We determine the physical conditions and location of the outflow material seen in the mini-BAL quasar SDSS J1111+1437 (z = 2.138). These results are based on the analysis of a high S/N, medium-resolution VLT/X- shooter spectrum. The main outflow component spans the velocity range -1500 to -3000 km s−1 and has detected absorption troughs from both high-ionization species: C IV , N V , O VI , Si IV , P V , and S IV ; and low-ionization species: H I , C II , Mg II , Al II , Al III , Si II , and Si III . Measurements of these troughs allow us to derive an accurate photoionization solution for this absorption component: a hydrogen column density, log ( N H ) = 21.47 −0.27+0.21 cm−2 and ionization parameter, log (U_H) = -1.23−0.25+0.20. Troughs produced from the ground and excited states of S IV combined with the derived U_H value allow us to determine an electron number density of log (n_e) = 3.62−0.11+0.09 cm−3 and to obtain the distance of the ionized gas from the central source: R = 880−260+220 pc.
@article{arxiv.1805.01545,
title = {A Mini-BAL Outflow at 900 pc from the Central Source: VLT/X-shooter Observations},
author = {Xinfeng Xu and Nahum Arav and Timothy Miller and Chris Benn},
journal= {arXiv preprint arXiv:1805.01545},
year = {2019}
}