کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1780080 1523792 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High velocity outflows in narrow absorption line quasars
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم نجوم و فیزیک نجومی
پیش نمایش صفحه اول مقاله
High velocity outflows in narrow absorption line quasars
چکیده انگلیسی

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 αOXαOX and ΔαOXΔαOX 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 ΔαOXΔαOX suggest absorption in the UV band. The positive values of ΔαOXΔαOX 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: New Astronomy Reviews - Volume 53, Issues 7–10, July–October 2009, Pages 128–132
نویسندگان
, , , , , , , , ,