干旱区生态环境知识资源中心

Galactic nuclei are complex dynamical systems, showing evidences for non-axisymmetry, multiple structures, and dynamical decoupling. Detailed interpretation of one or even a few long-slit data sets can thus be strongly impaired by the prejudices consisting on placing them e.g. along an a priori defined principal axis. Three-dimensional spectroscopy at high spatial resolution is an ideal tool to study the central regions of nearby galaxies. Some illustrations of the progress made in that field using the TIGER and OASIS integral field spectrographs are given.