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Paper: Measuring ISM Molecular Abundances in the Direction of Cassiopeia A by Comparing X-ray and Radio Absorption Studies
Volume: 99, Cosmic Abundances
Page: 362
Authors: Keohane, Jonathan W.
Abstract: ASCA derived column densities are compared with 21 cm H I and 18 cm OH optical depths in the direction of Cas A. The H I spin temperature and the ratio OH/H_2 are measured. Revised abundance ratios are calculated for the molecules: 13CO, 12CO, H2CO and NH3.
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