Journal
ASTROPHYSICAL JOURNAL
Volume 542, Issue 2, Pages 914-924Publisher
IOP PUBLISHING LTD
DOI: 10.1086/317016
Keywords
atomic data; dust, extinction; ISM : abundances; X-rays : ISM
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We present an improved model for the absorption of X-rays in the interstellar medium (ISM) intended for use with data from future X-ray missions with larger effective areas and increased energy resolution such as Chandra and the X-Ray Multiple Mirror mission, in the energy range greater than or similar to 100 eV. Compared with previous work, our formalism includes recent updates to the photoionization cross section and revised abundances of the interstellar medium, as well as a treatment of interstellar grains and the H-2 molecule. We review the theoretical and observational motivations behind these updates and provide a subroutine for the X-ray spectral analysis program XSPEC that incorporates our model.
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