【2004 Archives】

Near the center of the Milky Wayare enormous filaments of radio energy that sometimes look like bones004 Archives and one in particular has astronomers playing orthopaedists. 

If the new picture at the top of this story reminds you of an X-ray, well, that's because it is. Scientists used a spacetelescope to examine a conspicuous fracture along the bone's 230 light-yearlength. The images from NASA's Chandra X-ray Observatory, coupled with data from the MeerKAT radio telescope in South Africa and the National Science Foundation's Very Large Array, have revealed what likely caused it to crack. 

The assailant, seen right at the point of the break, could be a fast-spinning neutron star, known as a pulsar. Scientists think that, as the object whizzed through the galaxy at breakneck speed, it slammed through the bone and just kept on going. The collision apparently distorted the bone's magnetic field and warped its radio signal.

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SEE ALSO: Scientists discover a rebellious star family defying the cosmic order NASA's Chandra X-ray Observatory helped scientists study The Snake, a filament of radio energy near the Milky Way's galactic center. Credit: NASA / CXC / J. Vaughan illustration

The discovery not only offers a diagnosis for how the filament fractured but highlights that a single star can rattle the galaxy, even long after its own death. The findingsdescribed by NASA this week were published in Monthly Notices of the Royal Astronomical Society.

Researchers have named the filament G359-dot-something-something-something, but friends and fun astronomers just call it "The Snake." Why, you might ask? Because G359.13142-0.20005 just doesn't roll off the tongue. 

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The glowing streak threads through the congested downtown of the Milky Way. Dozens of other such filamentsappear in radio waves around the galactic center, lit up by particles spiraling through parallel magnetic fields. The Snake is one of the longest and brightest of its kind.

But why these structures exist — and what makes some longer and more luminous than others — remains a mystery. 

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An annotated version of a composite image of The Snake shows a close-up view of the fracture and the object that likely created it. Credit: NASA / CXC / Northwestern University / F. Yusef-Zadeh et al / NRF / SARAO / MeerKat / SAO / N. Wolk

As for the assailant, it's trying to make a quick getaway. Neutron stars form when massive stars explode into supernovas, leaving behind a crushed stellar core, perhaps just 10 miles wide. But a pulsarbeams radiation as it revolves like a lighthouse beacon. 

The new images also suggest extra X-rays may be coming from the area around the pulsar. Particles like electrons and positrons — tiny pieces of matter and antimatter — that sped up during the crash may have caused them. 

After a supernova, remnant neutron stars often get an intense kickback from the blast. Scientists estimate this pulsar could be flying at a dizzying 1 million to 2 million mph. 

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