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Record Details

Record 18 of 272
Radiation from Relativistic Shocks with Turbulent Magnetic Fields
Author and Affiliation:
Nishkawa, K.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Medvedev, M.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Zhang, B.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Hardee, P.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Niemiec, J.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Mizuno, A.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Nordlund, A.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Frederiksen, J.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Sol, H.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Pohl, M.(NASA Marshall Space Flight Center, Huntsville, AL, United States) Show more authors
Abstract: Recent PIC simulations of relativistic electron-positron (electron-ion) jets injected into a stationary medium show that particle acceleration occurs at shocked region. 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 electron's transverse deflection behind the shock. The "jitter" radiation from deflected electrons in turbulent magnetic fields has different properties than synchrotron radiation which is calculated in 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. New recent calculation of spectra with various different Lorentz factors of jets (two electrons) and initial magnetic fields. New spectra based on small simulations will be presented.
Publication Date: Mar 30, 2009
Document ID:
20090025873
(Acquired Jul 15, 2009)
Subject Category: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Report/Patent Number: M09-0296
Document Type: Conference Paper
Meeting Information: Frontier of Space Astrophysics: Gamma Ray Bursts and Neutron Stars; 30 Mar. - 4 Apr. 2009; Cairo, Alexandria; Egypt
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: MAGNETIC FIELDS; SYNCHROTRON RADIATION; TURBULENCE; RELATIVISTIC PARTICLES; ASTROPHYSICS; ELECTRON-POSITRON PLASMAS; NONUNIFORM MAGNETIC FIELDS; SUPERNOVA REMNANTS; VIBRATION; PARTICLE ACCELERATION; GAMMA RAY BURSTS; WEIBEL INSTABILITY
Availability Source: Other Sources
Availability Notes: Abstract Only
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