[33.15] Using QSO Absorption Lines to Study Gaseous Halos and Galaxy Edges

AAS 200th meeting, Albuquerque, NM, June 2002
Session 33. Gaseous Galaxy Halos and Edges of Disk Galaxies
Topical Session Oral, Tuesday, June 4, 2002, 8:30-10:00am, 10:45am-12:30pm, 2:00-3:30pm, 3:45-5:30pm, Ballroom A

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[33.15] Using QSO Absorption Lines to Study Gaseous Halos and Galaxy Edges

T. M. Tripp (Princeton University Observatory)

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.

The author(s) of this abstract have provided an email address for comments about the abstract: tripp@astro.princeton.edu

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