Refresh the world record!

Recently, the my country Eye Satellite Team found that the neutron X -ray two stars with SWIFT J0243.6+6124 found a rotary absorption line with an energy of up to 146,000 electron volts, and the corresponding neutron star surface magnetic field strength exceeded 1.6 billion Tesla. Related research results are published online in "Celestial Physics Magazine Communication".

"This is the world's record of the highest energy recovery line and the strongest magnetic field of the universe's strongest magnetic field directly after 2020 to the strongest magnetic field of the universe that directly measured to about 1 billion Tesla in 2020." In an interview with a reporter from the Science and Technology Daily, Zhang Shuangnan, chief scientist of Hui Eye Satellite and researcher at the High Energy Institute of the Chinese Academy of Sciences.

Wisdom Satellite Observation Pulse Star Art Picture. The picture is provided by the Chinese Academy of Sciences.

The neutron star is the strongest celestial body in the universe. The neutron X -ray dual -star system is composed of neutron stars and its stars. With the stars, the gas will fall to the neutron star under the strong gravity of the neutron star, forming a gas disk around the high -speed rotation of the neutron star, that is, the accumulation disk. The substance on the accumulation disk will fall along the magnetic line to the surface of the neutron and emit a strong X -ray radiation. With the rotation of neutron stars, the radiation will form a periodic X -ray pulse signal, so this type of celestial body is also called "X -ray suction pulse star".

A large number of observations have found that this type of celestial bodies will appear "depression" structure on X -ray radiation. The theory believes that this is caused by the electronic resonance scattering of the electrons in the magnetic field. Therefore, this "depression" structure is called a rotary absorption line. The energy at the absorption line corresponds to the strength of the magnetic field. The magnetic field strength.

"The magnetic field intensity corresponding to the energy at the rotary absorption line is the magnetic field strength of the neutron star surface. This is the only way to directly measure the strength of the neutron surface magnetic field." Zhang Shuangnan said.

In the past, astronomers found ultra -bright X -ray pulse stars in multiple galaxies outside the galaxy, and speculated that the magnetic field strength of the pulse star was very high, but they had not found direct measurement evidence.

"This discovery is not only the highest record of the direct measurement of the cosmic celestial magnetic field so far, but also the first time that the surface magnetic field of the star star is directly measured in the super -bright X -ray source." Zhang Shuangnan said.

In Zhang Shuangnan's view, the achievement of this achievement is inseparable from the unique advantage of wisdom -eye satellites. Huiyi Satellite is the first X -ray astronomical satellite in my country. It carries three scientific loads and space environment monitors: high -energy X -ray telescope, medium -capable X -ray telescope and low -energy X -ray telescope.

"Compared with foreign X -ray satellites, Huiyi Satellite has outstanding advantages such as the largest area of ​​effective area, high time resolution, high time resolution, and no photon accumulation effect in high energy X -ray energy sections. The new window of the rapid light changes of neutron stars and the research of the energy spectrum. "Zhang Shuangnan said.

Source: Science and Technology Daily

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