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ON THE CLASSIFICATION OF GRBs AND THEIR OCCURRENCE RATES

Ruffini, R. ; Rueda, J. A. ; Muccino, M. ; Aimuratov, Y. ; Becerra, L. M. ; Bianco, C. L. ; Kovacevic, M. ; Moradi, R. ; Oliveira, F. G. ; Pisani, G. B. ; Wang, Y.

The Astrophysical journal, 2016-12, Vol.832 (2), p.136 [Periódico revisado por pares]

Philadelphia: The American Astronomical Society

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Título:
ON THE CLASSIFICATION OF GRBs AND THEIR OCCURRENCE RATES
Autor: Ruffini, R. ; Rueda, J. A. ; Muccino, M. ; Aimuratov, Y. ; Becerra, L. M. ; Bianco, C. L. ; Kovacevic, M. ; Moradi, R. ; Oliveira, F. G. ; Pisani, G. B. ; Wang, Y.
Assuntos: Accretion ; Astrophysics ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; binaries: general ; black hole physics ; BLACK HOLES ; CARBON MONOXIDE ; CLASSIFICATION ; Companion stars ; COSMIC GAMMA BURSTS ; Critical mass ; Deposition ; EMISSION ; EXPLOSIONS ; GAMMA RADIATION ; Gamma ray bursts ; Gamma ray flashes ; Gamma rays ; gamma-ray burst: general ; GEV RANGE ; GRAVITATIONAL COLLAPSE ; Hybrid systems ; KERR EFFECT ; NEUTRON STARS ; Oxygen ; Progenitors (astrophysics) ; stars: neutron ; Supernova ; SUPERNOVAE ; supernovae: general ; WHITE DWARF STARS ; white dwarfs ; X ray flashes ; X-RAY FLUORESCENCE ANALYSIS
É parte de: The Astrophysical journal, 2016-12, Vol.832 (2), p.136
Notas: High-Energy Phenomena and Fundamental Physics
ApJ101551
Descrição: ABSTRACT There is mounting evidence for the binary nature of the progenitors of gamma-ray bursts (GRBs). For a long GRB, the induced gravitational collapse paradigm proposes as progenitor, or "in-state," a tight binary system composed of a carbon-oxygen core (CO ) undergoing a supernova explosion that triggers hypercritical accretion onto a neutron star (NS) companion. For a short GRB (S-GRB), an NS-NS merger is traditionally adopted as the progenitor. We divide long and S-GRBs into two subclasses, depending on whether or not a black hole (BH) is formed in the merger or in the hypercritical accretion process exceeding the NS critical mass. For long bursts, when no BH is formed, we have the subclass of X-ray flashes (XRFs), with isotropic energy erg and rest-frame spectral peak energy . When a BH is formed, we have the subclass of binary-driven hypernovae (BdHNe), with erg and . In analogy, short bursts are similarly divided into two subclasses. When no BH is formed, short gamma-ray flashes (S-GRFs) occur, with erg and . When a BH is formed, the authentic S-GRBs occur, with erg and . We give examples and observational signatures of these four subclasses and their rate of occurrence. From their respective rates it is possible that "in-states" of S-GRFs and S-GRBs originate from the "out-states" of XRFs. We indicate two additional progenitor systems: white dwarf-NS and BH-NS. These systems have hybrid features between long and short bursts. In the case of S-GRBs and BdHNe evidence is given of the coincidence of the onset of the high-energy GeV emission with the birth of a Kerr BH.
Editor: Philadelphia: The American Astronomical Society
Idioma: Inglês

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ON THE CLASSIFICATION OF GRBs AND THEIR OCCURRENCE RATES

Ruffini, R. ; Rueda, J. A. ; Muccino, M. ; Aimuratov, Y. ; Becerra, L. M. ; Bianco, C. L. ; Kovacevic, M. ; Moradi, R. ; Oliveira, F. G. ; Pisani, G. B. ; Wang, Y.

Philadelphia: The American Astronomical Society

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