FAST's first discovery of a millisecond pulsar

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FAST's first discovery of a millisecond pulsar

Post by Dragon on Tue May 01, 2018 4:18 pm

China's 500-meter Aperture Spherical radio Telescope (FAST) discovered a radio millisecond pulsar (MSP) coincident with the unassociated gamma-ray source 3FGL J0318.1+0252 in the Fermi Large Area Telescope (LAT) point-source list. This is another milestone of FAST.

FAST, world's largest single-dish radio telescope, operated by the National Astronomical Observatory of the Chinese Academy of Sciences, has discovered more than 20 new pulsars so far. This first MSP discovery was made by FAST on Feb. 27 and later confirmed by the Fermi-LAT team in reprocessing of Fermi data on April 18th.

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Re: FAST's first discovery of a millisecond pulsar

Post by Dragon on Tue May 01, 2018 4:19 pm


Credit: Pei Wang/NAOC

The Gamma-ray sky map and integrated pulse profiles of the new MSP: Upper panel shows the region of the gamma-ray sky where the new MSP is located. Lower panel a) shows the observed radio pulses in a one-hour tracking observation of FAST. Lower panel b) shows the folded pulses from more than nine years of Fermi-LAT gamma-ray data.

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Re: FAST's first discovery of a millisecond pulsar

Post by Dragon on Tue May 01, 2018 4:21 pm



This video simulation shows the two pulsars orbiting around the common center of mass. The faster rotating pulsar spins almost 3000 times a minute while the slower rotating pulsar spins only 22 times a minute. The two pulsars orbit each other once every 2.4 hours.

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Re: FAST's first discovery of a millisecond pulsar

Post by Dragon on Tue May 01, 2018 4:22 pm



In three years, NASA's Fermi has detected more than 100 gamma-ray pulsars, but something new has appeared. Among a type of pulsar with ages typically numbering a billion years or more, Fermi has found one that appears to have been born only millions of years ago.

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Re: FAST's first discovery of a millisecond pulsar

Post by Dragon on Tue May 01, 2018 4:22 pm



Just 12 miles across, a collapsed star 1000 light years from Earth spins more than 11 times each second.

The Vela pulsar belches charged particles at 70% of light-speed, seen here in this 8-frame movie from the space-based Chandra X-ray Observatory.

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