Keck Adaptive Optics
Galaxies are difficult targets for adaptive optics because the
extension of the nuclei and the reduced contrast of the nucleus with
respect to the disk and/or bulge means that artefacts can easily
appear. The sharper and more contrasted the nucleus the better the
resulting correction. NGC 7469, which has an unresolved nucleus in HST
images provides a good example of such an object.
The close environment of the Seyfert 1 galaxy NGC 7469.
These images of NGC 7499 were obtained by locking the loop on
the nucleus of the galaxy itself, a magnitude 13.5.