Under the support of the National Natural Science Foundation of China (Grant Nos.
Galaxies are the basic units of the universe, and the formation and evolution of galaxies are one of the keys to understanding the evolutionary history of the universe and limiting cosmological parameters
Using the latest galaxy spectral data released by the Sloan Sky Survey (SDSS), the research team constructed a series of quasar subsamples based on the spectral characteristics of active galaxy outflows, corresponding to the early, middle, and late stages of quasar evolution, and then The star formation rate of each subsample is calculated in detail
Based on the above findings, the research team proposed that in the early stage of active galaxies, the strong outflow driven by the black hole in the center of the galaxy only existed on a small scale in the center of the galaxy, and had no effect on star formation; when the outflow grew to the galaxy scale, the outflow had an impact on star formation.
This work clearly shows that the outflow of active galaxies has a global negative feedback effect on galaxy evolution, which provides key observational facts for understanding the co-evolution of supermassive black holes in the center of galaxies and host galaxies, and is very helpful for ending galaxy evolution.
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