Sc. Chapman et al., Near-infrared adaptive optics imaging of nuclear spiral structure in the Seyfert galaxy NGC 3227, M NOT R AST, 319(3), 2000, pp. 666-676
We present high spatial resolution, near-infrared images in J, H and K of t
he nucleus of NGC 3227, obtained with the Adaptive Optics Bonnette on the C
anada-France-Hawaii Telescope. The similar to0.15 arcsec (17 pc) resolution
allows structures to be probed in the core region. Dust obscuration become
s significantly less pronounced at longer wavelengths, revealing the true g
eometry of the core region. We are able to identify two main features in ou
r maps: (i) a spiralling association of knots with a counterpart in a Hubbl
e Space Telescope F606W image; and (ii) a smaller-scale annulus, orthogonal
to the spiral of knots. These features may provide a means to transport ma
terial inwards to fuel the active nucleus.