335 citations · 1.6k across the 24 of their papers we have counts for
23 papers
In response to the comments by Murphy et al. (arxiv:0708.3677)
Raghunathan Srianand, Hum Chand, Patrick Petitjean +1
In their comment, Murphy et al. (arxiv:0708.3677) criticize the fitting procedure we used in two previous papers [Srianand et al. 2004(Paper I) and Chand et al. 2004 (Paper II)] an…
The O VI Absorbers Toward PG0953+415: High Metallicity, Cosmic-Web Gas Far From Luminous Galaxies
Todd M. Tripp, Bastien Aracil, David V. Bowen +1
The spectrum of the low-redshift QSO PG0953+415 shows two strong, intervening O VI absorption systems. To study the nature of these absorbers, we have used the Gemini Multiobject S…
Relative abundance pattern along the profile of high redshift Damped Lyman-alpha systems
E. Rodriguez, P. Petitjean, B. Aracil +2
We investigated abundance ratios along the profiles of six high-redshift Damped Lyman-alpha systems, three of them associated with H2 absorption, and derived optical depths in each…
On the variation of the fine-structure constant: Very high resolution spectrum of QSO HE 0515-4414
Hum Chand, Raghunathan Srianand, Patrick Petitjean +3
We present a detailed analysis of a very high resolution (R\approx 112,000) spectrum of the quasar HE 0515-4414 obtained using the High Accuracy Radial velocity Planet Searcher (HA…
High Metallicity, Photoionised Gas in Intergalactic Large-Scale Filaments
Bastien Aracil, Todd M. Tripp, David V. Bowen +3
We present high-resolution UV spectra of absorption-line systems toward the low-z QSO HS0624+6907 (z=0.3700). Coupled with spectroscopic galaxy redshifts, we find that many of thes…
A new constraint on the time dependence of the proton-to-electron mass ratio. Analysis of the Q 0347-383 and Q 0405-443 spectra
A. Ivanchik, P. Petitjean, D. Varshalovich +5
A new limit on the possible cosmological variation of the proton-to-electron mass ratio μ=m_p/m_e is estimated by measuring wavelengths of H_2 lines of Lyman and Werner bands from…