The reporter learned from the National Observatory of the Chinese Academy of Sciences that after years of in -depth cooperation research, the National Observatory Galaxy Corporation Acoustic Study Group and international counterparts have developed a new method of extracting multi -point association functions from the two -point association function of the galaxy.The results were published in the international academic journal “Nature” “Communication Physics” on April 19th, Beijing time.
In the current accurate cosmic era, large -scale galaxies red -movement sky patrol is a weapon for exploring the universe.By measuring the spectrum of a large number of distant celestial bodies, scientific researchers can use the Red Move Tour Tian to obtain the density field during different evolutionary periods of the universe.The galaxy density field contains important galaxy group information, which is specifically reflected in the two and multi -point association functions of the galaxy.
The multi -point correlation function of the galaxy is highly complementary to the two -point association function, which is very important for studying dark energy, dark matter and gravity.However, due to the complexity of the multi -point correlation function, it is challenging for its measurement and modeling, so there is a bottleneck in cosmic applications.Based on the galaxy density field reconstruction technology, the research group is accurately and efficiently extracted by the method of organizing the density field before and after the reconstruction, and the function information of most three and four -point related function information is based on DESI, PFS and ChinaThe next -generation large galaxy patrolling in the space station to carry out cosmology has provided new ideas and opened up new ways.
Source: CCTV News
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