Resolving the mystery of the 6.7 keV-line emission from the Galactic Centre

Details Resolving the mystery of the 6.7 keV-line emission from the Galactic Centre Resolving the mystery of the 6.7 keV-line emission from the Galactic Centre

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..243s&link_type=abstract

XMM-Newton Proposal ID #04066702

Other

Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Gcp_1, Gcp_2, Xmm-Newton Proposal 04066702

Scientific paper

The Galactic Centre Region emits a strong 6.7 keV line attributable to Ka emission of helium-like iron. The origin of this emission has remained a puzzle since its discovery. Arguably, recent Chandra results imply that the line is produced in a very hot extended plasma, whereas other arguments favour a point source origin. In particular within 12' of Sgr A*, the radial profiles of the line surface brightness and the surface density of weak X-ray sources are rather similar. Here we propose to measure the surface brightness distribution of the 6.7-keV line emission out to a radius of ~35' as a test of the competing scenarios for its origin.

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