Conveners
S1 - Black Hole Accretion and Outflows: Focusing on the physics of accretion disks, the mechanisms driving high-velocity winds, and the geometry of circumnuclear regions
- Paola Marziani (Istituto Nazionale di Astrofisica (INAF))
S1 - Black Hole Accretion and Outflows: Focusing on the physics of accretion disks, the mechanisms driving high-velocity winds, and the geometry of circumnuclear regions
- Paola Marziani (Istituto Nazionale di Astrofisica (INAF))
S1 - Black Hole Accretion and Outflows: Focusing on the physics of accretion disks, the mechanisms driving high-velocity winds, and the geometry of circumnuclear regions
- Alessandra Lamastra (Istituto Nazionale di Astrofisica (INAF))
-
Prof. Claudio Ricci (University of Geneva)15/06/2026, 10:15Talk
X-ray-emitting plasma is a ubiquitous feature of accreting massive black holes, but several of its properties and the mechanisms that power it remain unknown. In my talk, I will give an overview of recent findings on the properties of X-ray coronae and how they change with the Eddington ratio, including results from large studies of extremely variable AGN. I will also review recent millimeter...
Go to contribution page -
Susanna Bisogni (INAF-IASF Milano)15/06/2026, 10:45Talk
Unobscured, radio-quiet quasars define a tight correlation between X-ray and UV luminosities (the Lx-Luv relation), widely interpreted as the signature of disc-corona coupling. However, the physical origin of the scatter around the relation remains unclear, with X-ray-weak quasars representing its most extreme deviations. We assemble a statistically robust sample of more than 5000 quasars with...
Go to contribution page -
Luca Zappacosta (Istituto Nazionale di Astrofisica (INAF))15/06/2026, 11:30Talk
Shedding light on the nuclear properties of $z>6$ quasars (QSOs) powered by supermassive black holes (SMBHs) with masses $>10^9~M_\odot$ is fundamental to understand their rapid formation during the Epoch of Reionization (EoR). Probing the innermost regions of these QSOs via X-ray emission, at just a few tens of gravitational radii, provides the most direct window into the growing SMBH.
We...
Go to contribution page -
Elisa Amenta (Istituto Nazionale di Astrofisica (INAF))15/06/2026, 11:50Talk
Outflows in Active-Galactic Nuclei (AGN), either in the form of winds or jets, are now routinely detected at all ionisation states, velocities and distances from the inner SMBH. These range from the sub-relativistic (0.1 − 0.25c), highly ionised, ultra-fast outflows (UFOs), arising at few gravitational radii, down to the slower (∼ 500 − 2000 km/s) outflows detected on kpc-scales, in the atomic...
Go to contribution page -
Stefano Marchesi (Università di Bologna)15/06/2026, 12:05Poster + Flash talk
In this talk, I will present a review of the most recent results obtained by the Clemson-INAF CT-AGN collaboration. This project is based on the Palermo Swift-BAT catalog: by taking advantage of Swift-BAT effectiveness in detecting heavily obscured AGN at z~0, our group performed a multi-year, multi X-ray telescope effort aimed at obtaining a complete census of the obscured AGN population in...
Go to contribution page -
Prof. Francesco Tombesi (Tor Vergata University of Rome & INAF)15/06/2026, 12:20Talk
Ultra-fast outflows (UFOs) from accreting supermassive black holes provide a direct probe of the coupling between inflowing matter and powerful winds emerging from the inner accretion flow. These relativistic disk winds are now recognized as a key ingredient linking black hole accretion physics to feedback on galactic environments. Recent high-resolution spectroscopy with XRISM/Resolve reveals...
Go to contribution page -
Scott Hagen (Istituto Nazionale di Astrofisica (INAF))15/06/2026, 12:35Talk
XRISM has provided an unprecedented view of the emission and absorption lines in the X-ray. Notably, early results showed significant complexity to the Fe-Kalpha line profile in AGN, with clear contributions from at least three emitting structures: an inner disc, intermediary broad line region (BLR), and an outer torus. This poses a new challenge for the modelling of the emission lines, which...
Go to contribution page -
Alfredo Luminari (Istituto Nazionale di Astrofisica (INAF))15/06/2026, 12:50Talk
In this talk, I'll present a new application of the Time-Evolving PhotoIonisation Device (TEPID) code to a time-resolved NuSTAR+XMM-Newton spectrum of NGC 4051 from 2018. This nearby Seyfert I AGN is an ideal laboratory of the innermost accretion scale thanks to its brightness and wealth of spectroscopic features, from the optical to the X-rays. It hosts three disk winds with increasing...
Go to contribution page -
Ms Laura Borrelli15/06/2026, 14:30Talk
Ultra-fast outflows are highly ionized thick winds with characteristic absorption features (FeXXV and FeXXVI at 6.67-6.97 keV rest-frame) in the hard X-ray band, strongly blue-shifted by the extreme outflow velocities. These quasi-relativistic winds are thought to be the most promising mechanism powering AGN feedback, influencing the SMBH/host galaxy co-evolution. Assessing the relation...
Go to contribution page -
150. Beyond the dust: probing AGN-driven molecular outflows and phase-dependent extinction in ULIRGsGiovanna Speranza (Instituto de física fundamental (IFF, CSIC))15/06/2026, 14:45Talk
Understanding the structure and physical conditions of the active galactic nucleus (AGN) is essential for tracing how AGN interact with their host galaxies. High resolution multi-wavelength observations are required to probe the obscuring region directly, yet heavily dust-enshrouded systems often lack proper tracers. JWST overcomes many of these limitations, providing unprecedented sensitivity...
Go to contribution page -
Dr Chiara Niccolai (Scuola Superiore Meridionale)15/06/2026, 15:00Talk
The structure and physical properties of accretion discs in quasars remain poorly understood. A primary challenge lies in disentangling the degenerate roles of various physical parameters—such as black hole mass and spin, accretion rate, inclination, and environment—within the observed emission. A powerful method to mitigate these limitations is the analysis of variable quasars through...
Go to contribution page -
Dr Riccardo Middei (INAF-OAR)15/06/2026, 15:15Talk
Accretion onto supermassive black holes powers the most luminous persistent sources in the Universe: active galactic nuclei (AGN). Their emission is characterized by two distinct spectral components: thermal optical/ultraviolet radiation from an optically thick accretion disk and a power-law X-ray tail from a corona located in the innermost regions. Despite their prominence, how radiatively...
Go to contribution page -
Daniele Tagliacozzo (Università degli Studi Roma Tre)15/06/2026, 15:30Talk
The Imaging X-Ray Polarimetry Explorer (IXPE) is providing key measurements of the polarization of Radio-Quiet, unobscured AGN. In these sources the IXPE band (2–8 keV) is typically dominated by Comptonized emission from the corona, a cloud of relativistic electrons, whose shape and origin are debated, that up-scatters optical/UV photons from the accretion disk into X-rays. Because spectral...
Go to contribution page -
Alessia Tortosa (INAF - OAR)Talk
Understanding how supermassive black holes (SMBHs) rapidly grew in the early Universe is a central question in extragalactic astrophysics. I will present X-ray studies of extreme accretion onto SMBHs across cosmic history, combining results from local super-Eddington accreting AGN and hyper-luminous quasars at z > 6. Local super-Eddington systems show steep X-ray continua, extremely low...
Go to contribution page