Search for Extended Galactic Halos (fos 23) Augmentation: Cycle 2 Observations

Details Search for Extended Galactic Halos (fos 23) Augmentation: Cycle 2 Observations Search for Extended Galactic Halos (fos 23) Augmentation: Cycle 2 Observations

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992hst..prop.4061b&link_type=abstract

HST Proposal ID #4061

Statistics

Hst Proposal Id #4061

Scientific paper

Use QSOs projected close to nearby galaxies to search for halos sufficiently extended to explain the observed statistics of QSO absorption line spectra. Different candidate galaxies have been chosen, including some known to have extended 21 cm halos, galaxies in and out of clusters, etc. Galaxies are chosen with z>0.001 where possible, so that local Lyman alpha absorption can be resolved from a galaxian column density of 2E19 of HI in our R=1200 mode. This is a UV specific problem that requires ST collecting area. A positive detection will produce a point on the rotation curve far into the galaxy halo, as well as crude information on the physical conditions of the halo gas. Each spectrum will also contain information on the gas distribution of our galaxy.

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