High velocity outflows in narrow absorption line quasars

G. Chartas, J. Charlton, M. Eracleous, M. Giustini, P. Rodriguez Hidalgo, R. Ganguly, F. Hamann, T. Misawa, D. Tytler

Research output: Contribution to journalShort surveypeer-review

31 Scopus citations


The current paradigm for the AGN phenomenon is a central engine that consists of an inflow of material accreting in the form of a disk onto a supermassive black hole. Observations in the UV and optical find high velocity ionized material outflowing from the black hole. We present results from Suzaku and XMM-Newton observations of a sample of intrinsic NAL quasars with high velocity outflows. Our derived values of the intrinsic column densities of the X-ray absorbers are consistent with an outflow scenario in which NAL quasars are viewed at smaller inclination angles than BAL quasars. We find that the distributions of αOX and Δ αOX of the NAL quasars of our sample differ significantly from those of BAL quasars and SDSS radio-quiet quasars. The NAL quasars are not significantly absorbed in the X-ray band and the positive values of Δ αOX suggest absorption in the UV band. The positive values of Δ αOX of the intrinsic NAL quasars can be explained in a geometric scenario where our lines of sight towards the compact X-ray hot coronae of NAL quasars do not traverse the absorbing wind whereas lines of sight towards their UV emitting accretion disks do intercept the outflowing absorbers.

Original languageEnglish (US)
Pages (from-to)128-132
Number of pages5
JournalNew Astronomy Reviews
Issue number7-10
StatePublished - Jul 2009

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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