2004MNRAS.349..440D

Query : 2004MNRAS.349..440D

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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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
2 HD 21019 PM* 03 23 17.7011620632 -07 47 38.755366656   6.92 6.23     G5/6V 168 0
3 HD 29065 PM* 04 34 11.7698900760 -08 58 12.919690308   6.704 5.229     K3III 54 0
4 HD 44951 PM* 06 24 10.3194109992 -11 31 48.315467532   6.434 5.207     K2III 73 0
5 NGC 3257 GiG 10 28 47.1211653816 -35 39 29.380364640   14.05 12.54 12.53   ~ 50 0
6 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 200 0
7 NGC 3260 GiG 10 29 06.3956235984 -35 35 42.453138552   13.72 14.39 12.11   ~ 58 0
8 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
9 NGC 3377 GiP 10 47 42.400 +13 59 08.30 11.55 11.24 10.38     ~ 798 1
10 HD 93655 * 10 48 40.5554431800 -01 57 32.024546604 9.47 7.53 5.93     M1III 31 0
11 * eps Crt * 11 24 36.5912121144 -10 51 33.575503752   6.338 4.802     K4III 95 0
12 * zet Crt ** 11 44 45.7759757256 -18 21 02.434939560   5.677 4.706     G8.5III 102 0
13 * 49 Vir * 13 07 53.8128711672 -10 44 25.471334544   6.281 5.151     K0.5IIIbFe-0.5 92 0
14 * 61 Vir PM* 13 18 24.3139864471 -18 18 40.297748582 5.710 5.440 4.740     G6.5V 742 1
15 * h Vir PM* 13 32 58.0715920586 -10 09 53.995068424   6.19 5.21     G8III 90 0
16 HD 129902 PM* 14 45 11.7072695328 -01 25 03.108780372 9.62 7.68 6.07     M1III 39 0

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