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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
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Detection of an unidentified emission line in the stacked X-ray spectrum of galaxy clusters
We detect a weak unidentified emission line at E = (3.55-3.57) ± 0.03 keV in a stacked XMM-Newton spectrum of 73 galaxy clusters spanning a redshift range 0.01-0.35. When the full sample is dividedExpand
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Ionization Equilibrium Timescales in Collisional Plasmas
Astrophysical shocks or bursts from a photoionizing source can disturb the typical collisional plasma found in galactic interstellar media or the intergalactic medium. The spectrum emitted by thisExpand
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Soft X-Ray Scattering and Halos from Dust
Small-angle scatterings of X-rays by interstellar dust particles create halos around X-ray sources. The halo intensity and its projected radial distribution around a source can provide importantExpand
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Suzaku Observations of the Local and Distant Hot ISM
Suzaku observed the molecular cloud MBM 12 and a blank field less than 3 ◦ away to separate the local and distant components of the diffuse soft X-ray background. Towards MBM 12, a local (D 275pc) OExpand
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A Million Second Chandra View of Cassiopeia A
We introduce a million second observation of the supernova remnant Cassiopeia A with the Chandra X-Ray Observatory. The bipolar structure of the Si-rich ejecta (northeast jet and southwestExpand
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Discriminating the Progenitor Type of Supernova Remnants with Iron K-Shell Emission
Supernova remnants (SNRs) retain crucial information about both their parent explosion and circumstellar material left behind by their progenitor. However, the complexity of the interaction betweenExpand
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XMM-Newton Observations of the Galactic Supernova Remnant CTB 109 (G109.1–1.0)
We present the analysis of the X-ray Multimirror Mission (XMM-Newton) European Photon Imaging Camera (EPIC) data of the Galactic supernova remnant (SNR) CTB 109 (G109.1-1.0). CTB 109 is associatedExpand
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An X-Ray Jet Discovered by Chandra in the z = 4.3 Radio-selected Quasar GB 1508+5714
We report the Chandra discovery of an X-ray jet associated with the z = 4.3 radio-loud quasar GB 1508+5714. The jet X-ray emission peaks ~2'' to the southwest of the quasar core. We present archivalExpand
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Chandra View of Kesteven 79: A Nearly Isothermal Supernova Remnant with Rich Spatial Structure
A 30 ks Chandra ACIS-I observation of Kes 79 reveals rich spatial structures, including many filaments, three partial shells, a loop, and a "protrusion." Most of them have corresponding radioExpand
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