scholarly journals General Relativistic MHD Simulations of the Gravitational Collapse of a Rotating Star with Magnetic Field as a Model of Gamma-Ray Bursts

2004 ◽  
Author(s):  
Y. Mizuno
Keyword(s):  
Magnetic Field ◽  
Gravitational Collapse ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Mhd Simulations ◽  
General Relativistic ◽  
Rotating Star

scholarly journals Neutrino Oscillations within the Induced Gravitational Collapse Paradigm of Long Gamma-Ray Bursts

2018 ◽  
Vol 852 (2) ◽  
pp. 120 ◽  
Author(s):  
L. Becerra ◽  
M. M. Guzzo ◽  
F. Rossi-Torres ◽  
J. A. Rueda ◽  
R. Ruffini ◽  
...  
Keyword(s):  
Gravitational Collapse ◽  
Neutrino Oscillations ◽  
Gamma Ray ◽  
Gamma Ray Bursts

scholarly journals SPH Simulations of the Induced Gravitational Collapse Scenario of Long Gamma-Ray Bursts Associated with Supernovae

2019 ◽  
Vol 871 (1) ◽  
pp. 14 ◽  
Author(s):  
L. Becerra ◽  
C. L. Ellinger ◽  
C. L. Fryer ◽  
J. A. Rueda ◽  
R. Ruffini
Keyword(s):  
Gravitational Collapse ◽  
Gamma Ray ◽  
Gamma Ray Bursts

scholarly journals PARTICLE ACCELERATION, MAGNETIC FIELD GENERATION, AND ASSOCIATED EMISSION IN COLLISIONLESS RELATIVISTIC JETS

2008 ◽  
Vol 17 (10) ◽  
pp. 1761-1767 ◽  
Author(s):  
K.-I. NISHIKAWA ◽  
Y. MIZUNO ◽  
G. J. FISHMAN ◽  
P. HARDEE
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Small Scale ◽  
Spectral Structure ◽  
Relativistic Jets ◽  
Weibel Instability ◽  
Electron Positron ◽  
Jitter Radiation

Nonthermal radiation observed from astrophysical systems containing relativistic jets and shocks, e.g., active galactic nuclei (AGNs), gamma-ray bursts (GRBs), and galactic microquasar systems usually have power-law emission spectra. Recent PIC simulations using injected relativistic electron-ion (electron-positron) jets show that acceleration occurs within the downstream jet. Shock acceleration is an ubiquitous phenomenon in astrophysical plasmas. Plasma waves and their associated instabilities (e.g., the Buneman instability, other two-streaming instability, and the Weibel instability) created in the shocks are responsible for particle (electron, positron, and ion) acceleration. The simulation results show that the Weibel instability is responsible for generating and amplifying highly nonuniform, small-scale magnetic fields. These magnetic fields contribute to the electrons' transverse deflection behind the jet head. The "jitter" radiation from deflected electrons has different properties to synchrotron radiation which assumes a uniform magnetic field. This jitter radiation may be important to understanding the complex time evolution and/or spectral structure in gamma-ray bursts, relativistic jets, and supernova remnants.

scholarly journals ON THE INDUCED GRAVITATIONAL COLLAPSE SCENARIO OF GAMMA-RAY BURSTS ASSOCIATED WITH SUPERNOVAE

2016 ◽  
Vol 833 (1) ◽  
pp. 107 ◽  
Author(s):  
L. Becerra ◽  
C. L. Bianco ◽  
C. L. Fryer ◽  
J. A. Rueda ◽  
R. Ruffini
Keyword(s):  
Gravitational Collapse ◽  
Gamma Ray ◽  
Gamma Ray Bursts

scholarly journals Afterglow light curves from magnetized GRB flows

2010 ◽  
Vol 6 (S275) ◽  
pp. 358-362
Author(s):  
Petar Mimica ◽  
Dimitrios Giannios ◽  
Miguel Ángel Aloy
Keyword(s):  
Magnetic Field ◽  
Radiative Transfer ◽  
Gamma Ray ◽  
Gamma Ray Bursts ◽  
Light Curves ◽  
Reverse Shock ◽  
The Magnetic Field

AbstractUsing the RMHD code MRGENESIS and the radiative transfer code SPEV we compute multiwavelength afterglow light curves of magnetized ejecta of gamma-ray bursts interacting with a uniform circumburst medium. We are interested in the emission from the reverse shock when ejecta magnetization varies from σ0 = 0 to σ0 = 1. For typical parameters of the ejecta, the emission from the reverse shock peaks for magnetization σ0 ~ 0.01 − 0.1, and is suppressed for higher σ0. We fit the early afterglow light curves of GRB 990123 and 090102 and discuss the possible magnetization of the outflows of these bursts. Finally we discuss the amount energy left in the magnetic field which is available for dissipation at later afterglow stages.

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