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Elisa Costantini (SRON, Netherlands Institute for Space Research)19/06/2026, 09:40Talk
XRISM, the Japanese/American X-ray observatory with significant European contribution, was launched in 2023, with the promise to revolutionise our understanding of a number of astrophysical phenomena.
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The exquisite energy resolution of the Resolve calorimeter has allowed us to investigate large scale structures and accretion disks, in addition to a rich observatory science program. In this... -
Matilde Signorini (Istituto Nazionale di Astrofisica (INAF))19/06/2026, 10:00Talk
The non-linear relation between X-ray and UV luminosities in quasars, usually parametrised as log(LX) = γ log(LUV) + β, is one of the most direct observational signatures of the coupling between the accretion disc and the X-ray corona. Beyond its astrophysical relevance, its non-linearity makes it a powerful tool for measuring cosmological distances, allowing quasars to be used as...
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Dr Francesco Ubertosi (Università di Bologna)19/06/2026, 10:20Talk
In idealized, dynamically relaxed galaxies, groups or clusters, the central galaxy is expected to reside at the bottom of the gravitational potential well, coinciding with the peaks of the multiphase cooling gas - hot, warm, and cold - that flows in to fuel star formation and the central supermassive black hole (SMBH). However, spatial offsets between the central galaxy and these gas phases...
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Monica Natalia Isla Llave (Istituto Nazionale di Astrofisica (INAF))19/06/2026, 10:35Talk
Galaxy protoclusters (PCs) at $z\gtrsim2$ are dense regions extending up to few Mpc in which massive cold gas and elevated rates of galaxy interactions trigger intense, often dust-obscured, star formation in the member galaxies. These mechanisms are also expected to promote super-massive black hole (SMBH) growth, but this possible environmental effect remains unclear, largely due to the...
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Stefano Cristiani19/06/2026, 10:50
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Virginia Lucia Cavicchi (Istituto Nazionale di Astrofisica (INAF))19/06/2026, 11:35Talk
Simulations and theory struggle to explain the existence of supermassive black holes at z>6, i.e. after less than 1 Gyr after the Big Bang, but all models expect that they formed in the most massive haloes of the early Universe. A direct and testable consequence is that z>6 quasars should be surrounded by overdensities of galaxies extending up to 8 Mpc, but observational studies returned...
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Lucia Fiorani (Università di Bologna)19/06/2026, 11:50Talk
Recent observations carried out with the Atacama Large Millimeter/submillimeter Array (ALMA) show that the density of the galaxies' interstellar medium (ISM) increases toward earlier cosmic epochs, evolving approximately as $(1+z)^{3.3}$. At $z>3$, the gas column density along the nuclear line of sight can exceed by more than two orders of magnitude the typical values observed in local...
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Vieri Cammelli19/06/2026, 12:05Talk
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Alessandro Trinca19/06/2026, 12:20Talk
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Matteo Fanelli (Istituto Nazionale di Astrofisica (INAF))Poster + Flash talk
Our study focuses on Hyper-luminous Quasars (HyLQSOs), highly accreting SMBHs at z$\sim$2-4.5 ("cosmic noon”), which drive powerful AGN feedback via extreme energy release.
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The WISSH project studies 85 of these sources (LBol$\geq 2\times 10^{47}$ erg/s), confirming they host massive SMBHs ($M_{BH}\geq 2\times 10^{9} M_{\odot}$) and launch powerful, high-velocity outflows (up to 50,000 km/s).... -
Paolo Tozzi (Istituto Nazionale di Astrofisica (INAF))Talk
The large scale structure of the Universe at redshift 2<z<3 is
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displaying a transition from the most overdense protoclusters to the
first massive, virialized halos, on a time scale of about one
Gyr. While gravity is driving this evolutionary step, a plethora of
very energetic phenomena becomes visible at all wavelengths in the
member galaxies. Particularly, high-resolution X-ray...
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