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| Naji, M. |
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Mccammon, Dan
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Publications (5/5 displayed)
- 2017X-ray emission measurements following charge exchange between O8<SUP>+</SUP> and Kr
- 2016Fabrication of Superconducting Mo/Cu Bilayers Using Ion-Beam-Assisted e-Beam Evaporationcitations
- 2008Microcalorimeter Instruments for the Spectrum-R(X)G and NeXT Missionscitations
- 2007Hot-electron effects in strongly localized doped silicon at low temperaturecitations
- 2001Spectra of the 1/4 keV X-Ray Diffuse Background from the Diffuse X-Ray Spectrometer Experimentcitations
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article
Spectra of the 1/4 keV X-Ray Diffuse Background from the Diffuse X-Ray Spectrometer Experiment
Abstract
The Diffuse X-ray Spectrometer (DXS) flew as an attached payload on the STS-54 mission of the space shuttle Endeavour in 1993 January and obtained spectra of the soft X-ray diffuse background in the 148-284 eV (84-44 Å) band using a Bragg-crystal spectrometer. The spectra show strong emission lines, indicating that the emission is primarily thermal. Since the observations were made at low Galactic latitude, this thermal emission must arise from a nearby hot component of the interstellar medium, most likely the Local Hot Bubble, a region within ~100 pc of the Sun characterized by an absence of dense neutral gas. The DXS spectrum of the hot interstellar medium is not consistent with either collisional equilibrium models or with nonequilibrium ionization models of the X-ray emission from astrophysical plasmas. Models of X-ray emission processes appear not yet adequate for detailed interpretation of these data. The DXS data are most nearly consistent with models of thermal emission from a plasma with a temperature of 10<SUP>6.1</SUP> K and depletions of refractory elements magnesium, silicon, and iron to levels ~30% of solar....