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The Millennium Arecibo 21-cm Absorption Line Survey: Extolling the Analysis Procedures

Carl Heiles

astro-pharXiv:astro-ph/0202266

Abstract

We have recently completed the analysis of a survey of the HI line in emission/absorption against 79 radio sources. Our CNM temperatures are about half those of previous authors and we find a substantial quantity of thermally unstable WNM. These results are somewhat controversial. Here we discuss the analysis procedures to illustrate explicitly why the results are reliable.

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