Astronomy and Astrophysics – Astrophysics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...200.3315t&link_type=abstract
American Astronomical Society, 200th AAS Meeting, #33.15; Bulletin of the American Astronomical Society, Vol. 34, p.689
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
QSO absorption lines provide a sensitive probe of the physical conditions and composition of gas in halos and disks of galaxies as well as the diffuse intergalactic medium. Several examples of the application of low-redshift QSO absorbers to the study of gaseous halos/disks will be reviewed, including (1) constraints on the metal enrichment and physical conditions of the Milky Way high-velocity clouds, (2) absorption spectroscopy of the interstellar media of nearby spiral galaxies including the interarm region of NGC4319 and the extended (ionized) disk of an edge-on galaxy (G1543+4856), and (3) the properties and enrichment of intergalactic gas at various impact parameters (r) from galaxies with measured redshifts (100 kpc < r < 1 Mpc). This talk will focus on results obtained with the Space Telescope Imaging Spectrograph and the Far Ultraviolet Spectroscopic Explorer, but some comments will be made on the vast expansion of the topic that will occur when the Cosmic Origins Spectrograph is installed on HST. Support for this work was provided by NASA through the Long Term Space Astrophysics Grant NAG5-11136.
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