X-ray Spectroscopy of the most extreme Balmer-line disk-emission AGN

Computer Science

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Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, J094215.12+0900, J161742.53+3222, J034330.01+0457, Xmm-Newton Proposal 04041105

Scientific paper

We propose to obtain simultaneous X-ray and UV observations of the most extreme AGN with double-peaked Balmer emission lines (FWHM > 19000km/s). We will use the XMM-Newton data to measure their X-ray spectral shapes and construct spectral energy distributions. We will combine these with measurements of the optical emission line profiles (from simultaneous HET observations) and luminosities to (a) test models for illumination of the outer disk by the central X-ray source, (b) test models for the structure of the inner accretion disk (radiatively inefficient accretion vs. standard disk), and (c) compare the X-ray-to-optical properties of these broadest Balmer-line objects to those of broad and narrow line AGN to test models for the origin of the low-ionization broad lines.

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