Composition of the Interstellar Medium
Abstract
We present an analysis of the Fe II, Ge II, Mg I, Mg II, S I, S II, Si II and Zn II interstellar lines for 63 stars. The column density of Mg II, S II, Si II and Zn II is well correlated with the distance. However, the column density -- distance relation should be used with care for the estimation of the distance to OB stars. For stars with large this relation can lead to a large overestimation of the distance. Hydrogen -- normalised column densities of Mg II, Si II and Ge II (our largest samples of data) drop with the interstellar reddening E(B-V) as expected for elements that are incorporated into dust grains. The Ge II abundance (GeII/H) is lower in dense molecular clouds. The abundances of all analysed elements are generally lower than their Solar System values.
Cite
@article{arxiv.astro-ph/0611670,
title = {Composition of the Interstellar Medium},
author = {P. Gnacinski and M. Krogulec},
journal= {arXiv preprint arXiv:astro-ph/0611670},
year = {2010}
}