Browsing by Author "Filippi, S."

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    On the role of ionic modeling on the signature of cardiac arrhythmias for healthy and diseased hearts
    (2020) Ramírez Benítez, William Alberto; Gizzi, A.; Sack, K. L.; Filippi, S.; Guccione, J. M.; Hurtado Sepúlveda, Daniel
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    The morphology of the X-ray afterglows and of the jetted GeV emission in long GRBs
    (2021) Ruffini, R.; Moradi, R.; Rueda, J. A.; Li, L.; Sahakyan, N.; Chen, Y-C; Wang, Y.; Aimuratov, Y.; Becerra, L.; Bianco, C. L.; Cherubini, C.; Filippi, S.; Karlica, M.; Mathews, G. J.; Muccino, M.; Pisani, G. B.; Xue, S. S.
    We recall evidence that long gamma-ray bursts (GRBs) have binary progenitors and give new examples. Binary-driven hypernovae (BdHNe) consist of a carbon-oxygen core (COcore) and a neutron star (NS) companion. For binary periods similar to 5 min, the COcore collapse originates the subclass BdHN I characterized by (1) an outstanding supernova (SN; the 'SN-rise'); (2) a black hole (BH), born from the NS collapse by SN matter accretion, leading to a GeV emission with luminosity L-GeV = A(GeV) t(-alpha GeV), observed only in some cases; and (3) a new NS (nu NS), born from the SN, originating from the X-ray afterglow with L-X = A(X) t(-alpha X), observed in all BdHN I. We record 378 sources and present for four prototype GRBs 130427A, 160509A, 180720B, and 190114C: (1) spectra, luminosities, SN-rise duration; (2) A(GeV), alpha(GeV) = 1.48 +/- 0.32, and (3) the vNS spin time evolution. We infer (i) A(GeV), alpha(GeV) = 1.19 +/- 0.04 and (ii) the BdHN I morphology from time-resolved spectral analysis, three-dimensional simulations, and the GeV emission presence/absence in 54 sources within the Fermi-Large Area Telescope boresight angle. For 25 sources, we give the integrated and time-varying GeV emission, 29 sources have no GeV emission detected and show X/gamma-ray flares previously inferred as observed along the binary plane. The 25/54 ratio implies the GeV radiation is emitted within a cone of half-opening angle approximate to 60 degrees from the normal to the orbital plane. We deduce BH masses of 2.3-8.9 M-circle dot and spin of 0.27-0.87 by explaining the GeV emission from the BH rotational energy extraction, while their time evolution validates the BH mass-energy formula.