The 6.7 keV-line emission in the Galactic Centre

The Galactic Centre Region emits a strong 6.7keV line attributable to Kaemission of Helike iron, of which the origin has remained a puzzle since itsdiscovery. Arguably, recent Chandra results imply that the line is produced in ahot extended plasma. However, we have shown that the line has a relativelysmooth, circularly symmetric distribution centred on Sgr A* and a surfacebrightness which falls off with radius as 1/r over the range r3.12.. Thismirrors the distribution of the stellar population and adds strong support tothe hypothesis that the 6.7keV line originates in the summed emission of faintpoint sources. Here we propose to measure the surface brightness distribution ofthe 6.7keV line out to a radius of virgul35. as a test of the competing scenarios for its origin. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]