Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
| Autor: | E. K. Verolme, Michele Cappellari, R. C. E. van den Bosch, G. van de Ven, P. T. de Zeeuw |
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| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Physics
010308 nuclear & particles physics Astrophysics (astro-ph) FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Position angle 01 natural sciences Galaxy Luminosity Black hole Distribution function Space and Planetary Science 0103 physical sciences Orbit (dynamics) Surface brightness 010303 astronomy & astrophysics Schwarzschild radius Astrophysics::Galaxy Astrophysics |
| Zdroj: | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY. 385(2) |
| ISSN: | 1365-2966 0035-8711 |
| Popis: | 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. 21 Pages, 14 (Colour) Figures, Companion paper is arXiv:0712.0309 Accepted to MNRAS. Full resolution version at http://www.strw.leidenuniv.nl/~bosch/papers/RvdBosch_triaxmethod.pdf |
| Databáze: | OpenAIRE |
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