SIMBAD references

2004MNRAS.349..440D - Mon. Not. R. Astron. Soc., 349, 440-460 (2004/April-1)

Modelling galactic spectra - I. A dynamical model for NGC 3258.

DE BRUYNE V., DE RIJCKE S., DEJONGHE H. and ZEILINGER W.W.

Abstract (from CDS):

We present a method to analyse absorption-line spectra of a galaxy designed to determine the stellar dynamics and the stellar populations by a direct fit to the spectra. This paper is the first to report on the application of the method to data. The modelling results in the knowledge of distribution functions that are sums of basis functions. The practical implementation of the method is discussed and a new type of basis function is introduced.

With this method, a dynamical model for NGC 3258 is constructed. This galaxy can be modelled successfully with a potential containing 30 per cent dark matter within 1rewith a mass of 1.6x1011 M☉. The total mass within 2reis estimated as 5x1011 M☉, containing 63 per cent dark matter. The model is isotropic in the centre, is radially anisotropic between 0.2 and 2 kpc (0.88re), and becomes tangentially anisotropic further on. The photometry reveals the presence of a dust disc near the centre.


Abstract Copyright: 2004 RAS

Journal keyword(s): methods: numerical - methods: statistical - galaxies: elliptical and lenticular, cD - galaxies: individual: NGC 3258 - galaxies: kinematics and dynamics - galaxies: structure

Simbad objects: 16

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