2009A&A...496..683M


Query : 2009A&A...496..683M

2009A&A...496..683M - Astronomy and Astrophysics, volume 496, 683-693 (2009/3-4)

The early-type dwarf galaxy population of the Centaurus cluster.

MISGELD I., HILKER M. and MIESKE S.

Abstract (from CDS):

We present a photometric study of the early-type dwarf galaxy population of the Centaurus cluster, aiming at investigating the galaxy luminosity function (LF) and galaxy scaling relations down to the regime of galaxies with MV~-10mag. On deep VLT/FORS1 V- and I-band images of the central part of the cluster, we identify cluster dwarf-galaxy candidates using both morphological and surface brightness selection criteria. Photometric and structural parameters of the candidates are derived from analysis of their surface brightness profiles. Fundamental scaling relations, such as the colour-magnitude and the magnitude-surface brightness relation, are used to distinguish the cluster from the background. We find a flat LF with a slope of α=-1.14±0.12 for MV>-14mag, when fitting a power law to the completeness-corrected galaxy number counts. Applying a Schechter function leads to a consistent result of α~-1.1. When plotting the central surface brightness of a Sersic model vs. the galaxy magnitude, we find a continuous relation for magnitudes -20<MV←10mag, with only the brightest core galaxies deviating from this relation, in agreement with previous studies of other clusters. Within our Centaurus dwarf galaxy sample we identify three very compact objects. We discuss whether they belong to the class of the so-called compact elliptical galaxies (cEs). In a size-luminosity diagram (Reff vs. MV) of early-type galaxies from a range of environments, we observe that Reff slowly decreases with decreasing luminosity for -21<MV←13mag and decreases more rapidly at fainter magnitudes. This trend continues to the ultra-faint Local Group dwarf galaxies (MV~-4mag). The continuous central surface brightness vs. absolute magnitude relation and the smooth relation in the size-luminosity diagram over a wide range of magnitudes are consistent with the interpretation of dwarf galaxies and more massive elliptical galaxies being one family of objects with gradually changing structural properties. The most massive core galaxies and the rare cE galaxies are the only exceptions.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Centaurus - galaxies: dwarf - galaxies: fundamental parameters - galaxies: luminosity function, mass function

VizieR on-line data: <Available at CDS (J/A+A/496/683): tablea2.dat>

Nomenclature: Table A.2: [MHM2009b] C-F-NN N=92.

CDS comments: In reflist Smith Castelli 2008 is 2008MNRAS.391..685S.

Simbad objects: 140

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Number of rows : 140
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Andromeda XVIII G 00 02 14.5 +45 05 20     16.0     ~ 106 0
2 NAME Andromeda XX G 00 07 30.70 +35 07 56.4     18.2     ~ 62 0
3 And XIX G 00 19 32.10 +35 02 37.1     15.6     ~ 124 0
4 NAME Andromeda III G 00 35 22.7 +36 30 17     14.4     ~ 281 0
5 M 32 IG 00 42 41.825 +40 51 54.61 9.51 9.03 8.08     ~ 2053 2
6 NAME Andromeda I G 00 45 39.8 +38 02 28   13.9 12.7     ~ 316 0
7 NAME Andromeda XI G 00 46 20.0 +33 48 05     17.5     ~ 109 0
8 NAME Andromeda XII G 00 47 27.0 +34 22 29     18.3     ~ 110 0
9 NAME Andromeda XIII G 00 51 51.0 +33 00 16     18.1     ~ 111 0
10 NAME Andromeda IX G 00 52 53.0 +43 11 45     16.3     ~ 156 1
11 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1198 4
12 NAME Andromeda X G 01 06 33.70 +44 48 15.8     16.6     ~ 107 1
13 NAME Andromeda V G 01 10 17.1 +47 37 41     15.3     ~ 195 0
14 NAME Andromeda II G 01 16 29.8 +33 25 09     11.7     ~ 357 0
15 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1639 0
16 LEDA 3084811 GiC 04 33 37.3 -13 15 18           ~ 15 0
17 NAME Carina dSph G 06 41 36.7 -50 57 58   22.14 11.0 19.47   ~ 1042 0
18 NAME UMa II Galaxy G 08 51 30.0 +63 07 48     13.3     ~ 333 0
19 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 387 1
20 NAME Leo I dSph G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1102 1
21 NAME Dwarf Elliptical Galaxy in Sex G 10 13 02.9 -01 36 53   12 10.4     ~ 758 0
22 ACO S 636 ClG 10 29 41.0957 -35 19 32.908           ~ 207 0
23 [FS90] Antlia 192 GiG 10 30 05.0674237364 -35 20 31.958869950   18.9   15.7 16.39 ~ 13 0
24 NAME UMa I Galaxy G 10 34 52.80 +51 55 12.0     14.4     ~ 286 1
25 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 792 1
26 NAME Willman 1 G 10 49 21.0 +51 03 00     15.2     ~ 274 0
27 NAME UMa Region reg 11 00 +50.0           ~ 318 0
28 NAME Leo B G 11 13 28.13 +22 09 10.1   12.9 12.0     ~ 773 0
29 NAME Leo IV Dwarf Galaxy G 11 32 57.0 -00 32 00     15.1     ~ 345 1
30 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 6102 0
31 NAME Coma Dwarf Galaxy G 12 26 59.0 +23 54 15     14.1     ~ 409 1
32 UGCA 283 GiG 12 30 31.985 +12 29 24.85   14.5       ~ 392 0
33 [MHM2009b] C-1-47 G 12 48 27.1 -41 17 35           ~ 2 0
34 [MHM2009b] C-5-88 G 12 48 28.3 -41 21 25           ~ 2 0
35 LEDA 2798836 GiC 12 48 30.00 -41 19 19.3           ~ 7 0
36 2MASX J12483106-4118226 GiC 12 48 31.062 -41 18 22.64   16 15.13 15.17   ~ 24 0
37 [MHM2009b] C-1-84 G 12 48 31.1 -41 15 34           ~ 2 0
38 [MHM2009b] C-7-56 G 12 48 32.6 -41 35 42           ~ 2 0
39 [MHM2009b] C-1-66 G 12 48 34.1 -41 21 21           ~ 2 0
40 LEDA 575633 GiC 12 48 36.08 -41 26 25.2     16.85     ~ 11 0
41 [MHM2009b] C-1-60 G 12 48 36.5 -41 18 37           ~ 2 0
42 [MHM2009b] C-1-78 G 12 48 37.6 -41 17 17           ~ 2 0
43 [MHM2009b] C-1-36 G 12 48 37.7 -41 19 49           ~ 2 0
44 LEDA 43280 G 12 48 39.6 -41 16 06           ~ 4 0
45 [MHM2009b] C-1-74 G 12 48 39.8 -41 17 00           ~ 2 0
46 [MHM2009b] C-1-86 G 12 48 40.0 -41 19 17           ~ 2 0
47 [MHM2009b] C-5-45 G 12 48 40.5 -41 24 20           ~ 2 0
48 [MHM2009b] C-1-38 G 12 48 40.7 -41 19 49           ~ 2 0
49 [MHM2009b] C-1-76 G 12 48 42.0 -41 18 03           ~ 2 0
50 [MHM2009b] C-7-87 G 12 48 42.4 -41 36 52           ~ 2 0
51 2MASX J12484344-4138376 GiG 12 48 43.4425143979 -41 38 37.253068134   15 14.05 14.07   ~ 17 0
52 [MHM2009b] C-1-42 G 12 48 45.0 -41 21 07           ~ 2 0
53 [MHM2009b] C-7-89 G 12 48 45.2 -41 36 57           ~ 2 0
54 [MHM2009b] C-6-70 G 12 48 45.5 -41 30 19           ~ 2 0
55 [MHM2009b] C-5-68 G 12 48 47.3 -41 22 05           ~ 2 0
56 [MHM2009b] C-5-53 G 12 48 47.4 -41 26 06           ~ 2 0
57 [MHM2009b] C-5-41 G 12 48 47.4 -41 23 20           ~ 2 0
58 [CM2006] J124848.56-412053.50 GiC 12 48 48.56 -41 20 53.5     17.78     ~ 3 0
59 NGC 4696 BiC 12 48 49.277 -41 18 39.92   11.21   10.7   ~ 460 3
60 [MHM2009b] C-5-81 G 12 48 49.6 -41 23 01           ~ 2 0
61 NAME Cen 30 ClG 12 48 51.7 -41 18 21           ~ 58 0
62 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 1002 2
63 [MHM2009b] C-5-52 G 12 48 52.3 -41 27 14           ~ 2 0
64 LEDA 2798844 GiC 12 48 52.49 -41 32 25.0           ~ 6 0
65 LEDA 43301 GiC 12 48 53.91 -41 19 05.8   16       ~ 15 0
66 [MHM2009b] C-6-62 G 12 48 59.3 -41 30 19           ~ 2 0
67 [MHM2009b] C-6-90 G 12 48 59.5 -41 32 02           ~ 2 0
68 [MHM2009b] C-1-46 G 12 49 00.3 -41 18 48           ~ 2 0
69 [MHM2009b] C-6-55 G 12 49 01.4 -41 30 18           ~ 2 0
70 LEDA 577429 GiC 12 49 01.91 -41 15 35.8     17.39     ~ 10 0
71 [MHM2009b] C-5-91 G 12 49 02.2 -41 22 47           ~ 2 0
72 [MHM2009b] C-7-44 G 12 49 02.6 -41 37 05           ~ 2 0
73 [MHM2009b] C-2-79 G 12 49 05.1 -41 16 41           ~ 2 0
74 LEDA 2798849 GiC 12 49 05.44 -41 18 26.8           ~ 4 0
75 LEDA 2798850 GiC 12 49 06.33 -41 16 13.8           ~ 4 0
76 [MHM2009b] C-2-82 G 12 49 06.9 -41 18 48           ~ 2 0
77 [MHM2009b] C-2-63 G 12 49 07.1 -41 19 38           ~ 2 0
78 [MHM2009b] C-2-61 G 12 49 08.2 -41 21 14           ~ 2 0
79 [MHM2009b] C-2-92 G 12 49 08.2 -41 18 08           ~ 2 0
80 [MHM2009b] C-2-35 G 12 49 13.2 -41 17 54           ~ 2 0
81 [MHM2009b] C-2-37 G 12 49 15.0 -41 17 11           ~ 2 0
82 2MASX J12491862-4120073 GiC 12 49 18.622 -41 20 07.38   15 15.28 15.44   ~ 25 0
83 [MHM2009b] C-2-34 G 12 49 20.9 -41 17 11           ~ 2 0
84 LEDA 2798856 GiC 12 49 22.69 -41 15 18.5     18.17     ~ 7 0
85 [MHM2009b] C-2-85 G 12 49 24.6 -41 15 15           ~ 2 0
86 [MHM2009b] C-2-83 G 12 49 25.0 -41 18 26           ~ 2 0
87 [MHM2009b] C-2-51 G 12 49 32.0 -41 17 19           ~ 2 0
88 CCC 101 GiC 12 49 32.17 -41 20 24.4           ~ 3 0
89 [BCS89] 65 GiC 12 49 33.0 -41 19 26           ~ 3 0
90 [MHM2009b] C-3-30 G 12 49 34.1 -41 22 36           ~ 2 0
91 [MHM2009b] C-3-49 G 12 49 35.9 -41 21 07           ~ 2 0
92 ESO 322-102 GiG 12 49 37.8465245110 -41 23 17.826236351   14.60 13.72 13.03   ~ 40 0
93 [MHM2009b] C-3-32 G 12 49 38.1 -41 23 56           ~ 2 0
94 [MHM2009b] C-4-39 G 12 49 38.8 -41 16 40           ~ 2 0
95 [MHM2009b] C-4-71 G 12 49 39.4 -41 12 21           ~ 2 0
96 LEDA 43379 GiC 12 49 40.01 -41 21 59.3   17.09 16.01     ~ 11 0
97 [MHM2009b] C-3-58 G 12 49 40.6 -41 21 05           ~ 2 0
98 [MHM2009b] C-3-77 G 12 49 41.5 -41 18 35           ~ 2 0
99 2MASX J12494194-4113446 GiC 12 49 41.946 -41 13 44.62     16.17     ~ 10 0
100 [MHM2009b] C-3-69 G 12 49 42.0 -41 21 33           ~ 2 0
101 [MHM2009b] C-4-75 G 12 49 42.8 -41 13 13           ~ 2 0
102 [MHM2009b] C-4-80 G 12 49 45.9 -41 14 53           ~ 2 0
103 [MHM2009b] C-4-33 G 12 49 46.0 -41 17 56           ~ 2 0
104 LEDA 2798867 GiC 12 49 46.54 -41 22 08.2           ~ 6 0
105 [MHM2009b] C-3-50 G 12 49 47.9 -41 22 04           ~ 2 0
106 LEDA 2798869 GiC 12 49 48.69 -41 14 19.1           ~ 4 0
107 2MASX J12495160-4113346 GiG 12 49 51.606 -41 13 34.62   14 13.69 13.54   ~ 32 0
108 LEDA 576636 GiC 12 49 54.16 -41 20 24.1           ~ 10 0
109 NGC 4706 GiG 12 49 54.1731133561 -41 16 45.672932766   14.00 13.50 12.39   ~ 57 0
110 [MHM2009b] C-3-67 G 12 49 54.7 -41 19 01           ~ 2 0
111 LEDA 576005 GiC 12 49 56.09 -41 24 04.0     17.33     ~ 11 0
112 [MHM2009b] C-4-29 G 12 49 56.1 -41 16 56           ~ 2 0
113 LEDA 2798871 GiC 12 49 56.19 -41 23 22.0           ~ 6 0
114 LEDA 43412 GiC 12 49 56.43 -41 15 37.0   17.20 16.20     ~ 11 0
115 [MHM2009b] C-3-59 G 12 49 57.9 -41 19 23           ~ 2 0
116 [MHM2009b] C-4-64 G 12 49 58.0 -41 15 12           ~ 2 0
117 [MHM2009b] C-3-73 G 12 49 59.6 -41 20 16           ~ 2 0
118 NAME Cen 45 GrG 12 50 -41.3           ~ 45 0
119 [MHM2009b] C-3-72 G 12 50 00.9 -41 21 33           ~ 2 0
120 [MHM2009b] C-3-43 G 12 50 00.9 -41 19 08           ~ 2 0
121 [MHM2009b] C-4-54 G 12 50 02.3 -41 12 48           ~ 2 0
122 [MHM2009b] C-3-40 G 12 50 02.7 -41 19 50           ~ 2 0
123 [MHM2009b] C-4-48 G 12 50 03.8 -41 11 37           ~ 2 0
124 NGC 4709 GiG 12 50 03.948 -41 22 55.46   12.48 11.32 10.89   ~ 118 0
125 [MHM2009b] C-4-57 G 12 50 05.1 -41 12 39           ~ 2 0
126 [MHM2009b] C-4-65 G 12 50 06.5 -41 13 40           ~ 2 0
127 MCG-07-26-057 GiC 12 50 07.7 -41 23 54   14       ~ 22 0
128 NAME CVn II dSph G 12 57 09.6 +34 19 12     16.1     ~ 227 2
129 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1052 0
130 NAME CVn I dSph G 13 28 03.5 +33 33 21     13.1     ~ 283 1
131 NAME Bootes II G 13 58 00.0 +12 51 00     15.4     ~ 207 0
132 NAME Bootes Dwarf Spheroidal Galaxy G 14 00 00.0 +14 30 00     12.8     ~ 370 0
133 ACO 1958 ClG 14 43 13 +30 58.3           ~ 53 0
134 MCG+00-38-026 GiP 15 06 29.199 +01 35 41.55   14.1 13.37 13.07 12.1 ~ 110 0
135 NAME UMi Galaxy G 15 09 11.34 +67 12 51.7   13.60 10.6     ~ 1239 0
136 ACO 2151 ClG 16 05 15.0 +17 44 55           ~ 564 3
137 NAME Dra dSph G 17 20 14.335 +57 55 16.39   12.40 10.6     ~ 1224 1
138 NAME Andromeda VII GiG 23 26 31.7 +50 40 33   13.6 11.8     ~ 189 1
139 NAME Peg dSph GiG 23 51 46.4 +24 35 11   14.5 13.2     ~ 224 2
140 NAME Local Group GrG ~ ~           ~ 7395 0

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2021.10.27-09:34:51

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