2005A&A...434..109A


Query : 2005A&A...434..109A

2005A&A...434..109A - Astronomy and Astrophysics, volume 434, 109-122 (2005/4-4)

Photometric properties and origin of bulges in SB0 galaxies.

AGUERRI J.A.L., ELIAS-ROSA N., CORSINI E.M. and MUNOZ-TUNON C.

Abstract (from CDS):

We have derived the photometric parameters for the structural components of a sample of fourteen SB0 galaxies by applying a parametric photometric decomposition to their observed I-band surface brightness distribution. We find that SB0 bulges are similar to bulges of the early-type unbarred spirals, i.e. they have nearly exponential surface brightness profiles (<n≥1.48±0.16) and their effective radii are strongly coupled to the scale lengths of their surrounding discs (<re/h≥0.20±0.01). The photometric analysis alone does not allow us to differentiate SB0 bulges from unbarred S0 ones. However, three sample bulges have disc properties typical of pseudobulges. The bulges of NGC 1308 and NGC 4340 rotate faster than bulges of unbarred galaxies and models of isotropic oblate spheroids with equal ellipticity. The bulge of IC 874 has a velocity dispersion lower than expected from the Faber-Jackson correlation and the fundamental plane of the elliptical galaxies and S0 bulges. The remaining sample bulges are classical bulges, and are kinematically similar to lower-luminosity ellipticals. In particular, they follow the Faber-Jackson correlation, lie on the fundamental plane and those for which stellar kinematics are available rotate as fast as the bulges of unbarred galaxies.

Abstract Copyright:

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

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 357 GiC 01 03 21.8777769984 -06 20 21.083951004   12   11.62   ~ 65 0
2 NGC 364 LIN 01 04 40.8307468896 -00 48 09.890173044   14.6       ~ 56 0
3 NGC 936 GiP 02 27 37.462 -01 09 22.61   11.1   9.98 10.7 ~ 343 0
4 NGC 1023 IG 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 630 2
5 NGC 1308 GiG 03 22 28.5393042168 -02 45 25.756786872   15   13.04   ~ 23 0
6 NGC 1440 GiG 03 45 02.9199469080 -18 15 57.720365172   12.48   10.77   ~ 75 0
7 NGC 2950 G 09 42 35.1484995048 +58 51 04.584956904   11.8       ~ 195 0
8 NGC 3412 GiG 10 50 53.2803559464 +13 24 43.721664876 11.84 11.45 10.54     ~ 227 1
9 NGC 3941 Sy2 11 52 55.3609498656 +36 59 10.716212904   11.45 11.62 9.97   ~ 235 0
10 NGC 4340 GiP 12 23 35.2816311336 +16 43 20.443217952   12.4       ~ 267 0
11 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4502 2
12 ESO 508-39 G 13 18 24.1 -27 25 58   16.05   15.40   ~ 14 0
13 IC 874 G 13 19 00.5211544464 -27 37 42.922967196   13.46   12.32   ~ 47 0
14 ESO 139-9 G 17 36 05.8920781128 -61 53 54.704613804   14.44   13.25   ~ 23 0
15 NGC 6684 GiG 18 48 57.8758832976 -65 10 24.324323808   11.34 10.45 9.94   ~ 111 4
16 IC 4796 GiG 18 56 27.8694381672 -54 12 50.476379220   13.48   11.97   ~ 25 0
17 NGC 7079 GiG 21 32 35.2418074440 -44 04 03.412507188   12.63 11.61 11.08   ~ 117 0

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2022.05.24-12:04:41

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