335 citations · 8.1k across the 221 of their papers we have counts for
6 papers · 2 filters
Search for cold gas in z>2 damped Lyman-alpha systems: 21-cm and H_2 absorption
R. Srianand, N. Gupta, P. Petitjean +4
(Abridged) We present the results of a systematic GBT and GMRT survey for 21-cm absorption in a sample of 10 DLAs at 2<z_abs<3.4. Analysis of L-band VLBA images of the background Q…
A high resolution study of intergalactic O VI absorbers at z~2.3
S. Muzahid, R. Srianand, J. Bergeron +1
[Abridged] 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…
Probing spectral properties of radio-quiet quasars searched for optical microvariability-II
Ravi Joshi, Hum Chand, Paul J. Wiita +2
In the context of AGN unification scheme rapid variability properties play an important role in understanding any intrinsic differences between sources in different classes. In thi…
Partial coverage of the Broad Line Region of Q1232+082 by an intervening H2-bearing cloud
S. A. Balashev, P. Petitjean, A. V. Ivanchik +4
We present a detailed analysis of the partial coverage of the Q1232+082 (z_em =2.57) broad line region by an intervening H_2-bearing cloud at z_abs=2.3377. Using curve of growth an…
High-ion absorption in the proximate damped Lyman-alpha system toward Q0841+129
Andrew J. Fox, Cédric Ledoux, Patrick Petitjean +2
We present VLT/UVES spectroscopy of the quasar Q0841+129, whose spectrum shows a proximate damped Lyman-alpha (PDLA) absorber at z=2.47621 and a proximate sub-DLA at z=2.50620, bot…
Weighing neutrinos using high redshift galaxy luminosity functions
Charles Jose, Saumyadip Samui, Kandaswamy Subramanian +1
Laboratory experiments measuring neutrino oscillations, indicate small mass differences between different mass eigenstates of neutrinos. The absolute mass scale is however not dete…