The z-dependence of the spin temperature of HI

Details The z-dependence of the spin temperature of HI The z-dependence of the spin temperature of HI

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2345..269k&link_type=abstract

In NASA. Goddard Space Flight Center Local Interstellar Medium, No. 81 p 269-273 (SEE N85-15539 06-90)

Physics

2

Hydrogen Clouds, Milky Way Galaxy, Vertical Distribution, Absorption Spectra, Emission Spectra

Scientific paper

In 1981 the authors conducted an extensive, low-latitude, H I 21-cm absorption survey from the VLA. The goal of the survey was to answer the following questions: (1) What is the vertical distribution of the cold H I clouds? (2) Do H I clouds get systematically warmer at high |z|? (3) Does the fraction of warm intercloud medium H I increase with high |z|? (4) How much H I has been missed in previous H I emission surveys because of optical depth effects? (5) What is the galactic distribution of cool H I clouds? The authors present preliminary results which shed some light on the first four questions.

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