The EMC (engine managment computer) usually handles this, after receiving bizillions of sensor readings, from every related sensor, involved in the process.

What kind of telescope do you need to most easily see a neutron star?

To most easily observe a neutron star, a powerful telescope with capabilities for high-energy astrophysics is required, such as a radio telescope or an X-ray observatory. Neutron stars emit primarily in the X-ray and radio wavelengths, so instruments like the Chandra X-ray Observatory or the Very Large Array (VLA) for radio astronomy would be ideal. Optical telescopes are generally not effective for observing neutron stars directly due to their faintness in visible light.

What does a neutron star consist of?

A neutron star is primarily composed of densely packed neutrons, which are subatomic particles that carry no electric charge. Formed from the remnants of a supernova explosion, these stars have an incredibly high density, with a mass greater than that of the Sun compressed into a sphere roughly 20 kilometers in diameter. The intense gravitational forces in a neutron star prevent the neutrons from decaying, resulting in a unique state of matter known as "neutron-degenerate matter." Additionally, a neutron star may have a thin outer crust of atomic nuclei and electrons.

What do Neutron stars create?

Neutron stars are incredibly dense remnants of massive stars that have undergone supernova explosions. They primarily create strong gravitational and magnetic fields, which can lead to the emission of intense radiation, particularly in the form of X-rays and gamma rays. Additionally, neutron stars are considered potential sources of gravitational waves, especially when they merge with other neutron stars or black holes. Their exotic conditions also provide insights into fundamental physics, including the behavior of matter at extreme densities.

Why are neutron stars so heavy?

Neutron stars are so heavy because they are the compact core of a star that is 8 time the mass of our Sun. The most massive neutron stars possible are 3 times the mass of our Sun.

A spinning neutron star is also called what?

A radio pulsar or a rotation-powered pulsar. A link is provided for more information.