Journal
ASTROPHYSICAL JOURNAL
Volume 652, Issue 2, Pages 1318-1330Publisher
IOP PUBLISHING LTD
DOI: 10.1086/508133
Keywords
dust, extinction; scattering; X-rays : general; X-rays : ISM
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We calculate the scattering of X-rays by interstellar dust for a dust model that reproduces the observed wavelength-dependent extinction and polarization of starlight. On interstellar sight lines that produce appreciable starlight polarization, we predict that the dust-scattered X-ray halo around point sources will have measurable azimuthal asymmetry due to scattering by partially aligned nonspherical grains. We calculate the expected halo asymmetry. X-ray halo asymmetry provides a new test of interstellar dust models.
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