Conveners
Morning session
- Gregory Vereshchagin (ICRANet)
Morning session
- Nathalie Deruelle
Morning session
- Tsvi Piran (The Hebrew University)
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Prof. Aldo Treves ( Università dell’Insubria)16/05/2022, 09:00
I recall the beginning of Remo’s remarkable career through three meetings/schools we have attended together: Bologna University 1967, Brandeis Summer School 1968, and Les Houches Summer School 1972
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Asghar Qadir (None)16/05/2022, 09:15
Ruffini-Arguelles-Rueda (RAR) proposed that a self-gravitating gas of degenerate
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massive sterile neutrinos (or neutralinos) that forms a fully degenerate core, could not only explain the supermassive black holes that lie at the cores of galaxies (some of which date to very early times) but also provide the dark matter. Here we suggest that baryons would also fall into the gravitational wells... -
Tsvi Piran (The Hebrew University)16/05/2022, 09:30
According to the Collapsar model, Long GRBs arise during a collapse of a massive star. The collapsing core produces a jet that penetrates the stellar envelope and the gamma-rays are generated once the jet is well outside the star. The jet propagation inside the stellar envelope is not simple. The interaction of the jet with the envelope dissipates the jet energy (as long as the jet is within...
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Jorge Armando Rueda Hernandez (ICRANet)16/05/2022, 10:10
Since I arrived in Italy in 2006 as a graduate student, Remo Ruffini has been a constant guide for me in relativistic astrophysics. In this talk, I recall some of the most important scientific achievements we have been engaged in together. In essence, a new way of looking at relativistic stars, a new way of looking at the gamma-ray bursts and related transient high-energy phenomena, and a new...
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Narek Sahakyan (ICRANet-Armenia)16/05/2022, 11:05
ICRANet activities in Armenia will be presented. I will discuss the recent progress in multiwavelength and multimessenger observations of blazars and the current status of the theoretical models applied to model their emission.
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R. Moradi16/05/2022, 11:45
A time-resolved analysis of GRB 180720B confirms its binary-driven hypernovae (BdHN) I nature. The accretion of supernova (SN) ejecta onto the neutron star (NS) companion leads to its gravitational collapse forming a black hole (BH). The accretion onto the newborn NS ($\nu$NS) spins it up to a millisecond pulsar. By interpreting the data, we identify six episodes in addition to the X-ray, GeV,...
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Prof. Chen Pisin (Leung Center for Cosmology and Particle Astrophysics, National Taiwan University)16/05/2022, 12:25
One longstanding mystery in bio-evolution since Darwin’s time is the origin of the Cambrian explosion that happened around 540 million years ago (Mya), where an extremely rapid increase of species occurred. Here we suggest that a nearby GRB event 500 parsecs away, which should occur about once per 5 Gy, might have triggered the Cambrian explosion. Due to a relatively lower cross section and...
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Thibault Damour17/05/2022, 09:00
We will describe the theoretical basis that allows one
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to use the timing of binary pulsars to test, with high precision, many
aspects of relativistic gravity (including the strong-field regime and radiative aspects of gravity).
All currently existing pulsar experimentals tests are in excellent agreement with
the predictions of general relativity. -
Demetrios Christodoulou17/05/2022, 09:30
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Robert Theodore Jantzen (Villanova University)17/05/2022, 09:35
Remo likes 50 year anniversaries although is always not too concerned with the number of years being exactly 50, but this year 2022 is exactly the 50th anniversary of our meeting at Princeton in the spring of 1972, which completely changed the rest of my life and led to my adoption by Italy and a second life based in Rome filled with so many positive personal relationships.
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Roy P Kerr (Canterbury University)17/05/2022, 10:00
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Rashid Sunyaev (Space Research Institute (IKI) of the Russian Academy of Sciences, Max Planck Institute for Astrophysics and Institute for Advanced Study, Princeton)17/05/2022, 10:30
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Vladimír Karas17/05/2022, 11:15
Flow lines of plasma near a weakly magnetised Kerr-Newman black hole were studied in seminal papers by Ruffini, Damour, Hanni, and others in 1970s. Here, following Karas & Vokrouhlicky, we recall the motion of charged particles around magnetized black holes within the framework of the guiding centre approximation, construct surfaces of constant magnetic and electric fluxes, and show the shapes...
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Pascal Chardonnet17/05/2022, 11:30
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Demetrios Christodoulou17/05/2022, 12:00
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Tsvi Piran (The Hebrew University)17/05/2022, 12:05
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Peter Predehl (Max-Planck-Institut für extraterrestrische Physik)17/05/2022, 12:10
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Prof. Rashid Sunyaev (Space Research Institute (IKI) of the Russian Academy of Sciences, Max Planck Institute for Astrophysics and Institute for Advanced Study, Princeton)17/05/2022, 12:15
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Agnès Rampal, Xavier Latour17/05/2022, 12:30
Greetings to Prof. Ruffini, in representation of the Mayor of Nice, H.E. Christian Estrosi by Agnès RAMPAL (Adjointe to the Mayor of Nice) and by Xavier LATOUR (Vice-président de la Métropole Nice Côte d’Azur)
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Bing Zhang (University of Nevada, Las Vegas)18/05/2022, 09:00
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Lorenzo Amati (INAF - OAS Bologna)18/05/2022, 09:30
The correlation between spectral peak energy, Ep,i , and isotropic-equivalent total radiated energy, Eiso, referred to as "Amati relation" in the scientific literature, is one of the most relevant and investigated properties of Gamma-Ray Bursts (GRBs) , with strong implications for prompt emission physics, identification and understanding of different sub-classes, using these phenomena for...
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Jorge Armando Rueda Hernandez (ICRANet)18/05/2022, 10:10
I will give an overview and show the latest developments about the physical ingredients and associated observables of the binary-driven hypernova (BdHN) scenario of long gamma-ray bursts (GRBs). In particular, I focus on the role of the newborn neutron star (newNS) formed in the core-collapse supernova (SN) of the carbon-oxygen (CO) star, the NS binary companion, and the black hole (BH) formed...
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Ehud Nakar18/05/2022, 11:05
I will discuss various constraints, derived from radio, optical and gamma-ray observations, on the properties of the energy source in long gamma-ray bursts. First, I will present a study of the observational imprint of a jet driven explosion and compare it to available data to determine whether the jet can generate both the gamma-ray burst and the associated supernova. Second, I will show an...
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Liang Li (ICRANet, Piazza della Repubblica 10, I-65122 Pescara, Italy)18/05/2022, 11:40
The binary-driven hypernova (BdHN) model has been successfully applied to explain the observed properties of multi-band gamma-ray bursts (GRBs) for many years. Here we report the spectral properties of the prompt emission of 21 BdHN bursts and their multi-wavelength afterglow properties.
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Yu Wang18/05/2022, 12:00
Binary driven hypernova (BdHN) models long gamma-ray bursts (GRBs) as occurring in the binary systems involving a carbon-oxygen core and a companion compact star. This model, first proposed in 2012, succeeds and improves upon the fireshell model and the induced gravitational collapse paradigm. After nearly a decade of development, the BdHN model has reached a nearly mature structure. In this...
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Gregory Vereshchagin (ICRANet)18/05/2022, 12:25
In astrophysics optically thick electron-positron plasma is a source of emission from compact objects. Attempts to create relativistic plasma are made in large projects such as ELI and XCELS. Short time-scales of variability and non-thermal spectra of observed radiation in astrophysical sources, as well as small spatial dimensions in laboratory experiments imply absence of equilibrium. We...
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