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BEGIN:VEVENT
DTSTART;TZID=Atlantic/Canary:20100921T000000
DTEND;TZID=Atlantic/Canary:20100921T010000
UID:iactalks-213
X-WR-CALNAME: IAC Talks: Open Astronomy Seminars
X-ORIGINAL-URL: /iactalks/Talks/view/213
CREATED:2010-09-21T00:00:00+01:00
X-WR-CALDESC: IAC Talks upcomming talks
SUMMARY:Dynamics of galaxies and globular clusters unraveled with two-dimen
 sional kinematics
DESCRIPTION:Dynamics of galaxies and globular clusters unraveled with two-d
 imensional kinematics\nDr. Glenn van  van de Ven\n\nTwo-dimensional stella
 r kinematics obtained with the integral-field spectrograph SAURON allow th
 e classification of early-type galaxies into 'slow' and 'fast' rotators, d
 ifferent from their morphological classification into ellipticals and lent
 iculars. Most fast rotators, including lenticular as well as many elliptic
 al galaxies, are consistent with oblate axisymmetric disk-like systems. On
  the other hand, the slow-rotator ellipticals show clear deviations from a
 xisymmetry, which can be modeled with our extension of Schwarzschild's orb
 it superposition method to triaxial geometry. Besides galaxies, I show tha
 t Schwarzschild's method can also be used to model in detail globular clus
 ters such as ω Cen and M15. The recovered internal orbital structure
  of ω Cen reveals besides a signature of tidal interaction, also a c
 entral stellar disk, supporting its origin as the nucleus of a stripped dw
 arf galaxy. The formally best-fit Schwarzschild model for M15 includes an 
 intermediate-mass black hole, but we cannot exclude a model in which dark 
 remnants make up the dark mass in the collapsed core.
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