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Jin, S.; Wang, J.; Kong, M. Z.; Shen, R. J.; Zhang, Y. X.; Xu, D. W.; Wei, J. Y.; Xie, Z.
Astrophysical journal/The Astrophysical journal, 06/2023, Letnik: 950, Številka: 1Journal Article
Abstract The feedback from the accretion of central supermassive black holes (SMBHs) is a hot topic in the coevolution of SMBHs and their host galaxies. By tracing the large-scale outflow using the line profile and bulk velocity shift of O iii λ 5007, the evolutionary role of outflow is studied here on a large sample of 221 type 2 quasars (QSO2s) extracted from Reyes et al. By following our previous study on local Seyfert 2 galaxies, the current spectral analysis on the Sloan Digital Sky Survey spectroscopic database enables us to arrive at the following results: (1) by using the Lick indices, we confirm that QSO2s are, on average, more frequently associated with younger stellar populations than Seyfert galaxies; (2) QSO2s with a stronger outflow tend to be associated with a younger stellar population, which implies a coevolution between the feedback from SMBHs and the host in QSO2s; (3) although occupied at the high L bol / L Edd end, the QSO2s follow the L bol / L Edd - D n (4000) sequence established from local, less-luminous Seyfert galaxies, which suggests a decrease of the accretion activity of SMBHs and also of feedback as the circumnuclear stellar population continuously ages.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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