Building Dust Grain Models for Different ISM Environments

Details Building Dust Grain Models for Different ISM Environments Building Dust Grain Models for Different ISM Environments

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...20v&link_type=abstract

XMM-Newton Proposal ID #06009501

Computer Science

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Hd 153919

Scientific paper

Interstellar dust is a vital component of Galactic evolution, crucial to forming objects as small as H2 and as large as stars. Despite this, relatively little is known about the grains nature. Current grain models of the standard diffuse ISM , based on constraints from the NIR-UV regimes and assumed cosmic elemental abundances, cannot be applied to X-ray observations. New grain models that are constrained by data in the full NIR-UV-X-ray bandpasses, over a broad range of dust environments, are needed. X-ray dust halos from absorbed sources observed with XMM-Newton/EPIC are an excellent diagnostic of grain characteristics that can be used in conjunction with NIR-UV data to forge a comprehensive, realistic grain model that spans these regimes in both the dense and diffuse ISM.

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