Other
Scientific paper
May 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.0222t&link_type=abstract
American Astronomical Society Meeting 210, #02.22; Bulletin of the American Astronomical Society, Vol. 39, p.96
Other
Scientific paper
We present an archival XMM-Newton observation of IC 2560, a host galaxy for 22 GHz megamaser emission. The X-ray spectrum shows soft X-ray emission due to ionized plasma, a hard X-ray continuum and strong emission features, mostly due to fluorescence. We find the X-ray spectrum to be consistent with reflection from a mostly neutral material and obscuration due to a very high column density, greater than 1025 cm-2. The X-ray spectrum also shows a scattered component of the intrinsic emission as well as an emission line at 6.7 keV possibly due to FeXXV, undetected in previous X-ray observations of this source. We hypothesize that the highly ionized Fe line emission originates in the scattering medium. Emission lines at intermediate ionization levels are not detected. This indicates the presence of a cold, dense, mostly neutral optically thick reflector and a distinct scattering medium, a warm, optically thin, fairly highly ionized gas. We compare the multiwavelength properties of this source with other megamasers in order to constrain its geometry.
Done Christine
Greenhill Lincoln
Madejski Greg
Tilak Avanti
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