Antoinette Songaila Cowie

Astronomer
IfA Mānoa, B-219
(808) 956-8379(808) 956-8379

About

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