English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We conducted a survey of quasar outflows using the VLT/X-shooterspectrograph. When choosing the 14 BAL and mini-BALs comprising this sample,the data did not cover the S IV and S IV* troughs, whose ratio can be used todetermine the distance of the outflows from the central source (R). Therefore,this "Blind Survey" is unbiased towards a particular distance scale. Out of theeight outflows where R can be measured, six have R > 100 pc (spanning the range100-4500 pc), one has R > 10 pc, and only one (at R < 60 pc) is compatible witha much smaller R scale. At least two of the outflows have a kinetic luminositygreater than 0.5% of their Eddington luminosity, implying that they are able toprovide significant AGN feedback. The outflows span a range of 0 to -10000 kms$^{-1}$ in velocity; total column density between 10$^{20}$ - 10$^{22.5}$cm$^{-2}$ ; ionization parameter ($U_H$ ) in the range 0.01 - 1; and electronnumber density between 10$^3$ - 10$^{5.5}$ cm$^{-3}$ , with one upper and onelower limit. The results of this survey can be extrapolated to the majority ofBAL outflows, implying that most of these outflows are situated far away fromthe AGN accretion disk; and that a significant portion of them can contributeto AGN feedback processes.

VLT/X-Shooter Survey of BAL Quasars: Large Distance Scale and AGN Feedback