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HST/COS detection of a Ne VIII absorber towards PG 1407+265: An unambiguous tracer of collisionally ionized hot gas?
Tanvir Hussain, Sowgat Muzahid, Anand Narayanan +4
We report the detection of Ne VIII in a z_abs = 0.59961 absorber towards the QSO PG 1407+265 (z_em = 0.94). Besides Ne VIII, absorption from HI Lyman series lines (HI 1025 - 915),…
An HST/COS survey of molecular hydrogen in DLAs & sub-DLAs at z < 1: Molecular fraction and excitation temperature
Sowgat Muzahid, Raghunathan Srianand, Jane Charlton
We present the results of a systematic search for molecular hydrogen (H2) in low redshift () DLAs and sub-DLAs with cm$^{-2…
Halo Mass Dependence of HI and OVI Absorption: Evidence for Differential Kinematics
Nigel L. Mathes, Christopher W. Churchill, Glenn G. Kacprzak +4
We studied a sample of 14 galaxies (0.1 < z < 0.7) using HST/WFPC2 imaging and high-resolution HST/COS or HST/STIS quasar spectroscopy of Lya, Lyb, OVI1031, and OVI1037 absorption.…
Molecular hydrogen from z = 0.0963 DLA towards the QSO J1619+3342
Raghunathan Srianand, Hadi Rahmani, Sowgat Muzahid +1
We report the detection of H2 in a zabs= 0.0963 Damped Lyman-α (DLA) system towards zem = 0.4716 QSO J1619+3342. This DLA has log N(H I) = 20.55 (0.10), 18.13 < log N(H2) < 18.40,…
Probing the large and massive CGM of a galaxy at z ~ 0.2 using a pair of quasars
Sowgat Muzahid
We present analysis of two O VI absorbers at redshift z_{abs} = 0.227, detected in the spectra of two closely spaced QSO sightlines (Q 0107-025 A and B), observed with the Cosmic O…