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Collisional Plasma Models with APEC/APED: Emission-Line Diagnostics of Hydrogen-like and Helium-like Ions
New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogen- and helium-like ions are usually strong features. We present results from aExpand
Soft X-ray spectrum of a hot plasma.
The spectrum of radiation emitted by a hot optically thin plasma with abundances and equilibrium ionization balance appropriate to interstellar conditions has been calculated. The results atExpand
Iron ionization and recombination rates and ionization equilibrium
In the past few years important progress has been made on the knowledge of ionization and recombination rates of iron, an astrophysically abundant heavy element and a major impurity in laboratoryExpand
Radiative Bow Shock Models of Herbig-Haro Objects
The bow-shock models of HH objects presently constructed from a collection of 43 radiative-planar-shock models are used to predict the line ratios and line profiles expected from HH objects. It isExpand
The Expansion Asymmetry and Age of the Cassiopeia A Supernova Remnant
HST images of the young supernova remnant Cas A are used to explore the expansion and spatial distribution of its highest velocity debris. ACS WFC images taken in 2004 March and December with SloanExpand
The magnetic nature of disk accretion onto black holes
It is reported that an X-ray-absorbing wind discovered in an observation of the stellar-mass black hole binary GRO J1655 - 40 must be powered by a magnetic process that can also drive accretion through the disk, demonstrating that disk accretion onto black holes is a fundamentally magnetic process. Expand
Mass-loss rates, ionization fractions, shock velocities, and magnetic fields of stellar jets
In this paper we calculate emission-line ratios from a series of planar radiative shock models that cover a wide range of shock velocities, preshock densities, and magnetic fields. The models coverExpand
X-ray emission from cataclysmic variables with accretion disks. I - Hard X-rays. II - EUV/soft X-ray radiation
Theoretical models explaining the hard-X-ray, soft-X-ray, and EUV emission of accretion-disk cataclysmic variables in terms of the disk boundary layer (DBL) are developed on the basis of a survey ofExpand
Simultaneous Chandra and RXTE Spectroscopy of the Microquasar H1743–322: Clues to Disk Wind and Jet Formation from a Variable Ionized Outflow
We observed the bright phase of the 2003 outburst of the Galactic black hole candidate H1743-322 in X-rays simultaneously with Chandra and RXTE on four occasions. The Chandra HETGS spectra revealExpand
Shock waves in the interstellar medium
Calculations of the optical and UV emission-line intensities and column densities of ions observable in the optical and UV are presented for plane-parallel, steady-state shock waves in theExpand