X Per: The Template Sightline for the Diffuse Interstellar Medium

Details X Per: The Template Sightline for the Diffuse Interstellar Medium X Per: The Template Sightline for the Diffuse Interstellar Medium

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...22v&link_type=abstract

XMM-Newton Proposal ID #06009801

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, X Per

Scientific paper

Galactic interstellar dust is ubiquitous, but many aspects of the grains are not well known. Current model constraints, based on IR-UV data and assumed elemental abundances, are insufficient, as a plethora of viable models exist. Even the abundances are not well known; modelers must use proxies in the absence of direct measurements for the diffuse interstellar medium (ISM). Recent revisions of these proxy values have only added to confusion over which is the best representative for the diffuse ISM, and highlighted the need for direct measurements from the ISM itself. We will measure the O, Mg, Fe, and Si abundances along one sightline, to X Per, with the XMM-Newton RGS, and use them with our multiwavelength data for this sightline to construct a tightly-constrained, realistic grain model.

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