Fast radio telescope enabled today received 1351 light-years from the pulsar signal

The FAST radio telescope has been received today enabled: 1351 light-years away in the pulsar signal source: in China completed 500 meter aperture spherical radio telescope FAST overall project, researchers through an experimental observation in recent days, successfully received pulse signal from the 1351 light years outside a pulsars, this is the FAST experimental observation has received the best quality of a group of electromagnetic wave signal. The acquisition of this signal is conducive to further analysis of the performance of the FAST telescope and subsequent debugging. Such testing and commissioning will continue for a period of time until the telescope achieves the best performance. Since the middle of September this year, FAST engineering researchers began to conduct experimental observations of radio telescopes. In a September 17th observation, the FAST telescope successfully received a set of high quality pulsar signals from the distant universe. This set of signals is the highest signal to noise ratio received by FAST since it was put into trial. The researchers calculated the distance between the pulsar and the earth from the phase diagram. Qian Lei, associate professor at the National Astronomical Observatory of the Chinese Academy of Sciences: the best pulsar data we have observed is J1921+2153. This is a pulsar located 1351 light-years away, which means that the electromagnetic waves we receive now are about 1351 years ago. It is understood that due to the pulsar and no obvious characteristics, so in order to facilitate scientific research on it in the "J1921 2153" this name, this is also the position of the stars. As the pulsar rotates at a slower rate, the difference in energy between the rotation speed will be converted to radiation, which is received by the FAST telescope. After the preliminary analysis of the raw data obtained by the FAST, the researchers obtained the frequency phase diagram of the two pulse signals. Qian Lei, a research associate at the National Astronomical Observatory of the Chinese Academy of Sciences, is a typical pulsar signal. Where the light is, it means there is a signal, the brighter it is, the stronger the signal. It has an effect that the high frequency electromagnetic wave comes first, then the low frequency electromagnetic wave, it satisfies the relation of two times, so it looks like an arc. According to experts, the frequency of electromagnetic wave propagation in the interstellar medium and the path is not the same, so researchers can use this phenomenon to infer the distance between the pulsar and the earth. Chinese Academy of Sciences, deputy director of the National Astronomical Observatory Qian Lei: high frequency electromagnetic wave to reach us, low frequency electromagnetic wave it will have a delay. Then you can imagine that when you spread a large distance, the amount of delay is relatively large, when you are close to the time, this delay is relatively small. The amount of delay can be used to infer the distance between the pulsar and the earth. Pulsar is a neutron star with super strong magnetic field in the universe. Pulsar in 1967.相关的主题文章: