An Analysis of AGN-Driven Outflows in the Seyfert 1 Galaxy NGC 3227
arxiv(2024)
摘要
We have characterized the ionized, neutral, and warm molecular gas kinematics
in the Seyfert 1 galaxy NGC 3227 using observations from the Hubble Space
Telescope Space Telescope Imaging Spectrograph, Apache Point Observatory's Kitt
Peak Ohio State Multi-Object Spectrograph, Gemini-North's Near-Infrared
Integral Field Spectrometer, and the Atacama Large Millimeter Array. We fit
multiple Gaussians to several spatially-resolved emission lines observed with
long-slit and integral-field spectroscopy and isolate the kinematics based on
apparent rotational and outflowing motions. We use the kinematics to determine
an orientation for the bicone along which the outflows travel, and find that
the biconical structure has an inclination of 40 ^+5_-4 from our
line of sight, and a half-opening angle with an inner and outer boundary of 47
^+6_-2 and 68 ^+1_-1, respectively. We observe ionized
outflows traveling 500 km s^-1 at distances up to 7” (800 pc) from the
SMBH, and disturbed ionized gas up to a distance of 15” (1.7 kpc). Our
analysis reveals that the ionized outflows are launched from within 20 pc of
the SMBH, at the same location as a bridge of cold gas across the nucleus
detected in ALMA CO(2-1) observations. We measure a turnover radius where the
gas starts decelerating at a distance of 26 ± 6 pc from the AGN. Compared
to a turnover radius in the range of 31- 63 pc from a radiative driving
model, we confirm that radiative driving is the dominant acceleration mechanism
for the narrow line region (NLR) outflows in NGC 3227.
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