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- W2015693457 abstract "The transition of a standard thin disc to a radiatively inefficient accretion flow (RIAF) is expected to occur when m similar to m(crit)(m =. M/M-Edd). The radiative efficiencies of accretion flows accreting at rates lower than the critical accretion rate m(crit) become significantly lower than those of standard thin discs. It is believed that the initial transition radius is small just after the accretion-mode transition, and then the transition radius increases with decreasing accretion rate, as suggested by some theoretical models and observations. Based on such variable transition radius models, we derive how the accretion rate m(t) evolves with time from the observed Eddington ratio distribution for a sample of low-luminosity active galactic nuclei in the local universe. The derived time-dependent accretion rates m(t) show a rapid decrease after the transition of the standard thin accretion disc to a RIAF, which is consistent with that derived from the hard X-ray background." @default.
- W2015693457 created "2016-06-24" @default.
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- W2015693457 date "2007-05-01" @default.
- W2015693457 modified "2023-09-23" @default.
- W2015693457 title "Constraints on radiatively inefficient accretion history from Eddington ratio distribution of active galactic nuclei" @default.
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- W2015693457 doi "https://doi.org/10.1111/j.1365-2966.2007.11610.x" @default.
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