Changing-look AGNs exhibit spectral changes because their accretion disks transition to a truncated state at low Eddington ratios around 2%, reducing ionizing photons and weakening broad emission lines.
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Accretion-Mode Transition: The Driver Behind Spectral Changes in Changing-Look AGNs
Changing-look AGNs exhibit spectral changes because their accretion disks transition to a truncated state at low Eddington ratios around 2%, reducing ionizing photons and weakening broad emission lines.