We present the first results from our NASA Keck Observatory Database of Ionized Absorbers
toward Quasars (KODIAQ) survey which aims to characterize the properties of the highly …

We present the KODIAQ-Z survey aimed to characterize the cool, photoionized gas at 2.2≲
z≲ 3.6 in 202 H i-selected absorbers with 14.6≤ $\mathrm {log}{N} _ {{\rm {H}}\,{\rm\small …

Intergalactic absorbers along lines of sight to distant quasars are a powerful diagnostic for
the evolution and content of the intergalactic medium (IGM). In this study, we use the Far …

We report on the observed properties of the plasma revealed through high signal-to-noise
observations of 54 intervening O vi absorption systems containing 85 O vi and 133 H i …

With a column density log N (O vi)= 14.95±0.05, the O vi absorber at z abs≃ 0.2028
observed toward the quasi-stellar object PKS 0312–77 (z em= 0.223) is the strongest yet …

The O vi ion observed in quasar absorption-line spectra is the most accessible tracer of the
cosmic metal distribution in the low-redshift (z< 0.5) intergalactic medium (IGM). We explore …

We use the observed number and column density distributions of intergalactic O VI
absorbers to constrain the distribution of metals in the low-redshift intergalactic medium …

Abstract We present Hubble Space Telescope and Far Ultraviolet Spectroscopic Explorer
observations of the intergalactic absorption toward QSO PG 1116+ 215 in the 900-3000 Å …

We present a detailed study of the largest sample of intervening O vi systems in the redshift
range 1.9≤ z≤ 3.1 detected in high-resolution (R∼ 45 000) spectra of 18 bright quasi …

Far-UV echelle spectroscopy of the radio-quiet QSO H1821+ 643 (z em= 0.297), obtained
with the Space Telescope Imaging Spectrograph (STIS) at∼ 7 km s-1 resolution, reveals …