Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.1204v&link_type=abstract
American Astronomical Society, HEAD meeting #11, #12.04; Bulletin of the American Astronomical Society, Vol. 41, p.674
Astronomy and Astrophysics
Astronomy
Scientific paper
The effects of interstellar dust grains can be seen along almost all sightlines in the Galaxy. Decades of study have produced grain models that are constrained by elemental abundances and UV-IR observations, but, as they were constructed using only this data, the vast majority of these cannot meet constraints placed on them by X-ray observations. X-ray dust halos, arising from scattering off interstellar dust grains, provide a wealth of information about the grains, particularly their sizes, compositions, porosities, and spatial distribution along a sightline. This information, used in conjunction with longer wavelength data, can be used to build more realistic grain models. To this end, we have used observations from XMM-Newton and Chandra to compile a database of X-ray dust halos.
Smith Randall K.
Valencic Lynne A.
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