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Chinese Academy of Sciences National Observatory released the current world's largest time domain multi-star spectral star table

via:中国新闻网     time:2021/11/12 15:00:58     readed:108


Double Star Schematic (NASA). Research team for map

China New Network November 11 (Reporter Sun Zifa) Reporter learned from the National Observatory of the Chinese Academy of Sciences on the 11th that the researchers used Guo Shoujing Telescope (Lamost, Daily Area Multi-Target Fiber Spectrum Astronomical Telescope) data, found 3133 spectrum Double star and 132 spectra Samsung, and accurately measure their viewing speed, 95% of the latest multi-star system, its achievements also become the largest time domain multi-star spectral star form published in the world.

This important astronomical results papers were jointly completed by the Beijing Normal University of the Chinese Academy of Sciences, the National Tianmin, the National Science, and Yan Hongliang, the Journal of China Academy of Sciences, Nanjing Astronomical Science Research Institute, the Chinese Academy of Sciences, have been completed in the internationally renowned Astronomical Journal of Tianwen Journal in the International Journal of Tianxia Physics Journal in International Journal of Tianxia Physics Journal " The issue will provide key data support to further promote problems such as two-star proportion and nature, and show the advantages of the resolution spectral spectral spectral spectral in Lamost.

双星系统中两颗子星的视向速度变化。 研究团队 供图

The viewing speed of the two substrings in the double star system changes. Research team for map

Introduction to the National Observatory Research Team of the Chinese Academy of Sciences said that about half of the Silver River system is in a two-star system. Through metering and spectral observation, researchers can get the accurate orbit parameters, stars quality, and radius information. At the same time, the material transfer that may occur in the two-star system also makes its evolution extremely complicated, so the two-star is an important member of the study of the formation and evolution of stars and even the Galaxy system.

Traditionally, one of the main means of the two-star system is to cover the law, but because the double star track is inclinant, the more difficult inclination is more difficult, so it cannot be used to observe the measurement, but the spectral observations can dispense these Double star certificate. It is important that spectral observations can provide information such as orbit parameters such as Shuangxing and stars atmospheric parameters, and other important information such as star quality, radius, and photome can be determined.

In addition, there are some special double star systems, including a "invisible" subster, which can be found and puminated by spectral observation. If this "invisible" Sprinter is a white dwarf, it is eventually possible to evolve into a type IA supernova, and if the subster is large enough, it may even be a black hole. Therefore, with the continuous accumulation of large-scale spectral patrol projects such as Lamost, it has become a hot spot in recent years by spectral methods.

The scientific research team said that researchers use the cross-correlated function to the Lamost, including the primary tuperal spectrum spectrum spectrum (Lamost DR7), which is the primary spectrum (Lamost DR7), and find two or three. The spectrum of the visual speed component. The final certificate recognizes 3,000 multi-spectral double star and Samsung system, and gives the viewing speed value of each sub-star each of the times. Thanks to the Lamost time domain patrol project, more than 2,500 targets in the multi-star system, including multiple observation data, of which 525 spectrosters and 31 Samsung were observed at least 6 times. Therefore, the Lamost data releases a multi-star star table having the largest time domain spectral information to date.

With regard to the follow-up research plan, the research team is expected to find about 1500 new spectral multi-star systems in resolution data in Lamost each year. With the development of resolution spectrum observations in Lamost, more and more multi-star systems will be It is found that the Lamost project will continue to make important contributions to relevant research. (over)

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