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Active Galactic Nuclei XVI: A Sea of Discoveries

14–19 Jun 2026
Brindisi
UTC timezone

Session

S4 - Binary and Dual AGN Systems: Studying the observational signatures, dynamics, and gravitational wave implications of closely separated and merging black hole systems

16 Jun 2026, 16:25
Sala Conferenze presso Autorità di Sistema Portuale (Brindisi)

Sala Conferenze presso Autorità di Sistema Portuale

Brindisi

Presentation materials

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  1. 94. (Review) Dual and Binary AGN: observational signatures and connections to Gravitational-Waves
    Paola Severgnini (Istituto Nazionale di Astrofisica (INAF))
    16/06/2026, 16:25
    Talk

    Binary and dual massive black holes (MBHs) are a natural outcome of galaxy mergers. Systems in which both black holes are active (dual and binary active galactic nuclei, AGN) provide a unique opportunity to study the dynamical evolution of merging galaxies, the triggering of accretion, and the processes that lead to the formation of gravitational-wave (GW) emitting MBH binaries.
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  2. 142. Multiple AGN systems at z ~ 3 revealed by JWST/NIRSpec IFU
    Dr Michele Perna (Centro de Astrobiología (CAB), INTA-CSIC)
    16/06/2026, 16:55
    Talk

    Dual and multiple AGN provide a unique window into black-hole growth, galaxy interactions, and feedback in dense environments, yet they remain poorly constrained at high redshift. I will present JWST/NIRSpec IFU observations of GS10578, a massive quenched galaxy at z=3.06 hosting an X-ray AGN that drives multiphase outflows, with a close secondary AGN at a projected separation of 5 kpc....

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  3. 28. Dual AGN and where to find them
    Filippo Mannucci (Istituto Nazionale di Astrofisica (INAF))
    16/06/2026, 17:10
    Talk

    SMBH grow through both accretion and merging. The effect of this latter channel is debated, together with the effect of galaxy merging on AGN activity. Being produced by two SMBH in the a common host galaxy in the process of merging, Dual AGN at kpc separations can shed light on these two important effects. The models of galaxy/SMBH co-evolution are producing a number of critical predictions...

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  4. 42. Black Hole Growth in the Densest Regions of the Universe: AGN activity in protoclusters from Cosmic dawn to the present days
    Alberto Traina (Istituto Nazionale di Astrofisica (INAF))
    16/06/2026, 17:25
    Talk

    Recent observations suggest that active galactic nucleus (AGN) activity is enhanced in overdense environments, such as galaxy protoclusters, compared to the field. However, these results are based on limited observational samples and heterogeneous selections of AGN and host galaxies, making it difficult to identify the physical origin of this apparent enhancement and to disentangle genuine...

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  5. 169. (Highlight) Gravitational Waves from the Cosmic Dawn: Tracing Cosmic Black Hole Binaries with ET, LGWA and LISA
    Rosa Valiante
    17/06/2026, 09:30
    Talk
  6. 111. Dual AGN at Cosmic Noon: Bridging Observations and Theory with the First Statistical Sample
    Martina Scialpi (Università di Firenze, Università di Trento, INAF/OAA)
    17/06/2026, 09:50
    Talk

    A large population of AGN pairs residing in the same galaxy, the so-called dual AGN, is predicted to exist at redshifts z>0.5. These systems constitute the parent population of merging black holes (BHs), making their number and properties a key ingredient for theoretical predictions of the gravitational-wave (GW) background and event rates probed by pulsar timing array (PTA) experiments and by...

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  7. 170. MBH pairs below 100 pc (and more?): toward robust detection strategies
    Fabio Rigamonti
    17/06/2026, 10:05
    Talk
  8. 171. Did We Just Confirm a Gravitational Wave Recoiling Black Hole in 3C 186?
    Marco Chiaberge
    17/06/2026, 10:20
  9. 45. The role of major mergers in triggering super-Eddington accretion
    Riccardo Caleno (Sapienza Università di Roma)
    17/06/2026, 10:35
    Talk

    JWST observations have opened a new window on the early Universe, revealing black holes with masses of several million solar masses already at z>8, which challenge our understanding of their accretion mechanisms. In recent years, super-Eddington accretion has emerged as a promising solution and has been adopted in both simulations and semi-analytical models.

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