X-ray photoionization experiments on the Z-machine: studying photoionized nebulae in the laboratory

Physics – Plasma Physics

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Scientific paper

Many interesting astrophysical plasmas are photoionized, rather than collisionally ionized, including those found in active galactic nuclei and x-ray binaries, among other accretion-powered sources. With the launch of the Chandra and XMM telescopes, and the anticipated higher-resolution microcalorimeter missions Astro-E2 and Constellation-X, the emission spectra from these sources can be studied in detail for the first time. We have begun a campaign of ride-along experiments on the Z-machine in which we study spectroscopically such X-ray photoionized plasmas, with the goals of studying the ionization kinematics and atomic physics and of benchmarking radiation-transport and spectral synthesis codes which are used to model photoionized astrophysical sources. I will describe these experiments, the initial results, and the associated modeling in this talk.

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