131 citations · 2.2k across the 90 of their papers we have counts for
8 papers · 1 filter
Reporting a Deficit of Intrinsic NV Absorbers in Core-dominated, Radio-loud Quasars
Chris Culliton, Amber Roberts, Bryan DeMarcy +5
We searched the Hubble Space Telescope Cosmic Origins Spectrograph archive for ultraviolet spectra of 428 AGN to identify intrinsic NV absorption systems. We filtered out Type 2 AG…
Discovery of an HI-rich Gas Reservoir in the Outskirts of SZ-effect Selected Clusters
Sowgat Muzahid, Jane Charlton, Daisuke Nagai +2
We report on the detection of three strong HI absorbers originating in the outskirts (i.e., impact parameter, ) of three massive ($M_{500}\sim…
A Pair of O VI and Broad Ly-alpha Absorbers Probing Warm Gas in a Galaxy Group Environment at z ~ 0.4
Sachin Pachat, Anand Narayanan, Sowgat Muzahid +4
We report on the detection of two O VI absorbers separated in velocity by 710 km/s at z ~ 0.4 towards the background quasar SBS0957+599. Both absorbers are multiphase systems traci…
HST/COS observations of a new population of associated QSO absorbers
Sowgat Muzahid, Raghunathan Srianand, Nahum Arav +2
(Abridged) We present a sample of new population of associated absorbers, detected through Ne VIII λλ770,780 absorption, in HST/COS spectra of intermediate redshift (0.45 < z < 1.2…
Search for cold gas in strong MgII absorbers at 0.5<z<1.5: nature and evolution of 21-cm absorbers
N. Gupta, R. Srianand, P. Petitjean +3
We report 4 new detections of 21-cm absorption from a systematic search of 21-cm absorption in a sample of 17 strong (Wr(MgII 2796)>1A) intervening MgII absorbers at 0.5<z<1.5. We…
Highly Ionized Collimated Outflow from HE 0238 - 1904
Sowgat Muzahid, Raghunathan Srianand, Blair D. Savage +3
We present a detailed analysis of a highly ionized, multiphased and collimated outflowing gas detected through O V, O VI, Ne VIII and Mg X absorption associated with the QSO HE 023…
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…
Revisiting the He II to H I ratio in the Intergalactic Medium
Sowgat Muzahid, Raghunathan Srianand, Patrick Petitjean
We estimate the He II to H I column density ratio, η= N(He II)/N(H I), in the intergalactic medium towards the high redshift (z_{em} = 2.885) bright quasar QSO HE 2347-4342 using V…