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

Although now routinely incorporated into hydrodynamic simulations of galaxyevolution, the true importance of the feedback effect of the outflows driven byactive galactic nuclei (AGN) remains uncertain from an observationalperspective. This is due to a lack of accurate information on the densities,radial scales and level of dust extinction of the outflow regions. Here we usethe unique capabilities of VLT/Xshooter to investigate the warm outflows in arepresentative sample of 9 local (0.06 $<$ z $<$ 0.15) ULIRGs with AGN nucleiand, for the first time, accurately quantify the key outflow properties. Wefind that the outflows are compact (0.05 $<$ R$_{[OIII]}$ $<$ 1.2 kpc),significantly reddened (median E(B-V)$\sim$0.5 magnitudes), and have relativelyhigh electron densities (3.4 $<$ log$_{10}$ n$_e$ (cm$^{-3}$) $<$ 4.8). It isnotable that the latter densities -- obtained using trans-auroral [SII] and[OII] emission-line ratios -- exceed those typically assumed for the warm,emission-line outflows in active galaxies, but are similar to those estimatedfor broad and narrow absorption line outflow systems detected in some type 1AGN. Even if we make the most optimistic assumptions about the true(deprojected) outflow velocities, we find relatively modest mass outflow rates($0.07 < \dot{M} < 11$ M$_{sol}$ yr$^{-1}$) and kinetic powers measured as afraction of the AGN bolometric luminosities ($4\times10^{-4} < \dot{E}/L_{BOL}<1$%). Therefore, although warm, AGN-driven outflows have the potential tostrongly affect the star formation histories in the inner bulge regions ($r\sim$ 1kpc) of nearby ULIRGs, we lack evidence that they have a significantimpact on the evolution of these rapidly evolving systems on larger scales.

Quantifying the AGN-driven outflows in ULIRGs (QUADROS) I: VLT/Xshooter observations of 9 nearby objects