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Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365 | | R. C. E. van den Bosch
; G. van de Ven
; E. K. Verolme
; M. Cappellari
; P. T. de Zeeuw
; | | Date: |
Mon, 3 Dec 2007 19:12:40 GMT (1812kb) | | Abstract: | We present a flexible and efficient method to construct triaxial dynamical
models of galaxies with a central black hole, using Schwarzschild’s orbital
superposition approach. Our method is general and can deal with realistic
luminosity distributions, which project to surface brightness distributions
that may show position angle twists and ellipticity variations. The models are
fit to measurements of the full line-of-sight velocity distribution (wherever
available). We verify that our method is able to reproduce theoretical
predictions of a three-integral triaxial Abel model. In a companion paper (van
de Ven, de Zeeuw & van den Bosch), we demonstrate that the method recovers the
phase-space distribution function. We apply our method to two-dimensional
observations of the E3 galaxy NGC 4365, obtained with the integral-field
spectrograph SAURON, and study its internal structure, showing that the
observed kinematically decoupled core is not physically distinct from the main
body and the inner region is close to oblate axisymmetric. | | Source: | arXiv, 0712.0113 | | Services: | Forum | Review | PDF | Favorites | |
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