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Famous Neutron Star, which is currently being glitched in a tremendous way



A composite image from observations of the cancer pulsar
Image: Roentgen: NASA / CXC / SAO; Optical: NASA / STScI; Infrared: NASA-JPL-Caltech

On November 8, 2017, a spinning neutron star "glittered" in one of the most studied objects in the sky more than ever before.

Back in 1054, Chinese astronomers discovered something that looked like a new star that soon dimmed. They had actually seen a supernova: a star that exploded, expelled gas and dust, and perhaps collapsed. Today, the supernova is left with only one cloud in the constellation Taurus, with a central, fast-rotating neutron star called a pulsar. Pulsars are extreme objects that are about the mass of our sun, but only a few miles wide. They typically rotate at a constant rate and emit a beam of radiation that appears to us like the regular illumination of a lighthouse. Recently, this pulsar has swallowed.

Given that the cancer pulsar is really the remnant of the 1054 supernova, it's pretty young, astronomical. Younger pulsars can cause interference, which means they suddenly turn faster before relaxing to their original rotational speed.

The 42-foot telescope of the Jodrell Bank Observatory is dedicated to the observation of the cancer pulsar.
There are many things that astronomers can learn from these disorders. "The physics of neutron stars represents huge extremes, not just density, but also gravity and magnetic field," said astrophysicist Victoria Kaspi of McGill University, who was not involved in the new study of the pulsar, to Gizmodo. "Glitches may be a rare probe for the interior of these incredible objects."

Scientists at the Jodrell Bank Observatory in the United Kingdom have been observing the cancer pulsar daily since 1984. The star typically revolves at a speed of 30 revolutions per second, and has since had 24 times fewer glitches. These were increases of around one millionth of a revolution more per second.

This glitch, an increase of around 15 millionths of a revolution per second, was the largest of the cancer pulsars, according to paper published on the arXiv Physics Preprint Server. This was surprising because scientists have long believed that the cancer pulsar, in contrast to other pulsars, such as the Vela pulsar, experiencing the greater disturbances, suffered only small glitches.

The Crab Nebula with Pulsar in it.
Image: X-ray: NASA / CXC / SAO / F.Seward; Optical: NASA / ESA / ASU / J.Hester & A.Loll; Infrared: NASA / JPL-Caltech / Univ. Minn./R.Gehrz

It's still unknown what causes these errors, the scientist Benjamin Shaw said in a Twitter thread . Some people think that an impulse could be exchanged between the interior of the star and its crust, slowing down the liquid interior and accelerating the crust, but that is not the only option.

It is believed that some extreme perturbations are related to the magnetic fields of these stars, and perturbations may be associated with changes in X-ray energy or even an explosion, Kaspi said. But despite its extremity, this latest glitch from the cancer pulsar did not cause any noticeable change in the energy delivered by the pulsar.

Scientists will continue to observe the cancer pulsar and observe how it returns to normal after the glitch. Since it is a neutron star, turning off and then turning it on will not prevent further interference.

[arXiv]


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