126 citations · 285 across the 6 of their papers we have counts for
9 papers · 1 filter
Detection of the 2175Å~ extinction feature and 21-cm absorption in two MgII systems at z~1.3
R. Srianand, N. Gupta, P. Petitjean +2
We have discovered two dusty intervening MgII absorption systems at z~1.3 in the Sloan Digital Sky Survey (SDSS) database. The overall spectra of both QSOs are red (u-K>4.5 mag) an…
Detecting cold gas at intermediate redshifts: GMRT survey using Mg II systems
Neeraj Gupta, R. Srianand, P. Petitjean +3
Intervening HI 21-cm absorption systems at z > 1.0 are very rare and only 4 confirmed detections have been reported in the literature. Despite their scarcity, they provide interest…
Multiwavelength investigation of a near-solar metallicity sub-DLA at z =1.3647 towards PKS 0237-233
Raghunathan Srianand, Neeraj Gupta, Patrick Petitjean
We searched for 21-cm absorption associated with the z_abs = 1.3647 absorption system toward PKS 0237-233 using the GMRT. A high quality UVES spectrum shows that C I and C I* are d…
Associated 21-cm HI absorption towards the radio galaxy 3C452 (J2245+3941)
Neeraj Gupta, D. J. Saikia
We report the detection of 21-cm HI absorption towards the core of the Fanaroff-Riley II radio galaxy 3C452 (J2245+3941). The absorption profile is well resolved into three compone…
Unification scheme and the distribution of neutral gas in compact radio sources
Neeraj Gupta, D. J. Saikia
We examine the consistency of HI properties with the unification scheme for radio galaxies and quasars, and any correlation with the symmetry parameters for a sample of CSS and GPS…
Probing radio source environments via HI and OH absorption
Neeraj Gupta, C. J. Salter, D. J. Saikia +2
We present the results of HI and OH absorption measurements towards a sample of radio sources using the Arecibo 305-m telescope and the GMRT. In total, 27 radio sources were search…