Physical conditions in outflow quasars

Details Physical conditions in outflow quasars Physical conditions in outflow quasars

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011hsa6.conf..386j&link_type=abstract

Highlights of Spanish Astrophysics VI, Proceedings of the IX Scientific Meeting of the Spanish Astronomical Society (SEA), held

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a detailed analysis of several high-redshift (2.5 ≤ z ≤ 4.2) quasars presenting resolved absorption doublets(such as CIV, SiIV and NV) in their spectra, based on high-resolution WHT+ISIS observations: 0217-0854,0844+0503, 1236+4533 and 1624+3758, which have known radio counterparts observed by the VLA FIRST survey, and 0908+0658 and 1210+5256. Covering factors and column densities of several atomic species in the absorbing gas have been measuredby comparison of the residual intensities in the two components of the doublets. From these, the ionisation parametershave been estimated providing constraints on the distance of the gas from the nucleus (for plausible assumed values ofelectron densities), and therefore the kinetic luminosity of the outflow. We infer that the outflows studied here are notenergetic enough to significantly contribute to AGN feedback processes since the maximum percentage of the kineticluminosity with respect to the bolometric luminosity of the quasar is ≤ 0.003%.

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