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Home / Science / The world’s largest telescope is expected to detect primitive gravitational waves from the Big Bang

The world’s largest telescope is expected to detect primitive gravitational waves from the Big Bang



The panorama taken on August 28, 2019 shows the Chinese 5 hundred meter aperture Spherical Radio Telescope (FAST) under maintenance in China’s southwestern Guizhou province. (Xinhua News Agency / Ou Dongqu)

On Wednesday, China announced that the 5 hundred meter aperture Spherical Telescope (FAST) – the world’s largest and most powerful radio telescope – has detected more than 240 pulsing stars and is expected to discovered the original gravitational wave of the Big Bang.

FAST will also be able to help extend China̵

7;s deep space exploration to the edge of the solar system, allowing the country to meet its major strategic needs.

According to Science and Technology Daily on Thursday, the China Academy of Sciences (NAOC) National Astronomical Observatory said in a news conference on Wednesday that since it passed the test and went into operation. in January, FAST was operating stably and reliably.

FAST has observed and served more than 5,200 hours since then, almost double its expected goal, NAOC said.

FAST has detected more than 240 pulse stars, and more than 40 high-level papers have been published based on telescope data.

NAOC notes that the FAST research results on the rapid radio explosion were published in the international scientific journal “Nature” early Thursday morning.

With its performance improvements, FAST’s scientific potential has gradually emerged, Science and Technology Daily reported.

“The sensitivity of FAST is 2.5 times more than the second largest single-aperture radio telescope in the world. This is the first time that the Chinese-made radio telescope ranks first in the world in terms of index. important in terms of sensitivity, said Jiang Peng, chief engineer and deputy chief executive officer of the FAST Center for Development and Operations.

Jiang notes that the extremely high sensitivity makes it possible to detect gravitational waves in nanohertz and gravitational waves at the beginning of the Big Bang, providing data to support the study of physical processes in The original point of the Big Bang.

In addition, FAST is capable of extending China’s deep space communications and exploration capabilities to the edge of the solar system, which will enable the country to meet its major strategic needs, media reports. said.

In February, nearly 100 scientists began to use and process FAST scientific data.

“In April, the telescope time allocation committee started attracting free application projects from the domestic astronomy community. More than 170 applications have been received, with a total posting time. signed about 5,500 hours. Only 30% of the actual approved 1,500 hours could be supported, which shows that the competition for FAST telescope observation time is quite stiff, ”said Chang Jin, member. The Chinese Academy of Sciences and NAOC director said.

The FAST was completed in 2016. Its reflective surface area is about the size of about 30 standard football fields, the report says.

Chang said FAST’s new design concept created a new paradigm for building giant telescopes that transcends the technical limitations of completely traditional motion radio telescopes with an approximate aperture. 100 meters.

FAST’s giant reflector can actively adjust the shape in real time depending on the position of the celestial objects. Its 30-ton cabin moves at an altitude of 140 meters and a range of 206 meters, all with millimeter control accuracy.

FAST also faces unprecedented engineering challenges due to the enormous engineering volume, the requirement for extremely high precision and exceptional working methods.

Thanks to that, the group of engineers have studied techniques to overcome many technical problems in the fields of mechanical engineering, measurement, control, materials, and large-scale structures.

The engineering team has developed a steel cable with super high fatigue resistance, 2.5 times higher than corresponding domestic and international standards. It also adopts an innovative two-stage tuning mechanism that includes the world’s largest single-beat flexible parallel robot and sturdy 6-degree freestyle parallel robot for high-precision positioning.

Global Times


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