Assigned ID: 213 ----- Attempting Submission 1 (Thu Mar 06 22:19:04 GMT 2008) ----- We propose a one-year HST (and FUSE) Legacy Archive Program on the low-redshift IGM, associated galaxies, and interstellar high-velocity clouds (HVCs). We will produce a uniformly reduced, carefully analyzed set of spectra of extragalactic sources (AGN), based on observations made through 2004. These data are the highest quality, low-z quasar absorption-line (QAL) spectra, needed to guide plans for COS spectrographic research on the intergalactic medium (IGM) and Galactic HVCs. A comprehensive QAL database will provide the following benefits to the astronomical community: (1) Joint analysis of HST and FUSE absorbers in the low-z IGM and HVCs; (2) Measurements of the IGM baryon content, metallicity, and ionization state; (3) Probes of the thermal phases of IGM and HVC gas; (4) IGM signposts (Ly-alpha, Ly-beta, O~VI) for future UV and X-ray surveys of the cosmic web. Our survey will also assist in designing an HST Community Treasury Project, to survey quasar absorbers and intervening galaxy halos with COS.

QUASAR ABSORPTION LINES AND IGM 12 168400 See proposal false 0.0 0.0 false true false false false SUPPORTED