Unraveling the Accretion Disk Spectrum in the Symbiotic Binary R Aquarii

Details Unraveling the Accretion Disk Spectrum in the Symbiotic Binary R Aquarii Unraveling the Accretion Disk Spectrum in the Symbiotic Binary R Aquarii

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21822503k&link_type=abstract

American Astronomical Society, AAS Meeting #218, #225.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

R Aquarii is a symbiotic binary with jets and outer thermal lobes. It is known to contain a Mira red giant and its companion is generally believed to be a white dwarf. Here, we analyze the X-ray spectrum of the central binary. We observe several components: a soft thermal source, T 5e6 K, a hard heavily obscured thermal source, T 1.4e8 K, and apparently a complex series of fluorescence lines dominated by Fe Kalpha, but including a series of lines from even Z elements down to C. We compare relative intensities with models of collisional and photo excitation in cool gas. The shape of the Fe Kalpha line may give information on the compactness of the companion.

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