2004MNRAS.349..461D

Query : 2004MNRAS.349..461D

2004MNRAS.349..461D - Mon. Not. R. Astron. Soc., 349, 461-475 (2004/April-1)

Modelling galactic spectra - II. Simultaneous study of stellar dynamics and stellar mix in NGC 3258.

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

Abstract (from CDS):

In this paper we adopt a method to analyse absorption-line spectra from elliptical galaxies that determines the dynamics of the galaxy and at the same time offers a way to study the stellar populations in that galaxy by a direct fit to the spectra. The result of the modelling is a distribution function for each stellar population that is considered in the fit. The method is described in detail in the accompanying paper.

This paper reports on a dynamical stellar population study in NGC 3258, based on spectra in two different wavelength regions, the near-infrared Ca ii triplet around 8600 Å and the Ca H and K lines around 3900 Å. These absorption lines have discriminating power towards various stellar types. The dynamical model shows an increase in dwarfs (represented by G2V stars) towards the centre. Most of the rotation in the model is delivered by the giants (represented by M1III stars). Moreover, the different models that were considered indicate that establishing a potential for a galaxy is dependent on the wavelength range used for the modelling.


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 HD 21019 PM* 03 23 17.7011620632 -07 47 38.755366656   6.92 6.23     G5/6V 168 0
2 HD 29065 PM* 04 34 11.7698900760 -08 58 12.919690308   6.704 5.229     K3III 54 0
3 HD 44951 PM* 06 24 10.3194109992 -11 31 48.315467532   6.434 5.207     K2III 73 0
4 NGC 3257 GiG 10 28 47.1211653816 -35 39 29.380364640   14.05 12.54 12.53   ~ 50 0
5 NGC 3258 EmG 10 28 53.588 -35 36 19.98   12.50 11.72 10.86   ~ 200 0
6 NGC 3260 GiG 10 29 06.3956235984 -35 35 42.453138552   13.72 14.39 12.11   ~ 58 0
7 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 248 0
8 HD 93655 * 10 48 40.5554431800 -01 57 32.024546604 9.47 7.53 5.93     M1III 31 0
9 * eps Crt * 11 24 36.5912121144 -10 51 33.575503752   6.338 4.802     K4III 95 0
10 * zet Crt ** 11 44 45.7759757256 -18 21 02.434939560   5.677 4.706     G8.5III 102 0
11 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
12 * 49 Vir * 13 07 53.8128711672 -10 44 25.471334544   6.281 5.151     K0.5IIIbFe-0.5 92 0
13 * 61 Vir PM* 13 18 24.3139864471 -18 18 40.297748582 5.710 5.440 4.740     G6.5V 742 1
14 * h Vir PM* 13 32 58.0715920586 -10 09 53.995068424   6.19 5.21     G8III 90 0
15 HD 129902 PM* 14 45 11.7072695328 -01 25 03.108780372 9.62 7.68 6.07     M1III 39 0
16 NGC 7052 rG 21 18 33.0441963648 +26 26 49.174586196 15.52 14.85 13.09     ~ 348 1

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