Combining X-ray Scattering with Extinction, Absorption, and Emission: Multiwavelength Constraints for Dust Grain Models

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Chandra Proposal Id #08910934

Scientific paper

While interstellar dust is vitally important to the Galaxy, being necessary both in 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 an object's intrinsic spectral energy distribution, and will allow us to probe 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 Chandra/ACIS are an excellent, and mostly untapped, grain characteristic diagnostic and can provide badly needed constraints on grain models.

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