Academic Background

• B.Sc. in Physics & Mathematics, 1971, Glasgow University
• Ph.D. in Physics, 1980, Boston University

Research Interests

The Epoch of Reionization

• The sources of ionizing radiation at z > 6
• Observational effects of hydrogen and helium reionization of the intergalactic medium from quasar absorption lines

Metals in the Intergalactic Medium

• The presence and distribution of metals in the intergalactic medium at high redshift
• The evolution of the metallicity of the intergalactic medium

Cosmology from observations of quasar absorption lines

• The temperature of the cosmic microwave background at high redshift
• Constraints on the variability of fundamental constants

Galaxy formation and evolution

• Lyman Alpha Emitting galaxies as probes of galaxy formation & evolution
• Imaging and spectroscopy of faint galaxy samples
• Gas in galaxy halos and its relation to galaxy formation

Selected Papers

• A. Songaila & L. L. Cowie 2014, ApJ, 793, 103.
  Constraining the Variation of the Fine-Structure Constant with Observations of Narrow Quasar Absorption Lines
• A. Songaila & L. L. Cowie 2010, ApJ, 721, 1448.
  The Evolution of Lyman Limit Absorption Systems to Redshift Six
• A. Songaila 2005, AJ, 130, 1996.
  The Properties of Intergalactic C IV Absorption, I: Optimal Analysis of an Extremely High S/N Quasar Sample
• A. Songaila 2004, AJ, 127, 2598.
  The Evolution of the Intergalactic Medium Transmission to Redshift 6
• A. Songaila & L. L. Cowie 2002, AJ, 123, 2183.
  Approaching Reionization: The Evolution of the Ly alpha Forest from z = 4 to z = 6
• A. Songaila, 2001, ApJ 561, L153.
  The Minimum Universal Metal Density between Redshifts of 1.5 and 5.5