9 papers · 1 filter
Three-dimensional modeling of the asymmetric blast wave from the 2006 outburst of RS Ophiuchi: Early X-ray emission
S. Orlando, J. J. Drake, J. M. Laming
Chandra/HETG observations of the recurrent nova RS Ophiuchi at day 13.9 of its 2006 outburst reveal a spectrum covering a large range in plasma temperature and characterized by asy…
The Heating of Thermal Electrons in Fast Collisionless Shocks: The Integral Role of Cosmic Rays
Cara E. Rakowski, J. Martin Laming, Parviz Ghavamian
Understanding the heating of electrons to quasi-thermal energies at collisionless shocks has broad implications for plasma astrophysics. It directly impacts the interpretation of X…
Non-Maxwellian Proton Velocity Distributions in Nonradiative Shocks
J. C. Raymond, Philip A. Isenberg, J. M. Laming
The Balmer line profiles of nonradiative supernova remnant shocks provide the means to measure the post-shock proton velocity distribution. While most analyses assume a Maxwellian…
A Deep Chandra Observation of Kepler's Supernova Remnant: A Type Ia Event with Circumstellar Interaction
S. P. Reynolds, K. J. Borkowski, U. Hwang +4
We present initial results of a 750 ks Chandra observation of the remnant of Kepler's supernova of AD 1604. The strength and prominence of iron emission, together with the absence…
A Physical Relationship Between Electron-Proton Temperature Equilibration and Mach Number in Fast Collisionless Shocks
Parviz Ghavamian, J. Martin Laming, Cara E. Rakowski
The analysis of Balmer-dominated optical spectra from non-radiative (adiabatic) SNRs has shown that the ratio of the electron to proton temperature temperature at the blast wave is…
Collisional Ionization Equilibrium for Optically Thin Plasmas. I. Updated Recombination Rate Coefficients for Bare though Sodium-like Ions
P. Bryans, N. R. Badnell, T. W. Gorczyca +3
Reliably interpreting spectra from electron-ionized cosmic plasmas requires accurate ionization balance calculations for the plasma in question. However, much of the atomic data ne…