Detecting a large black hole in the constellation Sagittarius

Circle white is the position of a black hole, which is proved by scientists

After eight years of research, the international astronomical team led by the researcher Judge Cuong (ShenZhiQiang) of the Shanghai Science Institute observatory found evidence that the constellation A * in Central The center of the Milky Way is a supermassive black hole.

Since 1997, Tham Chi Cuong and his collaborators, including Lu Quoc Dung (LuGuoYong), Head of the US National Radiological Observatory, Luong Mao Xuong (LiangMaoChang) of the California Institute of Technology, Lower Sangha (HeCengPu) and Zhao Quan Huy (ZhaoJunHui) of the US Smithsonian astrophysics center focused on this object.

Finally, they measured the diameter of the Sagittarius A * by about 150 million kilometers, which is equivalent to the orbital radius of the earth. The team successfully captured the most up-to-date 'Electric Radiation' of this black hole.

The international team has monitored 10 telescopes in the Northern Hemisphere and used new methods to improve monitoring accuracy. They finally got the first high-resolution 3.5mm high resolution wave in the world. This is the highest spatial resolution ratio provided in astronomy.

Although the monitoring results were successful since November 2002, but because the A * Sagittarius constellation is located in the Antarctic sky while most telescopes are located in the Northern Hemisphere, it is necessary to obtain accurate results. Accumulate a large amount of data, resulting in a few years. To observe and measure for 5 hours, scientists had to wait for 20 months, because this measurement was heavily influenced by the weather.

Black holes are one of the key issues that study the origins of the universe. Black holes are formed from a falling star. The black hole is usually divided into 3 types, the first is the super-black hole located in the center of the system; the second type is a planetary black hole , which is about 10 times larger than the sun; the third type is a medium-sized black hole between the two.

Since light does not escape the gravitational pull of a black hole, from the outside, the celestial body is black. This makes it difficult for astronomers to search for black holes, only to rely on the behavior of "swallowing" the nearby objects of the black hole to determine its existence. This is also one of the most challenging problems of modern astrophysics: how to validate black holes from observation.

Regarding the problem of black hole origin and whether it is lost or not, there is no conclusion at all. Currently, scientists around the world are working together to build the world's largest electromagnetic radiation telescope from high-precision, 12-meter, 64-sided antennas. The telescope is located in Chile's Atakama Desert, 5000 meters above the sea, and monitoring is expected to begin in 2010. This telescope in terms of functionality will outperform the Hubble space telescope about 10 times, which will promote the study of super-large blocks of monitoring at the center of the Milky Way.

Tuyet Nhung ( According to Xinhua )