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| Paper: |
Measuring Feedback in Nearby AGN |
| Volume: |
460, AGN Winds in Charleston |
| Page: |
261 |
| Authors: |
Crenshaw, D. M.; Fischer, T. C.; Kraemer, S. B.; Schmitt, H. R.; Turner, T. J. |
| Abstract: |
We investigate the impact of feedback from outflowing UV and X-ray absorbers in
nearby (z < 0.04) AGN. From studies of the kinematics, physical conditions,
and variability of the absorbers in the literature, we calculate the possible
ranges in total mass outflow rate (Ṁout) and kinetic luminosity
(LK) for each AGN, summed over all of the absorbers. These calculations make
use of values (or limits) for the radial locations of the absorbers determined
from variability, excited-state absorption, or other considerations. From a
sample of 10 Seyfert 1 galaxies with detailed photoionization models for their
absorbers, we find that 7 have sufficient constraints on the absorber locations
to determine Ṁout and LK. The 6 Seyfert 1s with moderate
bolometric luminosities (Lbol = 1043 – 1045 ergs s-1) all have
mass outflow rates that are 10 – 1000 times the mass accretion rates needed to
generate their observed luminosities, indicating that most of the mass outflow
originates from outside the inner accretion disk. Three of these (NGC 4051,
NGC 3516, and NGC 3783) have LK in the range 0.5 – 5% Lbol, which is
the range typically required by feedback models for efficient self-regulation of
black-hole and galactic bulge growth. The other three (NGC 5548, NGC 4151, and
NGC 7469) have LK > 0.1%Lbol, although these values may increase
if radial locations can be determined for more of the absorbers. We conclude
that the outflowing UV and X-ray absorbers in moderate-luminosity AGN have the
potential to deliver significant feedback to their environments. |
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