Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21443104e&link_type=abstract
American Astronomical Society, AAS Meeting #214, #431.04; Bulletin of the American Astronomical Society, Vol. 41, p.702
Astronomy and Astrophysics
Astronomy
Scientific paper
SS73 17 was an innocuous Mira-type symbiotic star until INTEGRAL and Swift discovered its bright hard X-ray emission. Suzaku observations then showed it emits three bright iron lines as well, with almost no emission in the 0.5-2 keV bandpass. The origin of the lines was unclear - scattered, thermal or photoionized sources, at high- or low-density were all plausible - requiring a 100 ksec Chandra HETG observation to resolve the question. We will present the first results from the recently completed observation of this unusual system, which may be the "missing link" that explains the line emission from the Galactic Ridge X-ray Emission (GRXE), as its iron lines have roughly the same radio as the GRXE while its soft X-ray flux is at or below ROSAT's detection threshold.
We acknowledge support for this work from the Chandra X-ray Center, under grant GO8-9032X
Eze Romanus
Smith Randall K.
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