"Mist Wind Double Star": Two rare star systems found in the universe [Picture]

Xinhua News Agency, Beijing, July 15th (Wei Mengjia, Yang Menghan) The international team led by Professor Zhu Wei, Department of Astronomical from Tsinghua University recently announced that two rare star systems were found in the universe. The system is composed of two central stars around each other, surrounded by gas and dust disks, and the orbit between the disk and the central star is a certain angle, showing the fantasy effect of "fog around the two stars".

These two papers discovered by Xinshe, named Bernhard-1 and Bernhard-2, were published online online in the international academic journal "Celestial Physics Magazine Express".

Double -star system renderings produced by the scientific research team. (Picture from the scientific research team)

The original star disk is a dense gas surrounded by the newly formed star. It is understood that because the two stars and its original star disk are condensed from the same huge rotation nebula, the disk is usually located on the same plane as the star's track, just like the orbit of most planets and satellites in the solar system is located on the same plane. The same. However, there is still a rare double star system in the universe, that is, the orbital plane of the original star disk surrounding the two stars and the stars.

Zhu Wei introduced that due to this tilt, the original star disk will swing like a gyro. This movement is called "progress". When the "progress" occurs, the original star disk will move between the earth and the stars, and it will be around the double star for a week every decades, resulting in a regularity of the brightness of the double star. In addition, due to the obstruction effect of the original star disk, the total brightness of the double star will also cause periodic changes, producing a unique light variable curve. Bernhard-1 and Bernhard-2 newly discovered celestial bodies are these rare double star systems.

The scientific research team observed that Bernhard-1 was in a dark state every 192 days, and Bernhard-2 was in a dark state for 20 days every 62 days. From the perspective of the earth, these dark state indicates that a star in each double star is moving behind the disc. When the star reappears, the brightness of the system returns to normal.

Zhu Wei said that these two dual -star systems are 3,000 light years from Earth to 10,000 light years, and enthusiasts with a caliber telescope with a caliber of 20 cm or more than 20 cm can see their brightness changes, but unfortunately, the existing telescope also Unable to distinguish between double stars and the original stars.

"Discovering this rare and strange system is of great significance for us to understand the formation of the planet." Zhu Wei said that because the original star plate is the birthplace of the planet, the emergence of the double -star system will help researchers to study more in -depth co -coexistence structures more in depth. "We also believe that in the near future, there will be more discovery of such rare celestial bodies in the near future."

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