On a GRB afterglow model consistent with hypernovae observations

Abstract

We describe the afterglows of the long gamma-ray-burst (GRB) 130427A within the context of a binary-driven hypernova (BdHN). The afterglows originate from the interaction between a newly born neutron star ($\nu$NS), created by an Ic supernova (SN), and a mildly relativistic ejecta of a hypernova (HN). Such a HN in turn results from the impact of the GRB on the original SN Ic. The mildly relativistic expansion velocity of the afterglow ($\Gamma \sim 3$) is determined, using our model independent approach, from the thermal emission between $196$~s and $461$~s. The power-law in the optical and X-ray bands of the afterglow is shown to arise from the synchrotron emission of relativistic electrons in the expanding magnetized HN ejecta. Two components contribute to the injected energy: the kinetic energy of the mildly relativistic expanding HN and the rotational energy of the fast rotating highly magnetized $\nu$NS. We reproduce the afterglow in all wavelengths from the optical ($10^{14}$~Hz) to the X-ray band ($10^{19}$~Hz) over times from $604$~s to $5.18\times 10^6$~s relative to the Fermi-GBM trigger. Initially, the emission is dominated by the loss of kinetic energy of the HN component. After $10^5$~s the emission is dominated by the loss of rotational energy of the $\nu$NS, for which we adopt an initial rotation period of $2$~ms and a dipole plus quadrupole magnetic field of $\lesssim 7\times 10^{12}$~G or $\sim 10^{14}$~G. This scenario with a progenitor composed of a CO${}_{\mathrm{core}}$ and a NS companion differs from the traditional ultra-relativistic-jetted treatments of the afterglows originating from a single black hole.

Accepted by ApJ on October 21st, 2018

References in corpus (10)

• The Supernova -- Gamma-Ray Burst Connection
• The Physics of Gamma-Ray Bursts and Relativistic Jets
• An online repository of Swift/XRT light curves of GRBs
• A new method of determining the initial size and Lorentz factor of gamma-ray burst fireballs using a thermal emission component
• Hypercritical Accretion, Induced Gravitational Collapse, and Binary-Driven Hypernovae
• Multipolar electromagnetic fields around neutron stars: exact vacuum solutions and related properties
• Early X-ray Flares in GRBs
• On Binary Driven Hypernovae and their nested late X-ray emission
• GRB 130427A and SN 2013cq: A Multi-wavelength Analysis of An Induced Gravitational Collapse Event
• Novel distance indicator for gamma-ray bursts associated with supernovae

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• Magnetic Fields and Afterglows of BdHNe: Inferences from GRB 130427A, GRB 160509A, GRB 160625B, GRB 180728A and GRB 190114C
• The newborn black hole in GRB 191014C proves that it is alive
• The morphology of the X-ray afterglows and of the jetted GeV emission in long GRBs
• Nature of the ultrarelativistic prompt emission phase of GRB 190114C
• GRB-SN Association within the Binary-Driven Hypernova Model
• Induced Gravitational Collapse, Binary-Driven Hypernovae, Long Gramma-ray Bursts and Their Connection with Short Gamma-ray Bursts
• GRB 190829A -- A Showcase of Binary Late Evolution
• The structure of the ultrarelativistic prompt emission phase and the properties of the black hole in GRB 180720B
• On the X-ray, optical and radio afterglows of the BdHN I GRB 180720B generated by the synchrotron emission
• The first minutes of a binary-driven hypernova
• GRB 171205A: Hypernova and Newborn Neutron Star
• Evidence for the transition of a Jacobi ellipsoid into a Maclaurin spheroid in gamma-ray bursts
• A Brief Review of Binary Driven Hypernova
• Neutrino oscillations in a neutrino-dominated accretion disk around a Kerr BH
• The white dwarf binary merger model of GRB 170817A
• Self-Similarities and Power-laws in the Time-resolved Spectra of GRB 190114C, GRB 130427A, GRB 160509A, and GRB 160625B
• The Quantum Emission of an Alive Black Hole
• Probing electromagnetic-gravitational wave emission coincidence in type I binary-driven hypernova family of long GRBs at very-high redshift
• Multimessenger signatures of a deformed magnetar in gamma-ray bursts
• MeV, GeV and TeV neutrinos from binary-driven hypernovae