On the Absorption of X-rays in the Interstellar Medium

Details On the Absorption of X-rays in the Interstellar Medium On the Absorption of X-rays in the Interstellar Medium

2000-08-28

arxiv.org/abs/astro-ph/0008425v1

Astrophys.J. 542 (2000) 914-924

Astronomy and Astrophysics

Astrophysics

ApJ, in press, for associated software see http://astro.uni-tuebingen.de/nh/

Scientific paper

10.1086/317016

We present an improved model for the absorption of X-rays in the ISM intended for use with data from future X-ray missions with larger effective areas and increased energy resolution such as Chandra and XMM, in the energy range above 100eV. Compared to 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 H2molecule. 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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