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Measuring non-axisymmetry in spiral galaxies
R. H. M. Schoenmakers, M. Franx, P. T. de Zeeuw
We present a method for measuring small deviations from axisymmetry of the potential of a filled gas disk. The method is based on a higher order harmonic expansion of the full velo…
Improved evidence for a black hole in M32 from HST/FOS spectra - II. Axisymmetric dynamical models
R. P. van der Marel, N. Cretton, P. T. de Zeeuw +1
Axisymmetric dynamical models are constructed for the E3 galaxy M32 to interpret high spatial resolution stellar kinematical HST data. Models are studied with two-integral phase-sp…
Improved evidence for a black hole in M32 from HST/FOS spectra - I. Observations
R. P. van der Marel, P. T. de Zeeuw, H. W. Rix
We have obtained spectra through small apertures centered on the nuclear region and major axis of M32, with the HST/FOS. A detailed analysis and reduction of the data is presented,…
Dynamical Modeling of Velocity Profiles: The Dark Halo Around the Elliptical Galaxy NGC2434
Hans-Walter Rix, Tim de Zeeuw, Marcella Carollo +2
We describe a powerful technique to model and interpret the stellar line-of-sight velocity profiles of galaxies. Following Schwarzschild's modeling approach, a representative libra…
New evidence for a massive black hole at the centre of the quiescent galaxy M32
R. P. van der Marel, P. T. de Zeeuw, H. W. Rix +1
Massive black holes are thought to reside at the centres of many galaxies, where they power quasars and active galactic nuclei. But most galaxies are quiescent, indicating that any…