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Continuum spectra of collimated, ionized stellar winds
The behavior of well-collimated ionized flows is studied. The derivation and calculation of the opaque spectral index, collimation distance, mass-loss rate, and radio flux for an unresolved,
Supernova Remnants in the Sedov Expansion Phase: Thermal X-Ray Emission
Improved calculations of X-ray spectra for supernova remnants (SNRs) in the Sedov-Taylor phase are reported, which for the first time include reliable atomic data for Fe L-shell lines. This new set
Transition to the Radiative Phase in Supernova Remnants
The evolution of a supernova remnant through the transition from an adiabatic Sedov-Taylor blast wave to a radiative pressure-driven snowplow phase is studied using one- and two-dimensional
Supernova Remnants at High Energy
Many shell supernova remnants are now known to radiate synchrotron X-rays. Several objects have also been detected in TeV gamma rays. Nonthermal X-rays and gamma rays can be produced in shell
Systematic Spatial Variations of the Spectrum of Synchrotron X-rays from the Youngest Galactic Supernova Remnant G1.9+0.3
Our 50 ks Chandra observation of the small radio supernova remnant (SNR) G1.9+0.3 shows a complete shell structure with strong bilateral symmetry, about 100'' in diameter. The radio morphology is
Models of Synchrotron X-Rays from Shell Supernova Remnants
The diffusive shock acceleration process can accelerate particles to a maximum energy depending on the shock speed and age and on any competing loss processes on the particles. The shock waves of
Maximum Energies of Shock-accelerated Electrons in Young Shell Supernova Remnants
Young supernova remnants (SNRs) are often assumed to be the source of cosmic rays up to energies approaching the slight steepening in the cosmic-ray spectrum at around 1000 TeV, known as the knee. We
Evolution of pulsar-driven supernova remnants
Radio and X-ray observations of the growing class of Crab-line supernova remnants (''plerions'') suggest that a central pulsar dominates their evolution. We model a plerion as a spherical,
A VLA Study of the Expansion of Tycho's Supernova Remnant
We have measured the expansion of Tycho's supernova remnant (SNR) over a 10 yr interval by comparing new VLA observations at 1375 MHz made in 1994 and 1995 with previous observations made in 1983 and
We report the discovery of thermal X-ray emission from the youngest Galactic supernova remnant G1.9+0.3, from a 237 ks Chandra observation. We detect strong K? lines of Si, S, Ar, Ca, and Fe. In