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X-ray Spectra from Plasmas with High-Energy Electrons: kappa-distributions and e-e Bremsstrahlung
Xiaohong Cui, Adam R. Foster, Takayuki Yuasa +1
Shocks, turbulence and winds all influence the electron velocity distribution in hot plasmas, exciting lower-energy electrons and generating a high-energy (typically power-law) tai…
XMM-Newton RGS spectroscopy of the M31 bulge. I: Evidences for a past AGN half a million years ago
Shuinai Zhang, Q. Daniel Wang, Adam R. Foster +3
Existing analysis based on XMM-Newton/RGS spectra already shows that the G-ratio of the OVII He triplet in the inner bulge of M31 is too high to be consistent with a pure optica…
Non-equilibrium ionization in mixed-morphology supernova remnants
Gao-Yuan Zhang, Jonathan D. Slavin, Adam Foster +4
The mixed morphology class of supernova remnants (MMSNRs) comprises a substantial fraction of observed remnants and yet there is as yet no consensus on their origin. A clue to thei…
Eigenvalue Method for NEI Unit in FLASH Code
Gao-Yuan Zhang, Adam Foster, Randall Smith
We describe an improved nonequilibrium ionization (NEI) method that we have developed as an optional module for the FLASH magnetohydrodynamic simulation code. The method employs an…
EBIT Observation of Ar Dielectronic Recombination Lines Near the Unknown Faint X-Ray Feature Found in the Stacked Spectrum of Galaxy Clusters
Amy C. Gall, Adam R. Foster, Roshani Silwal +7
Motivated by possible atomic origins of the unidentified emission line detected at 3.55 keV to 3.57 keV in a stacked spectrum of galaxy clusters (Bulbul et al. 2014), an electron b…