China News Agency, Beijing, May 7 (Reporter Sun Zifa) A reporter learned from the National Astronomical Observatories of the Chinese Academy of Sciences on the 7th that the doctoral students Liang Xilong and Zhao Jingkun researchers recently used the Guo Shoujing Telescope (LAMOST, large-area area multi-target fiber spectroscopy telescope) With the homologous stellar data from the ESA Gaia Space Telescope (Gaia), a new mobile constellation of 206 member stars was discovered near the Orion Nebula in the Milky Way.
Astronomers said that the discovery of the moving constellation provides observational evidence for studying the possibility that the spiral-arm density wave drives the stars to gather and trigger the collapse of the nebula. In addition, this moving constellation located in the local spiral arm of the Milky Way also provides new research objects for the study of the collapse of the Stellar Group.
According to scientific researchers such as Liang Xilong and Zhao Jingkun of the National Astronomical Observatory of the Chinese Academy of Sciences, the detection and origin analysis of mobile constellations are of great significance for understanding the formation, structure and evolution of the Milky Way. Their detection requires reliable data such as self-propelled, apparent velocity and distance. Samples and advanced and effective detection methods. The combination of LAMOST's massive spectral data and Gaia's astronomical data provides astronomers with a unique advantage in detecting moving constellations.
The newly discovered moving star cluster in the Milky Way contains a total of 206 member stars, 74 of which are pre-main sequence stars (the original stars whose central hydrogen has not yet ignited), and the rest are "G, K giant stars" (spectral types are G and K Of the brighter stars that have left the main sequence).
Scientific analysis shows that the pre-main sequence stars in the mobile constellation are formed in the Orion Nebula, and the "G, K giant" and the stars in the Orion nebula are in different evolutionary sequences. They were not born in the Orion nebula. At the same time, the pre-main sequence stars in its member stars have confirmed that some of the stars formed in the Orion Nebula are spreading out, and the "G, K giant" may have gathered together with the peak of the spiral arm density wave. It is gradually spreading out as the peak of the density wave leaves.
It is understood that the National Astronomical Observatory of the Chinese Academy of Sciences researchers have discovered an important astronomical discovery and related research papers in the Milky Way, which has been published by the international academic journal Astronomical Journal. (Finish)