Neutron Stars

Neutron Stars

Neutron stars news, blogs, and links

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Written by CaseyKazan on
The pulsar, a.k.a. the "Black Widow," is moving through the galaxy at a speed of almost a million kilometers per hour. A bow shock wave due to this motion is visible to optical telescopes, shown in this image as the greenish crescent shape. The pressure behind the bow shock creates a second shock wave that sweeps the cloud of high-energy particles back from the pulsar to form the cocoon. This composite X-ray (red/white) and optical (green/blue) image reveals an elongated cloud, or cocoon, of high-energy particles flowing behind the rapidly rotating pulsar, B1957+20 (white point-like source). The pulsar is emitting intense high-energy radiation that ... Read Full Story
Written by toptourguide on
A star's spectacular death in the constellation Taurus was observed on Earth as the supernova of 1054 A.D. Now, almost a thousand years later, a super dense object -- called a neutron star -- left behind by the explosion is seen spewing out a blizzard of high-energy particles into the expanding debris field known as the Crab Nebula. X-ray data from Chandra provide significant clues to the workings of this mighty cosmic "generator," which is producing energy at the rate of 100,000 suns. This composite image uses data from three of NASA's Great Observatories. The Chandra X-ray image is shown in blue, the Hubble ... Read Full Story
Written by CaseyKazan on
Pulsar Power, the Next Big Thing: The European Space Agency’s Ariadna initiative is studying a totally awesome navigation system that creams the one you'll find in your new Porche: they are examining the feasibility of navigation relying on millisecond pulsars, rotating neutron stars that spin faster than 40 revolutions per second. The pulses of these dead stars can be used as exquisitely accurate timing mechanisms. Pulsars have huge advantages over a traditional deep space satellite network to fix a ship's position — it doesn’t scale and costs a fortune. Autonomous navigation is clearly preferable, tying the navigation system to natural objects like pulsars. Pulsars ... Read Full Story
Written by CaseyKazan on
Scientists have finally identified the mysterious source of X-ray emissions at the center of our galaxy’s youngest supernova: Inside the remains of Cassiopeia A sits a baby neutron star surrounded by a thin layer of carbon. Discovered in Chandra's "First Light" image obtained in 1999, the point-like X-ray source at the center of Cas A was presumed to be a neutron star, or pulsar, the typical remnant of an exploded star, but it surprisingly did not show any evidence for X-ray or radio pulsations. Pulsars rank at or near the top of freaky phenomena found in our Universe. In the early 1930s, California Institute ... Read Full Story
Written by switbd on
Evidence for a thin veil of carbon has been found on the neutron star in the Cassiopeia A supernova remnant. This discovery, made with NASA's Chandra X-ray Observatory, resolves a ten-year mystery surrounding this object. "The compact star at the center of this famous supernova remnant has been an enigma since its discovery," said Wynn Ho of the University of Southampton and lead author of a paper that appears in the November 5 issue of Nature. "Now we finally understand that it can be produced by a hot neutron star with a carbon atmosphere." By analyzing Chandra's X-ray spectrum -- akin to a fingerprint ... Read Full Story
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Image 2: New evidence from Chandra suggests that the neutron star at the center of the Cas A supernova remnant has an ultra-thin carbon atmosphere. This uniform carbon atmosphere would explain the lack of X-ray pulsations from this object because the neutron star would be unlikely to display any changes as it rotates. The absence of pulsations has been a mystery since the neutron star was discovered in Chandra's "First Light" image over a...  
From redorbit.com ()
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Scientists have finally identified the mysterious source of X-ray emissions at the center of our galaxy’s youngest supernova: Inside the remains of Cassiopeia A sits a baby neutron star surrounded by a thin layer of carbon dioxide. Twenty times heavier than our sun and 11,000 light years away from Earth, Cassiopeia A was a dense star [...]  
From blog.wired.com ()
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A Chandra X-ray Observatory image of the supernova remnant Cassiopeia A. Credit: NASA/CXC Supernova remnant Cassiopeia A (Cas A) has always been an enigma. While the explosion that created this supernova was obviously a powerful event, the visual brightness of the outburst that occurred over 300 years ago was much less than a normal supernova, [...]  
From universetoday.com ()
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Imagine an object with the mass of the Sun, crushed down to the size of Manhattan. Now set that object spinning hundreds of times a second, blasting out powerful beams of radiation like a lighthouse. That's a pulsar, one of the most exotic objects in the Universe. Click here to download the episode. Or subscribe to: astronomycast.com/podcast.xml [...]  
From universetoday.com ()
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Evidence for a thin veil of carbon has been found on the neutron star in the Cassiopeia A supernova remnant. This discovery, made with NASA's Chandra X-ray Observatory, resolves a ten-year mystery surrounding this object.  
From newswise.com ()
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