Compared to some active galactic nuclei (AGN), how is M31's central black hole currently characterized regarding accretion?

Answer

Relatively quiet, accreting matter at a low rate

Unlike some active galactic nuclei (AGN), M31’s central black hole appears relatively quiet on a cosmic timescale, accreting matter at a low rate.

Compared to some active galactic nuclei (AGN), how is M31's central black hole currently characterized regarding accretion?
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