2009ApJ...694....1S


Query : 2009ApJ...694....1S

2009ApJ...694....1S - Astrophys. J., 694, 1-11 (2009/March-3)

The impact of accretion disk winds on the X-ray spectra of active galactic nuclei. II. Xscort + hydrodynamic simulations.

SCHURCH N.J., DONE C. and PROGA D.

Abstract (from CDS):

We use XSCORT, together with the hydrodynamic accretion disk wind simulation from Proga & Kallman, to calculate the impact that the accretion disk wind has on the X-ray spectra from 108 solar mass black hole active galactic nuclei (AGNs) accreting at 0.5 L/LEdd. The numerical simulation provides a set of self-consistent physical properties for the outflow that mitigates many of the problems inherent in previous XSCORT simulations. The properties of the resulting spectra depend on the viewing angle and clearly reflect the distinct regions apparent in the original hydrodynamic simulation. Very equatorial lines of sight (LOSs) encounter extremely Compton thick column densities and produce spectra that are dominated by Compton scattering and nearly neutral absorption. Polar LOSs encounter small, highly ionized, column densities, and result in largely featureless spectra. Finally, LOSs that intersect the transition region between these extremes encounter moderately ionized, marginally Compton thick column densities, which imprint a wide range of absorption features on the spectrum. Both polar and transition region LOSs produce spectra that show highly ionized, blueshifted, Fe absorption features that are qualitatively similar to features observed in the X-ray spectra of a growing number of AGNs. The spectra cannot reproduce the > 8 keV lines, or the deep ∼ 7-13 keV absorption trough, observed in some high-redshift quasars, although a considerably faster wind may well be able to reproduce these features. The spectra presented here clearly demonstrate that current simulations of line-driven AGN accretion disk winds cannot reproduce the smooth, soft X-ray excess. Furthermore, they predict that high accretion rate (L/LEdd) AGNs are likely to be strongly affected by obscuration, in sharp contrast to the clean picture that is generally assumed, based on the observed relation between the opening angle of the molecular torus and AGN luminosity.

Abstract Copyright: ∼

Journal keyword(s): accretion, accretion disks - galaxies: active - quasars: general - radiative transfer - X-rays: galaxies

Simbad objects: 9

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Number of rows : 9
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
2 QSO J0831+5245 QSO 08 31 41.7108197808 +52 45 17.616994560   19.2   14.5 13.9 ~ 574 1
3 Ton 951 Sy1 08 47 42.4485615096 +34 45 04.482515304   14.83 14.50     ~ 487 0
4 NGC 3516 Sy1 11 06 47.4632200800 +72 34 07.298374656   13.12 12.40     ~ 1638 0
5 QSO B1115+080A QSO 11 18 16.951 +07 45 58.23   16.61 16.44     ~ 703 2
6 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1765 1
7 NGC 4051 Sy1 12 03 09.6101337312 +44 31 52.682601288   11.08 12.92 9.94   ~ 2270 1
8 PB 3894 Sy1 12 14 17.6738687784 +14 03 13.182723144   14.46 14.19     ~ 873 0
9 QSO B1725-142 QSO 17 28 19.7893499760 -14 15 55.854918288   14.69 14.03 13.7   ~ 362 0

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