GRB 140619B: A short GRB from a binary neutron star merger leading to black hole formation

Abstract : For short gamma-ray bursts (GRBs), double neutron star (NS) mergers are traditionally adopted as progenitors. We propose a classification of short bursts into two sub-classes: short gamma-ray flashes (S-GRFs) with isotropic energy Eiso ≲ 1052 erg and rest-frame spectral peak energy Ep,i ≲ 2 MeV, when the merger leads to a very massive NS (MNS), and the authentic short GRBs (S-GRBs) with Eiso ≳ 1052 erg and Ep,i ≳ 2 MeV, when a black hole (BH) is formed. Evidences for the BH formation in S-GRBs are provided by the observed high energy 0.1–100 GeV emission after the GRB emission from the e+e-plasma transparency (P-GRB); in S-GRFs, leading to MNS, this emission is never observed. Both these sub-classes fulfill the Ep,i–Eiso relation for short GRBs. We present here the recently identified S-GRB 140619B. From the spectral analysis of the early ∼ 0.2 s, we infer an observed P-GRB temperature kT = (324 ± 33) keV, a theoretically derived redshift z = 2.67 ± 0.37, a total burst energy erg, and a baryon load B = (5.52 ± 0.73) × 10−5. We also estimate the emission of gravitational waves (GWs) of the progenitor NS–NS merger. Including all the S-GRBs so far identified, the observed rate of these sources is
Keywords : Gamma-ray burst
Type de document :
Communication dans un congrès
14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2969-2974, 2017, 〈10.1142/9789813226609_0373〉
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https://hal.archives-ouvertes.fr/hal-01669600
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Soumis le : mercredi 20 décembre 2017 - 23:42:19
Dernière modification le : mercredi 12 décembre 2018 - 09:17:34

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Marco Muccino, R. Ruffini, Milos Kovacevic, Fernanda Oliveira, Jorge Rueda, et al.. GRB 140619B: A short GRB from a binary neutron star merger leading to black hole formation. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2969-2974, 2017, 〈10.1142/9789813226609_0373〉. 〈hal-01669600〉

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