Browsing by Subject "Quasars: absorption lines"

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Appearance versus disappearance of broad absorption line troughs in quasars

Mishra, Sapna; Vivek, M; Chand, Hum; Joshi, Ravi (Oxford University Press on behalf of the Royal Astronomical Society, 2021-07)

We present a new set of 84 broad absorption line (BAL) quasars (1.7 < zem < 4.4) exhibiting an appearance of C IV BAL troughs over 0.3–4.8 rest-frame years by comparing the Sloan Digital Sky Survey Data Release (SDSSDR)-7, ...
Fraction of broad absorption line quasars in different radio morphologies

Nair, A; Vivek, M (Oxford University Press on behalf of Royal Astronomical Society, 2022-04)

In this study, we investigated the orientation model of Broad Absorption Line (BAL) quasars using a sample of sources that are common in Sloan Digital Sky Survey (SDSS) Data Release (DR)-16 quasar catalogue and Very Large ...
Host galaxies of ultrastrong Mg II absorbers at z ∼ 0.5

Guha, Labanya Kumar; Srianand, Raghunathan; Dutta, Rajeshwari; Joshi, Ravi; Noterdaeme, Pasquier; Petitjean, Patrick (Oxford University Press on behalf of Royal Astronomical Society, 2022-07)

From a sample of 109 candidate ultrastrong Mg II (USMg II; having rest equivalent width of Mg II, W2796 > 3.0 Å) systems at z = 0.4–0.6, we confirm 27 and identify host galaxies of 20 systems based on associated nebular ...

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