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Dr. Ghirlanda, Giancarlo (Istituto Nazionale di Astrofisica (INAF))06/05/26, 16:20
The detection of GW170817 and its electromagnetic counterparts—a short gamma-ray burst (sGRB) and a kilonova—pioneered the era of multi-messenger astrophysics. This event confirmed binary neutron star (BNS) mergers as progenitors of sGRBs and primary sites for r-process nucleosynthesis. By combining gravitational and electromagnetic data, it was possible to constrain the speed of gravity, the...
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Mastrogiovanni, Simone (INFN Roma)06/05/26, 16:45
The multi-messenger detection of the binary neutron star merger GW170817 on August 17, 2017, marks the birth of gravitational-wave (GW) cosmology. GW sources are self-calibrating standard sirens; from their detection, it is possible to directly estimate the luminosity distance of the source. If provided with a redshift estimate, as in the case of GW170817 through spectroscopy of its host...
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Ugolini, Cristiano (GSSI)06/05/26, 17:05
Stellar clusters are efficient factories of dynamical interactions that shape the black hole (BH) mass distribution observed by gravitational-wave (GW) detectors. Their ability to pair and retain BHs enables the formation of remnants more massive than those produced through isolated binary evolution. This is a crucial difference among binary BH formation channels, as highlighted by events such...
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Simonato, Filippo (Istituto Nazionale di Astrofisica (INAF))06/05/26, 17:20
I buchi neri di massa intermedia (IMBH), con masse comprese tra $10^2$ e $10^5$ M$_{\odot}$, rappresentano un anello mancante cruciale tra i buchi neri stellari e quelli supermassicci. La loro esistenza è ancora oggetto di dibattito osservativo, ma numerosi scenari teorici suggeriscono che possano formarsi in ambienti stellari densi attraverso interazioni dinamiche. Ammassi giovani e compatti...
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De Santis, Alessio Ludovico (GSSI)06/05/26, 17:35
The landmark multi-messenger observations of the binary neutron star (BNS) merger GW170817 provided firm evidence that such mergers can produce short gamma-ray bursts (sGRBs). However, the scarcity of BNS detections in recent gravitational-wave (GW) observing runs raises a critical question: are BNS merger rates high enough to account for the full population of observed sGRBs?
We address...
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Allocca, Annalisa (INFN)06/05/26, 17:50
The Cosmological Constant problem is one of the most persistent unresolved issues in theoretical physics, arising from the fundamental incompatibility between Quantum Field Theory and General Relativity. Addressing this challenge, the Archimedes experiment investigates the potential coupling between zero-point quantum fluctuations of the electromagnetic field and gravitational interactions....
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Dr. Natalucci, Lorenzo (Istituto Nazionale di Astrofisica (INAF))06/05/26, 18:05
Recent observations of the transient sky at all wavelengths are increasingly revealing the importance of the multi-messenger and multi-wavelength approach. The GRINTA (Gamma-Ray INternational Transient Array Observatory) mission, to be launched at the middle of the next decade, is a small gamma-ray observatory with good sensitivity, excellent angular resolution and fast follow-up capability...
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Ballelli, Matteo (GSSI)06/05/26, 18:20
We present an improved parametric model for neutrino emission from core-collapse supernovae that directly connects neutrino luminosity and average energy to stellar properties during the emission. Our model incorporates two critical physical processes: convection within the proto-neutron star (PNS) and the evolving dynamics of neutrinosphere radii during the early emission phase. Crucially,...
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