Origin of Ultra-High Energy Cosmic Rays: Nuclear Composition of Gamma-ray Burst Jets

2011 ◽  
Author(s):  
Sanshiro Shibata ◽  
Nozomu Tominaga ◽  
Hiroyuki Sagawa ◽  
Yoshiya Kawasaki ◽  
Takashi Sako ◽  
...  
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Gamma Ray Burst ◽  
High Energy Cosmic Rays ◽  
Nuclear Composition

scholarly journals Origin of Ultra-High Energy Cosmic Rays: Nuclear Composition of Gamma-Ray Burst Jets

2011 ◽  
Vol 7 (S279) ◽  
pp. 389-390
Author(s):  
Sanshiro Shibata ◽  
Nozomu Tominaga
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Ultra High Energy ◽  
Heavy Nuclei ◽  
Gamma Ray Burst ◽  
High Energy Cosmic Rays ◽  
Relativistic Jet ◽  
Launch Site ◽  
Nuclear Composition

AbstractUltra-high energy cosmic rays (UHECRs) are the most energetic particles flying from space and their source is not clarified yet. Recently, the Pierre Auger Observatory (PAO) suggests that UHECRs involve heavy nuclei. The PAO results require that a considerable fraction of metal nuclei must exist in the accelerating site, which can be realized only in the stellar interior. This puts strong constraints on the origin of UHECRs. In order to definitize the constraints from PAO results, we investigate the fraction of metal nuclei in a relativistic jet in gamma-ray burst associated with core-collapse supernova. If the jet is initially dominated by radiation field, quasi-statistical equilibrium (QSE) is established and heavy nuclei are dissociated to light particles such as 4He during the acceleration and expansion. On the other hand, if the jet is mainly accelerated by magnetic field heavy or intermediate mass nuclei can survive. The criterion to contain the metal nuclei is that the temperature at the launch site is below 4.5 × 109K. Therefore, if the composition of UHECRs is dominated by metal nuclei, a GRB with the magnetized jet is the most plausible candidate of the accelerating site.

scholarly journals GAMMA-RAY BURST DETECTION WITH ICECUBE

2009 ◽  
Vol 18 (10) ◽  
pp. 1561-1565
Author(s):  
◽  
ALEXANDER KAPPES
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
Gamma Ray Burst ◽  
Considerable Fraction ◽  
High Energy Cosmic Rays ◽  
Narrow Emission

With their narrow emission window gamma-ray bursts (GRBs) are among the most promising objects for the first identification of high-energy cosmic neutrinos. If a considerable fraction of the ultra-high energy cosmic rays is indeed produced in GRBs, IceCube, which is now more than half-way completed, should be able to detect the associated neutrinos in the next few years. Furthermore, optical follow-up observations of neutrino multiplets will enhance IceCube's sensitivity to choked GRBs which do not produce a gamma-ray signal.

scholarly journals Are gamma-ray bursts the sources of ultra-high energy cosmic rays?

2015 ◽  
Vol 62 ◽  
pp. 66-91 ◽  
Author(s):  
Philipp Baerwald ◽  
Mauricio Bustamante ◽  
Walter Winter
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays

scholarly journals The problematic connection between low-luminosity gamma-ray bursts and ultra-high-energy cosmic rays

2021 ◽  
Author(s):  
Filip Samuelsson ◽  
Damien Begue ◽  
Felix Ryde ◽  
Asaf Pe'er ◽  
Kohta Murase
Keyword(s):  
Cosmic Rays ◽  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Bursts ◽  
Ultra High Energy ◽  
High Energy Cosmic Rays
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