Areas of Interest
I study the production of energetic particles in shock waves in a variety of astrophysical sites. The most famous superthermal particles in
astrophysics are Galactic Cosmic Rays, and the highest energy cosmic rays, which originate beyond the Milky Way Galaxy, are the highest energy
particles ever observed. The sources for these Ultra-High-Energy Cosmic Rays must be extreme objects like gamma-ray bursts, radio jets, or accreting
supermassive black holes.
The remnants of supernova explosions are the most likely sources within the Milky Way of lower energy cosmic rays. In supernova remnants, a strong
blastwave is believed to produce cosmic rays via the Diffusive Shock Acceleration mechanism. Shock acceleration is highly efficient and nonlinear and
most of my work involves modeling this mechanism with computer simulations. The relativistic electrons and ions that are accelerated in the remnant
produce radiation across the spectrum from radio to gamma-rays and this radiation is observed by space-based and ground-based telescopes.
Recent and Selected Publications
"Efficient Cosmic Ray Acceleration, Hydrodynamics, and Self-Consistent Thermal X-Ray Emission Applied to Supernova Remnant RX J1713.7-3946,"
Ellison, Patnaude, Slane & Raymond, 2010, ApJ, 712, 287 link to paper
"Spectra of Magnetic Fluctuations and Relativistic Particles Produced by a Nonresonant Wave Instability in Supernova Remnant Shocks," Vladimirov,
Bykov & Ellison, 2009, 703, L29 link to paper
"The Role of Diffusive Shock Acceleration on Nonequilibrium Ionization in Supernova Remnants," Patnaude, Ellison & Slane, 2009, ApJ, 696, 1956 link to paper
"Dots, Clumps, and Filaments: The Intermittent Images of Synchrotron Emission in Random Magnetic Fields of Young Supernova Remnants," Bykov,
Uvarov & Ellison, 2008, 689, L133 link to paper
"Turbulence Dissipation and Particle Injection in Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification," Vladimirov, Bykov &
Ellison, 2008, 688, 1084 link to paper
"Three-dimensional Model of Broadband Emission from Supernova Remnants Undergoing Nonlinear Diffusive Shock Acceleration," Lee, Kamae & Ellison,
2008, ApJ, 686, 325 link to paper
"Magnetic Field Amplification and Rapid Time Variations in SNR RX J1713.7-3946," Ellison & Vladimirov, 2008, ApJ, 673, L47 link to paper
"Particle Acceleration in Supernova Remnants and the Production of Thermal and Nonthermal Radiation," Ellison, Patnaude, Slane, Blasi & Gabici,
2007, ApJ, 661, 879 link to paper
"Nonlinear Diffusive Shock Acceleration with Magnetic Field Amplification," Vladimirov, Ellison & Bykov, 2006, ApJ, 652, 1246 link to paper
"Radio and X-Ray Profiles in Supernova Remnants Undergoing Efficient Cosmic-Ray Production," Ellison & Cassam-Chenaļ, 2005, ApJ, 632, 920 link to paper
"Nonlinear particle acceleration at reverse shocks in supernova remnants," Ellison, Decourchelle & Ballet, 2005, A&A, 429, 569 link to paper
"Diffusive shock acceleration in unmodified relativistic, oblique shocks," Ellison & Double, 2004, Astroparticle Physics, 22, 323 link to paper
"Nonlinear particle acceleration in relativistic shocks," Ellison & Double, 2002, Astroparticle Physics, 18, 213 link to paper
"Rayleigh-Taylor Instabilities in Young Supernova Remnants Undergoing Efficient Particle Acceleration," Blondin & Ellison, 2001, ApJ, 560, 244 link to paper
"Nonlinear Shock Acceleration and Photon Emission in Supernova Remnants," Ellison, Berezhko & Baring, 2000, ApJ, 540, 292 link to paper
"Thermal X-Ray Emission and Cosmic-Ray Production in Young Supernova Remnants," Decourchelle, Ellison & Ballet, 2000, ApJ, 543, L57 link to paper
"A Simple Model of Nonlinear Diffusive Shock Acceleration," Berezhko & Ellison, 1999, ApJ, 526, 385 link to paper
"Galactic Cosmic Rays from Supernova Remnants. II. Shock Acceleration of Gas and Dust," Ellison, Drury & Meyer, 1997, ApJ, 487, 197 link to paper
"Galactic Cosmic Rays from Supernova Remnants. I. A Cosmic-Ray Composition Controlled by Volatility and Mass-to-Charge Ratio," Meyer, Drury &
Ellison, 1997, ApJ, 487, 182 link to paper
"Acceleration of Solar Wind Ions by Nearby Interplanetary Shocks: Comparison of Monte Carlo Simulations with ULYSSES Observations," Baring,
Ogilvie, Ellison & Forsyth, 1997, ApJ, 476, 889 link to paper
"Nonlinear Particle Acceleration in Oblique Shocks," Ellison, Baring & Jones, 1996, ApJ, 473, 1029 link to paper
"Investigation of intrinsic variability in one-dimensional parallel shocks using steady state hybrid simulations," Bennett & Ellison, 1995, JGR,
100, 3439 link to paper
"Electron acceleration in Tycho's and Kepler's supernova remnants - Spectral evidence of Fermi shock acceleration," Reynolds & Ellison, 1992, 399,
L75 link to paper
"The plasma physics of shock acceleration," Jones & Ellison, 1991, Space Sci. Revs., 58, 259 link to paper
"First-order Fermi particle acceleration by relativistic shocks," Ellison, Reynolds & Jones, 1990, ApJ, 360, 702 link to paper
"Particle injection and acceleration at earth's bow shock - Comparison of upstream and downstream events," Ellison, Moebius & Paschmann, 1990,
ApJ, 352, 376 link to paper
"Shock acceleration of electrons and ions in solar flares," Ellison & Ramaty, 1985, ApJ, 298, 400 link to paper
"Relativistic cosmic-ray spectra in the fully nonlinear theory of shock acceleration," Ellison & Eichler, 1985, PRL, 55, 2735 link to paper
"Monte Carlo shock-like solutions to the Boltzmann equation with collective scattering," Ellison & Eichler, 1984, ApJ, 286, 691 link to paper
"Monte Carlo Simulation of Collisionless Shocks Showing Preferential Acceleration of High A/Z Particles,"[PDF] Ellison, D.C., Jones, F.C. and
Eichler, D., 1981, J. Geophys. (Zeitschrift Geophysik), Vol. 50, pages 110-113 link to paper
|
