The research team headed by the National Astronomical Observatories of the Chinese Academy of Sciences recently found a strange celestial body based on the large scientific device Guo Shoujing telescope. Its lithium content is about 3,000 times that of similar celestial bodies. It is the star with the highest lithium content in humans. International Journal "Nature and Astronomy" released this scientific discovery online on the 7th.
LAMOST finds a schematic diagram of a rich lithium star. The giant fireball is a schematic representation of a newly discovered star. It is found in the star field of the white circular area. The lower left corner shows the spectrum of the star taken by LAMOST. The background is this Photo of the real Milky Way in the vicinity of the star. Chinese National Astronomy Drawing
Lithium is a key element in connecting the Big Bang, interstellar matter and stars. Its evolution in the universe and stars has always been an important topic in the field of astronomy, but contemporary astronomy has a lot of limitations on the understanding of lithium. Lithium-rich superstars are rare, and they are important in revealing the origin and evolution of lithium. For the past 30 years, astronomers have only found a very small number of such celestial bodies.
With the development of the Guo Shoujing telescope and the sky survey program, its massive stellar spectroscopy capability has gradually played a role in astronomical basic research, playing a vital role in this scientific discovery. This newly discovered lithium-rich star comes from the center of the Milky Way. The direction of the constellation, located north of the Milky Way disk, about 4,500 light years from Earth.
Dr. Yan Hongliang from the National Astronomical Observatory, Researcher Zhao Gang and Researcher Shi Jianrong, while achieving this important discovery, collaborated with scientists from universities such as the China Institute of Atomic Energy, Beijing Normal University, etc. to conduct in-depth research on this strange star. They found this The lithium element of a star is likely to come from a special material exchange process inside the star, combined with the high-resolution spectrum of the American Automatic Planetary Searcher Telescope (APF) and the latest atomic data of the China Institute of Atomic Energy, to reproduce it through simulation. The internal experience changes, thus giving a reasonable explanation for the lithium content of this star.
According to reports, this discovery has changed human cognition of lithium in celestial bodies, doubling the international limit of lithium content observation. At the same time, this study theoretically highlights the synthesis of lithium and the existing theory of stellar evolution. New point of view.