2018
DOI: 10.3847/1538-4357/aa9e8b
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Early X-Ray Flares in GRBs

Abstract: We analyze the early X-ray flares in the GRB "flare-plateau-afterglow" (FPA) phase observed by Swift-XRT. The FPA occurs only in one of the seven GRB subclasses: the binary-driven hypernovae (BdHNe). This subclass consists of long GRBs with a carbon-oxygen core and a neutron star (NS) binary companion as progenitors. The hypercritical accretion of the supernova (SN) ejecta onto the NS can lead to the gravitational collapse of the NS into a black hole. Consequently, one can observe a GRB emission with isotropic… Show more

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Cited by 58 publications
(125 citation statements)
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References 145 publications
(251 reference statements)
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“…Acuner & Ryde (2018) employed the Gaussian mixture model to analyze Fermi GRBs in a different fivedimensional space of the Band et al (1993) spectral parameters (α, β, E peak ), the duration T 90 and the fluence, and also claimed evidence for five groups. For completeness, it should be noted that Ruffini et al (2018) specified seven GRB classes.…”
Section: Introductionmentioning
confidence: 99%
“…Acuner & Ryde (2018) employed the Gaussian mixture model to analyze Fermi GRBs in a different fivedimensional space of the Band et al (1993) spectral parameters (α, β, E peak ), the duration T 90 and the fluence, and also claimed evidence for five groups. For completeness, it should be noted that Ruffini et al (2018) specified seven GRB classes.…”
Section: Introductionmentioning
confidence: 99%
“…The SN shock breakout and the hypercritical accretion can be observed as X-ray precursors [52]. The e + e − feedback onto the SN ejecta also produces gamma-and X-ray flares observed in the early afterglow [40]. The synchrotron emission by relativistic electrons from the νNS in the expanding magnetized HN ejecta and the νNS pulsar emission explain the early and late X-ray afterglow [91].…”
Section: The Specific Case Of Bdhnementioning
confidence: 98%
“…It was recently addressed in [40] the role of X-ray flares as a powerful tool to differentiate the BdHN model from the "collapsar-fireball" model [114].…”
Section: Early X-ray Afterglow: Flaresmentioning
confidence: 99%
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