Composition of Gas in Individual Interstellar Clouds: Cycle 3 Medium Priority Observations

Details Composition of Gas in Individual Interstellar Clouds: Cycle 3 Medium Priority Observations Composition of Gas in Individual Interstellar Clouds: Cycle 3 Medium Priority Observations

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993hst..prop.4836s&link_type=abstract

HST Proposal ID #4836

Physics

Hst Proposal Id #4836

Scientific paper

Column densities of interstellar atoms of 17 atomic species of 10 elements will be measured in the line-of-sight to 2 early-type stars in the galactic disk, using the Goddard High Resolution Spectrograph to obtain precise measures in the ultraviolet with the highest available spectral resolution. These data will be analyzed to determine relative abundances in the several individual clouds present along each line of sight, and thus to determine how the composition of the gas in such clouds and the various physical processes occurring vary with cloud parameters such as H column density, velocity, ionization level, and distance z from the galactic plane. This information should help to clarify the many physical processes occurring in interstellar gas. The program should also increase our understanding of the balance between formation and destruction of interstellar dust grains.

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