Analysis of the GRB 081024B

Abstract : Recently we proposed the existence of two families of short GRBs, both originating from neutron star mergers: family-1 short bursts with Eiso < 1052 erg and rest-frame spectral peak energy Epeak < 2 MeV, leading to a massive neutron star as the merged core; family-2 short bursts with Eiso > 1052 erg and Epeak > 2 MeV, leading to a black hole as merged core. After the identification of the prototype GRB 090227B and GRB 140619B, we present the results of the analysis of GRB 081024B within the theoretical fireshell model. The presence of a short-lived high energy emission, which is expected to originate from the newly-born black hole, thus places this GRB 081024B among the family-2 short GRBs. From the detailed analysis we derived the redshift of the source z = 2.56 ± 1.63, its isotropic energy Eiso = (1.38 ± 0.78) × 1052 erg, and baryon load B = (5.885 ± 0.42) × 10−5. These values are consistent with the ones found in GRBs 090227B, 090510 and 140619B.
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.2975-2980, 2017, 〈10.1142/9789813226609_0374〉
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https://hal.archives-ouvertes.fr/hal-01669601
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Soumis le : mercredi 20 décembre 2017 - 23:42:21
Dernière modification le : mercredi 12 décembre 2018 - 09:17:36

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Yerlan Aimuratov, Remo Ruffini, Carlo Bianco, Maxime Enderli, Luca Izzo, et al.. Analysis of the GRB 081024B. 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. 3, pp.2975-2980, 2017, 〈10.1142/9789813226609_0374〉. 〈hal-01669601〉

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