必客手机版官网平台: China's FAST discovers 201 pulsars

2021-05-20 Editor : Zhang Dongfang ECNS App Download
China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) (Photo/China News Service ) 本文来源:,根据欧洲央行周四在法兰克福发布的声明,管理委员会将从2017年4月份开始延长QE至12月,但每月规模从当前的800亿欧元调低至600亿欧元(650亿美元)。看起来微软似乎太沉迷于在广告中捆绑苹果,每一次Surface的广告都要与苹果设备一较高下。1877年,达尔文将这些发现和观察笔记整理并评论,写成一篇题为《婴儿事略》(Abiographicalsketchofaninfant)的论文,发表在《精神》(Mind)杂志上。快充作为一个目前Android的核心竞争力,越来越被用户看重,李楠也坦然称,魅族完全可以将充电速度做的更快,达到24W,但为了用户的安全还是将功率降到了18W,虽然速度有所下降,但充电速度仍然是苹果的1倍以上。



China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) (Photo/China News Service )

(ECNS) -- China's Five-hundred-meter Aperture Spherical Radio Telescope (FAST) has discovered 201 pulsars,including some faint ones, in the Galactic Plane Pulsar Snapshot (GPPS) survey, the National Astronomical Observatories of Chinese Academy of Sciences said on Thursday.

Discoveries of the research, led by Professor Han Jinlin of the National Astronomical Observatories, were published in Research in Astronomy and Astrophysics (RAA) on the same day.

The survey uncovered pulsars with extremely high dispersion measures (DMs), challenging the current widely used models for Galactic electron density distribution, said Han, adding that according to the snapshot observation mode, these pulsars are believed to be located outside the Milky Way.

However, "there are spiral arms in these directions of the galaxy, which have a large number of gas clouds of electrons. It is possible that the number of these clouds or electrons are underestimated. Therefore, the pulsars have challenged the models for Galactic electron density distribution," Han said.

As of March 2021, a sky patch of 126 square degrees of the Galactic Plane has been searched in the GPPS survey, accounting for about 5 percent of the planed sky.

Two experts, Prof. R.N. Manchester of CSIRO Astronomy and Space Science of Australia and Prof. J. M. Cordes from Cornell University, think highly of the discoveries.

About 40 pulsars found in the GPPS survey have a life-span of less than 30 milliseconds, which are newly discovered millisecond pulsars. "The GPPS survey has already increased the number of known MSPs by nearly 10 percent, a remarkable achievement," said Manchester.

He believed FAST holds promise for the study of pulsar astronomy, especially in pulsars detection.

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