Faculty of Mathematics and Natural Sciences
University of Leiden
Niels Bohrweg 2
2333 CA Leiden
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Table of Contents
The cover of the Annual Report 2000
shows NGC 4365, an elliptical galaxy located in the Virgo cluster, known to
have a core and outer region that rotate around different axes. The
striking kinematical structure is illustrated in this recent picture,
obtained with the panoramic integral-field spectrograph SAURON in
March 2000. The left panel shows the derived intensity of the star light.
The right panel shows the stellar motions: blue indicates motion towards us
and red indicates motion away from us: the main body of NGC 4365 rotates
approximately around the projected major axis and the core rotates around
the projected minor axis.
SAURON was constructed by a collaboration which involves groups in Leiden (de Zeeuw), Lyon (Bacon) and Durham (Davies). It is mounted on the 4.2m William Herschel Telescope on la Palma, and provides 1577 spectra in one exposure. SAURON is being used to observe a representative sample of 72 nearby ellipticals, lenticulars and spiral bulges, which, combined with state-of-the-art dynamical models, will provide virtually complete insight into motions of stars of these galaxies.
Editors: H. Röttgering, Y. Slegtenhorst, K. Kol, R. Meijerink
Layout: W. Tschager
With thanks to: D. Jansen