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This is not a comet - this is a pulsar

Astronomers have used X-ray imaging to conduct the most detailed study yet of the behavior of high-energy particles around a fast-moving pulsar.

Astronomers have used X-ray imaging to conduct the most detailed study yet of the behavior of high-energy particles around a fast-moving pulsar.
The image taken by the Chandra X-ray Observatory shows a shock wave created as the pulsar moves at supersonic speed through interstellar space. The result will provide deep insight into theories regarding the production of strong winds of matter and antimatter by pulsars.

In Chandra's photo, the bright cloud, known as the "mouse", is a strip of high-energy particles, about 4 light-years long, formed and flared as a result of the interaction between the pulsar and the interstellar gas. The compressed source at the top of this body is the pulsar whose speed of movement in space is estimated at almost 2 million kilometers per hour.

A cone-shaped cloud of particles emitting radio waves surrounds the X-ray column. The Mouse, or by its scientific name G359.23-0.82 was discovered in 1987 by radio astronomers using the National Science Foundation's Very Large Array in New Mexico. It got its name from its appearance in radio waves that showed a compact nose with a long tail, and a bulbous body, reaching a length of 55 light years.
"Astronomers are only aware of a few dozen pulsar wind nebulae, including the famous Cancer Nebula, but none of these nebulae have the combination that a mouse has of relatively young age and very fast movement in interstellar space." says Brian Gaensler of the Harvard-Smithsonian Center for Astrophysics and principal investigator in an article about the mouse that will appear in an upcoming issue of the Astrophysical Journal. "We are actually seeing a cosmic sonic wind tunnel, where we can study the effects of the pulsar's motion on the pulsar wind nebula, and test the existing theories.

Pulsars are also known for their rapid rotation, they are actually highly magnetized neutron stars - objects so compressed that a mass equal to the mass of the Sun is compressed into a sphere with a diameter of about 18 km. Their formation is associated with a type 2 supernova caused by the collapse of successive explosions of a massive star. The source of the pulsar's high speed is unknown, but many astrophysicists suspect that it is directly related to the circumstances of the explosions that were involved in the birth of the pulsar.
The rapid rotation and strong magnetic field of the pulsar can produce a wind of high-energy matter and antimatter that will be ejected at near the speed of light. These pulsar winds create magnetized bubbles of high-energy particles called the pulsar wind nebula. The X-ray data from the mouse allowed Ginsler and his colleagues to confirm the properties of the ambient gas, estimate the speed of the pulsar and analyze the structure of the various shock waves created by the pulsar, the stream of particles emanating from the pulsar and the magnetic field in the nebula.

The article in Universe Today
Astrophysics connoisseur - the universe

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