1. ASGC Statewide Symposium April 18, 2009

2. Tracing the Intergalactic Medium: QSO Absorption Spectra and Galaxy Redshifts Allison Strom 1, Jill Bechtold 1, Buell Jannuzi 2 1 University of Arizona, 2 National Optical Astronomy Observatory

3. ASGC Statewide Symposium April 18, 2009 Introduction Gaseous and luminous matter interact and affect formation of large scale structure throughout history of universe Broad, “brute force” approach: take census of everything there Detection and observation –Stars directly observed –Gas indirectly observed, requires external light source

4. 70 Mpc Z = 6 Z = 2 Z = 0 Evolution of galaxies, stars, galaxy clusters dark matter environment V. Springel

5. Univ. Colorado, Boulder

6. ASGC Statewide Symposium April 18, 2009 Womble, Sargent, and Lyons 1996 Bahcall, Jannuzi, Schneider, Hartig, Bohlin, & Junkkarinen 1991 Q1422+2309 z = 3.63 Keck I and HIRES 3C 273 z = 0.158 HST and FOS

7. ASGC Statewide Symposium April 18, 2009 Q0107-025 Morris and Jannuzi, 2006

8. ASGC Statewide Symposium April 18, 2009 Deimos and Galaxy Redshifts Obj. 30341 Slit 065 z = 0.20432

9. ASGC Statewide Symposium April 18, 2009 Deimos and Galaxy Redshifts Obj. 29409 Slit 044 z = 0.71960

10. ASGC Statewide Symposium April 18, 2009 Deimos and Galaxy Redshifts Obj. 33050 Slit 054 z = 0.89900

11. ASGC Statewide Symposium April 18, 2009 Deimos and Galaxy Redshifts Obj. 24584 Slit 021 z = 0.65294

12. N. Crighton

13. ASGC Statewide Symposium April 18, 2009 Looking Forward and Looking Back Identify serendipitous observations Catalog Ly  absorption lines –Redshift –Column density Correlate absorption features and absorbers –Two-point correlation function –“Nearest neighbor” approximation Special thanks to Michael Cooper and Neil Crighton