ASGC Statewide Symposium April 18, 2009. Tracing the Intergalactic Medium: QSO Absorption Spectra and Galaxy Redshifts Allison Strom 1, Jill Bechtold.

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ASGC Statewide Symposium April 18, 2009

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

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

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

Univ. Colorado, Boulder

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

ASGC Statewide Symposium April 18, 2009 Q Morris and Jannuzi, 2006

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

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

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

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

N. Crighton

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

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