The many tones of accretion - to the memory of Tomaso Belloni

Session

Beyond Stellar-Mass BHs & New Windows. Session 4.1: AGN

10 Sept 2026, 09:45

Cefalù

79. AGN high energy emission: highlights from selected space missions.

Andrea Comastri (Istituto Nazionale di Astrofisica (INAF))

10/09/2026, 09:45

Talk

Deep JWST surveys have revolutionized our knowledge of the formation and early evolution of Active Galactic Nuclei at the cosmic dawn.
Webb uncovered a large population of compact Broad Lined AGN with moderate luminosities, log LBOL ~ 42-45, high redshifts, z > 4, and black holes’ inferred masses 106-8 MSUN. A subclass exhibits red, V-shaped UV-optical continua and is commonly classified as...

113. All they know is what they’re not: the accretion of neutrino-emitting blazars

Ms Gaia Delucchi (INAF Brera Astronomical Observatory)

10/09/2026, 10:15

Blazars are a class of AGN characterised by relativistic jets pointed towards our LoS. Traditionally, they are classified into two families: BL Lacs (no emission lines suggesting an inefficient accretion flow and faint bluer broad band SEDs) and FSRQs (strong emission lines, radiatively efficient accretion and brighter red SEDs). However, recent studies have highlighted that blazars identified...

88. Circumbinary accretion onto Supermassive Black hole Binaries with the presence of a Dark Matter Spike

Edwin Santiago (Instituto Nacional de Astrofísica, Óptica y Electrónica)

10/09/2026, 10:30

Talk

Since the Laser Interferometer Space Antenna (LISA) project was announced, interest in binary systems of supermassive black holes (SMBHBs) has grown, as it is expected that these systems will be observable with this instrument. In particular, efforts have been made to produce realistic simulations of SMBHBs surrounded by a circumbinary disk (CD), since this specific scenario could be the...

27. Variability Signatures of a Fluctuating AGN Warm Corona

Vishal Sudhakar (Georgia Institute of Technology)

10/09/2026, 10:45

Poster

Active Galactic Nuclei (AGN) serve as cosmic laboratories for probing extreme physics around supermassive black holes (SMBHs). The X-ray spectra of AGN exhibit an excess in flux above the base power-law continuum at energies below 2 keV, known as the soft excess. In addition, reverberation studies find low-frequency positive lags between the soft (0.3–1 keV) and hard (4–7.5 keV) X-ray bands. A...