Physical conditions in CaFe interstellar clouds

Details Physical conditions in CaFe interstellar clouds Physical conditions in CaFe interstellar clouds

2007-07-31

arxiv.org/abs/0707.4581v2

Astron.Astrophys.477:543,2008

Astronomy and Astrophysics

Astrophysics

Changed content, figure added

Scientific paper

10.1051/0004-6361:20078602

Interstellar clouds that exhibit strong Ca I and Fe I lines were called CaFe clouds. The ionisation equilibrium equations were used to model the column densities of Ca II, Ca I, K I, Na I, Fe I and Ti II in CaFe clouds. The chemical composition of CaFe clouds is that of the Solar System and no depletion of elements onto dust grains is seen. The CaFe clouds have high electron densities n=1 cm^-3 that leads to high column densities of neutral Ca and Fe.

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