Interstellar dust silicates unveiled through the scattering halo of GX9+1

Details Interstellar dust silicates unveiled through the scattering halo of GX9+1 Interstellar dust silicates unveiled through the scattering halo of GX9+1

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop...28c&link_type=abstract

XMM-Newton Proposal ID #04006401

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Gx 9+1, Xmm-Newton Proposal 04006401

Scientific paper

We propose to observe the bright X-ray source GX 9+1 as the optimal candidate to study the chemistry of silicates in the vicinity of the galactic center. We will study the two phases of ISM (gas and dust) through the spectroscopy of the absorbed spectrum, and the spectral and spatial analysis of the X-ray dust scattering halo, with particular emphasis on the Mg and Si features. This approach has been successful for another XMM-Newton target (Cyg X-2, Costantini et al. 2005), unveiling, for the first time, features from the interstellar dust constituents. To perform a quantitative study of the chemistry of the interstellar dust grains, a large collecting area, a large field of view, and a broad band coverage, as provided by XMM-Newton, are essential.

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