Zobrazeno 1 - 10
of 203
pro vyhledávání: '"Ellison, Donald C"'
Publikováno v:
Phys.Rev.D, 110 (2024) 023041
We show here that highly polarized X-ray synchrotron radiation from young supernova remnants (SNRs) can be modeled within the framework of diffusive shock acceleration (DSA) and nonlinear magnetic turbulence generation.Cosmic ray acceleration by SNR
Externí odkaz:
http://arxiv.org/abs/2407.04160
Publikováno v:
The Astrophysical Journal, v. 899, Issue 2, id.142, (2020)
Observations of young supernova remnants (SNRs) in X-rays and gamma-rays have provided conclusive evidence for particle acceleration to at least TeV energies. Analysis of high spatial resolution X-ray maps of young SNRs has indicated that the particl
Externí odkaz:
http://arxiv.org/abs/2007.12921
Publikováno v:
2019 J. Phys.: Conf. Ser. 1400 022011
For most elements, the isotopic ratios seen in cosmic rays (CRs) are similar to those in the solar wind. The most important exception to this is $^{22}$Ne/$^{20}$Ne where the CR value is $\sim 5$ times that of the solar wind. According to most recent
Externí odkaz:
http://arxiv.org/abs/1910.08602
Relativistic particle acceleration in collisionless shocks of supernova remnants is accompanied by magnetic field amplification from cosmic ray (CR) driven plasma instabilities. Bell's fast CR-current instability is predicted to produce turbulence wi
Externí odkaz:
http://arxiv.org/abs/1905.10266
Autor:
Patnaude, Daniel J., Lee, Shiu-Hang, Slane, Patrick O., Badenes, Carles, Nagataki, Shigehiro, Ellison, Donald C., Milisavljevic, Dan
There is now substantial evidence that the progenitors of some core-collapse supernovae undergo enhanced or extreme mass loss prior to explosion. The imprint of this mass loss is observed in the spectra and dynamics of the expanding blastwave on time
Externí odkaz:
http://arxiv.org/abs/1708.04984
Publikováno v:
Phys. Rev. E 95, 033207 (2017)
Fast collisionless shocks in cosmic plasmas convert their kinetic energy flow into the hot downstream thermal plasma with a substantial fraction of energy going into a broad spectrum of superthermal charged particles and magnetic fluctuations. The su
Externí odkaz:
http://arxiv.org/abs/1703.01160
The standard model for GRB afterglow emission treats the accelerated electron population as a simple power law, $N(E) \propto E^{-p}$ for $p \gtrsim 2$. However, in standard Fermi shock acceleration a substantial fraction of the swept-up particles do
Externí odkaz:
http://arxiv.org/abs/1701.04170
We include a general form for the scattering mean free path in a nonlinear Monte Carlo model of relativistic shock formation and Fermi acceleration. Particle-in-cell (PIC) simulations, as well as analytic work, suggest that relativistic shocks tend t
Externí odkaz:
http://arxiv.org/abs/1512.02901
We have modeled the simultaneous first-order Fermi shock acceleration of protons, electrons, and helium nuclei by relativistic shocks. By parameterizing the particle diffusion, our steady-state Monte Carlo simulation allows us to follow particles fro
Externí odkaz:
http://arxiv.org/abs/1506.03087
Autor:
Lee, Shiu-Hang, Patnaude, Daniel J., Raymond, John C., Nagataki, Shigehiro, Slane, Patrick O., Ellison, Donald C.
Recent observations by the Large Area Telescope (LAT) onboard the Fermi satellite have revealed bright gamma-ray emission from middle-aged supernova remnants (SNRs) inside our Galaxy. These remnants, which also possess bright non-thermal radio shells
Externí odkaz:
http://arxiv.org/abs/1504.05313