FAST radiotelescope

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Witness
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FAST radiotelescope

Post by Witness » Wed Oct 11, 2017 3:18 am

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While Arecibo recovers:
GB Times wrote:China's huge new FAST radio telescope discovers two new pulsars

Chinese scientists working on the 500m FAST telescope have announced the discovery of two new pulsars, marking the first confirmed finds from the world's largest radio telescope.

The new pulsars PSR J1859-01 and PSR J1931-02, also referred to as FAST pulsar #1 and #2 (FP1 and FP2), were detected on August 22 and 25, and were confirmed by the Parkes telescope in Australia on September 10.

“FP1 is a pulsar with a spin period of 1.83 second and an estimated distance of 16 thousand light-years, and FP2, is a pulsar with a spin period of 0.59 second and an estimated distance of 4,100 light years,” said Li Di, Deputy Chief Engineer of FAST Project at the National Astronomical Observatories (NAOC), on Tuesday.

Pulsars, which are rapidly rotating remnants of formerly massive stars, are sometimes referred to as 'lighthouses' of the universe due to their regular rotational periods and focused electromagnetic radiation emissions.

Director of NAOC Yan Jun told press that, "The two new discovered pulsars symbolize the dawn of a new era of systematic discoveries by Chinese radio telescopes".

FAST, which stands for Five-hundred-meter Aperture Spherical radio Telescope, is the world's largest single aperture radio telescope. It is located in Guizhou Province and operated by NAOC, under the Chinese Academy of Sciences (CAS).
https://gbtimes.com/chinas-huge-new-fas ... ew-pulsars

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Anaxagoras
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Re: FAST radiotelescope

Post by Anaxagoras » Wed Oct 11, 2017 10:26 am

Well, good for the Chinese. I think over 2000 pulsars at least have already been discovered, but hopefully they will find something truly interesting eventually. At least it means they telescope works I guess.
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Rob Lister
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Re: FAST radiotelescope

Post by Rob Lister » Wed Oct 11, 2017 10:56 am

It is very cool. For the full technical review
https://arxiv.org/ftp/arxiv/papers/1105/1105.3794.pdf

The way they aim it is also very cool
Image

So the section of the dish that is actually used is about the same as the size of Arecibo, but the section of the dish that Arecibo actually uses is a much smaller fraction, and Arecibo is not nearly as steerable.