2021MNRAS.504.5301R -
Mon. Not. R. Astron. Soc., 504, 5301-5326 (2021/July-2)
The morphology of the X-ray afterglows and of the jetted GeV emission in long GRBs.
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. and XUE S.S.
Abstract (from CDS):
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 ∼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 LGeV = AGeV t–\alphaGeV, observed only in some cases; and (3) a new NS (νNS), born from the SN, originating from the X-ray afterglow with LX = AX t–αX_^, 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) AX, αX = 1.48 ± 0.32, and (3) the νNS spin time evolution. We infer (i) AGeV, αGeV = 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 ≃60° from the normal to the orbital plane. We deduce BH masses of 2.3-8.9 M☉ 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.
Abstract Copyright:
© 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
Journal keyword(s):
black hole physics - binaries: general - gamma-ray bursts - transients: supernovae
Simbad objects:
71
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