2000A&AS..144...53K


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.25CEST10:22:21

2000A&AS..144...53K - Astron. Astrophys., Suppl. Ser., 144, 53-84 (2000/May-2)

Orbital structure and mass distribution in elliptical galaxies.

KRONAWITTER A., SAGLIA R.P., GERHARD O. and BENDER R.

Abstract (from CDS):

We report on a homogeneous dynamical analysis of a sample of 21 round (17 E0/E1, 4 E2) elliptical galaxies. We present new kinematic data for eight of these galaxies and new photometry for one object. The remaining kinematic and photometric data and the required distance information are taken from the literature. The analysis uses non-parametric spherical models and takes into account line profile information as well as velocity dispersions. We present model fits to the kinematic data and the derived radial profiles of orbital anisotropy and B-band mass-to-light ratio, including confidence intervals. The circular velocity curves resulting from our model fits are all consistent with being flat outside R≃0.3Re. Generally, the M/L ratio profiles show an outward increase, although models based on luminous matter are ruled out at 95% confidence only for three galaxies (NGC 2434, NGC 7507, NGC 7626). For NGC 1399, NGC 4472, NGC 4486, and NGC 4636, where X-ray observations are available, the mass profiles of the best fit models match the ones derived from the X-ray analysis. The best models for most galaxies are isotropic to slightly radially anisotropic, with typical β≲0.3, in a few cases β≲0.5 at Re/2. We discuss the generally small effects of flattening along the line-of-sight (the expected <c/a≥0.79 for this sample of luminous ellipticals) and of small embedded disks. Our results suggest that elliptical galaxies have surprisingly uniform dynamical properties.

Abstract Copyright:

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters, kinematics and dynamics, photometry, structure

Simbad objects: 24

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Number of rows : 24

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 1960 2
2 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 10505 1
3 NGC 315 LIN 00 57 48.88335 +30 21 08.8122 12.80 12.20 11.16 11.26   ~ 677 2
4 NGC 1399 BiC 03 38 29.083 -35 27 02.67 11.05 9.74 9.59 8.12   ~ 1407 1
5 NGC 2434 GiG 07 34 51.1487209121 -69 17 03.008825858 12.82 12.50 11.26 10.84   ~ 171 1
6 NGC 3193 GiP 10 18 24.884 +21 53 38.32 12.29 11.83 10.88 12.19   ~ 263 1
7 M 105 LIN 10 47 49.600 +12 34 53.87   10.56 9.76 9.12 8.18 ~ 1359 0
8 NGC 3640 GiG 11 21 06.852 +03 14 05.15 11.89 11.36 10.44     ~ 248 3
9 NGC 4168 Sy1 12 12 17.234 +13 12 19.27 12.58 12.11 11.18     ~ 347 2
10 NGC 4278 LIN 12 20 06.82563 +29 16 50.7124 11.54 11.09 10.16     ~ 870 2
11 M 84 Sy2 12 25 03.74333 +12 53 13.1393 12.67 12.09 10.49     ~ 1602 2
12 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 1916 2
13 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 369 0
14 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 5991 3
15 NGC 4494 GiP 12 31 24.034 +25 46 29.93   10.55 9.74     ~ 441 0
16 NGC 4589 LIN 12 37 25.0 +74 11 31   12.0       ~ 255 1
17 NAME NGC 4636 Group GrG 12 42 49.5 +02 41 08           ~ 546 0
18 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1021 1
19 NGC 5846 BiC 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 750 1
20 NGC 6703 G 18 47 18.8165361086 +45 33 02.284879274   12.29 11.34     ~ 199 0
21 NGC 7145 GiG 21 53 20.237 -47 52 56.96   12.13 11.23 10.77   ~ 105 0
22 NGC 7192 GiG 22 06 50.178 -64 18 58.38   12.21 11.21 10.77   ~ 130 0
23 NGC 7507 GiG 23 12 07.595 -28 32 22.70   11.60   9.98   ~ 162 0
24 NGC 7626 rG 23 20 42.524 +08 13 01.43   12.8       ~ 395 1

    Equat.    Gal    SGal    Ecl

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2019.08.25-10:22:21

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