Constraining Dust Grain Models with X-Ray and Multiwavelength Observations

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Stars, White Dwarfs, Solar System, Hd 166734, Xmm-Newton Proposal 05000301

Scientific paper

While interstellar dust is vitally important to Galactic cycling, necessary in both stellar system and molecule formation, the grains exact nature remains mysterious. An improved understanding of dust will lead to robust models that can more accurately recover intrinsic spectral energy distributions, as well as probing the grains environment. Current grain models, constrained by UV-NIR regimes and elemental abundances, are degenerate; we must look to other wavelength regimes to break the degeneracy and thus produce more realistic models. X-ray dust halos observed with XMM-Newton/EPIC are an excellent, and mostly untapped, grain characteristic diagnostic and can provide badly needed constraints on grain models.

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