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Electromagnetic Flares from Compact-object Mergers in Active Galactic Nucleus Disks: Signatures and Predictions

  • Authors: Hiromichi Tagawa, Zoltán Haiman, Shigeo S. Kimura, Hassen M. Yesuf, Hengxiao Guo

Hiromichi Tagawa et al 2026 The Astrophysical Journal 1006 .

  • Provider: AAS Journals

Caption: Figure 1.

A schematic illustration of EM flares associated with compact-object mergers within an AGN disk. Top row: during hyper-Eddington accretion of high-angular-momentum gas onto the merging binary, strong outflows are driven (ADIOS mode). If a persistent jet is present, it propagates through a cavity in the AGN disk without significantly interacting with dense material. Middle row: after the merger, the accretion mode transitions to a low-angular-momentum flow (ZEBRA mode), resulting in the formation of a quasi-spherical disk and a strong jet. The jet then collides with the CBD whose inner region now manifests as a ZEBRA flow (left), with dense winds (middle), or with AGN-disk gas (right). These interactions drive shocks, producing bright shock-breakout flares. Bottom row: the hot, shocked gas expands and cools outside the AGN disk, giving rise to an additional flare.

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