David Kirkman
- The Deuterium to Hydrogen Abundance Ratio toward a Fourth QSO: HS 0105+1619
2000/11/30 by John M. O'Meara, John M. O’Meara, David Tytler +7 · 339 citations
Chemistry · Physics and Astronomy · #Analytical Chemistry (journal) #Astrophysics #Atomic physics #Baryon #Chemistry #Cosmology and Gravitation Theories #Density ratio #Deuterium #Galaxy #Hydrogen #Intergalactic medium #Ion #Ionization #Lyman limit #Metallicity #Physics #Redshift #Scientific Research and Discoveries #Stellar, planetary, and galactic studies #astro-ph
- Cosmological Parameters σ8, the Baryon Density Ωb, the Vacuum Energy Density ΩΛ, the Hubble Constant and the UV Background Intensity from a Calibrated Measurement of HiLyα Absorption atz = 1.9
2004/03/31 by David Tytler, David Kirkman, John M. O'Meara +10 · 93 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Baryon #Cosmology and Gravitation Theories #Equivalent width #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Hubble's law #Intergalactic travel #Ionization #QSOS #Redshift #Reionization #Spectral line #astro-ph