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Session 110 - X-ray, Binaries & Accretion Disks.
Display session, Saturday, January 10
Exhibit Hall,

[110.10] H and He-like Ions Emission in the Spectra of X-ray Binaries.

M. A. Bautista, T. R. Kallman, N. E. White, L. Angelini (NASA/GSFC)

We study the emission from H and He-like ions, particularly oxygen and neon, observed in ASCA spectra of low-mass X-ray binaries (LMXBs). The observed strengths of these lines relative to the recombination continua seem to differ from the classic recombination model. This suggests a different excitation mechanism for the lines. Various mechanisms, inlcuding collisional excitation, continuum resonance fluorescence and three body recombination, are discussed.

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