2012MNRAS.420.3427B

Query : 2012MNRAS.420.3427B

2012MNRAS.420.3427B - Mon. Not. R. Astron. Soc., 420, 3427-3450 (2012/March-2)

Evolutionary properties of the low-luminosity galaxy population in the NGC 5044 group.

BUZZONI A., CELLONE S.A., SARACCO P. and ZUCCA E.

Abstract (from CDS):

In this third paper of a series we present Johnson–Gunn B, g, V, r, i, z multicolour photometry for 79 objects, including a significant fraction of the faintest galaxies around NGC 5044, assessing group membership on the basis of apparent morphology (through accurate Sérsic-profile fitting) and low-resolution (R= 500–1000) optical spectroscopy to estimate the redshift for 21 objects.

Early- and late-type systems are found to be clearly separate in Sérsic parameter space, with the well-known luminosity versus shape relation being mostly traced by different morphological types spanning different ranges in the shape parameter n. A significantly blue colour is confirmed for Magellanic irregulars (Sm/Ims), while a drift toward bluer integrated colours is also an issue for dwarf ellipticals (dEs). Both features point to moderate but pervasive star-formation activity even among nominally `quiescent' stellar systems. Together, dEs and Ims provide the bulk of the galaxy luminosity function, around M(g) ≃ -18.0±1.5, while the S0 and dwarf spheroidal (dSph) components dominate the bright and faint-end tails of the distribution respectively. This special mix places the NGC 5044 Group just `midway' between the high-density cosmic aggregation scale typical of galaxy clusters and the low-density environment of looser galaxy clumps like our Local Group. The bright mass of the 136 member galaxies with available photometry and morphological classification, as inferred from appropriate M/L model fitting, amounts to a total of 2.3 {x} 1012 M☉. This is one seventh of the total dynamical mass of the group, according to its X-ray emission. The current star-formation rate within the group turns to be about 23 M☉/yr, a figure that may however be slightly increased as a result of the evident activity among dwarf ellipticals, as shown by enhanced Hβ emission in their spectra.

Lick narrow-band indices have been computed for 17 galaxies, probing all the relevant atomic and molecular features in the 4300–5800 Å wavelength range. Dwarf ellipticals are found to share a subsolar metallicity (-1.0 ≲ [Fe/H] ≲ - 0.5), with a clear decoupling between iron and α elements, as already established for high-mass systems. Both dEs and dS0s are consistent with a high age, about one Hubble time, although a possible bias towards higher values of age may be induced by the gas emission affecting the Hβ strength.


Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): galaxies: clusters: individual: NGC 5044 Group - galaxies: dwarf - galaxies: elliptical and lenticular, cD - galaxies: fundamental parameters - galaxies: photometry

Simbad objects: 180

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Number of rows : 180
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 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
2 ACO S 373 ClG 03 38 29.4 -35 27 08           ~ 2029 0
3 Mrk 116 AGN 09 34 02.1 +55 14 25           ~ 1179 1
4 MCG-03-33-031 EmG 13 05 15.57 -16 53 17.6   15.27   14.51   ~ 27 0
5 [BFK2006] GEMS-N5044-5 GiG 13 05 37.27 -15 46 58.5           ~ 3 0
6 LEDA 45518 AG? 13 08 06.38 -14 46 36.5           ~ 6 0
7 LEDA 91258 AG? 13 08 13.90 -16 14 21.0   16.4       ~ 15 0
8 LEDA 896031 EmG 13 08 54.770 -16 36 10.67   16.52   15.42   ~ 8 0
9 6dFGS gJ130916.7-165312 LSB 13 09 16.717 -16 53 11.60   16.72   15.52   ~ 11 0
10 MCG-03-34-004 EmG 13 09 44.0874273960 -16 36 07.742045124   13.87   12.89 13.3 ~ 54 0
11 LEDA 3803344 G 13 09 53.5166632608 -16 31 01.039916856       17.17   ~ 8 0
12 LEDA 900168 AG? 13 10 09.5289395880 -16 16 45.363840096           ~ 6 0
13 MCG-03-34-008 GiG 13 10 24.8933385624 -16 55 57.911510748   14   13.06   ~ 29 0
14 [BFK2006] GEMS-N5044-7 GiG 13 10 59.34 -15 20 44.3           ~ 3 0
15 6dFGS gJ131115.0-180610 AG? 13 11 15.03 -18 06 09.6   16.61   15.75   ~ 5 0
16 [KKF2008] GEMS-N5044-18 GiG 13 11 33.10 -14 40 39.8           ~ 4 0
17 NGC 5006 EmG 13 11 45.7713514368 -19 15 42.466312620   13.33   11.89   ~ 42 0
18 ESO 576-7 EmG 13 11 47.040 -18 47 31.20   15.93   15.02   ~ 12 0
19 LEDA 894102 AG? 13 11 58.4863267536 -16 44 54.062608848   15.62   14.39   ~ 11 0
20 LEDA 83784 GiG 13 12 13.80 -16 57 22.0   18.4       ~ 6 0
21 NGC 5010 GiG 13 12 26.331 -15 47 52.64   14.3       ~ 85 0
22 MCG-03-34-014 EmG 13 12 35.435 -17 32 32.61   13.14   12.9 12.2 ~ 78 0
23 NGC 5017 GiG 13 12 54.5176056816 -16 45 56.864317068   13.2   12.49   ~ 72 0
24 LEDA 83789 GiG 13 12 56.1 -16 49 22   19.2       ~ 5 0
25 MCG-03-34-019 GiG 13 13 05.4955444800 -16 28 41.305830096   14.5   13.32   ~ 29 0
26 LEDA 83792 GiG 13 13 06.80 -16 41 00.0   18.9       ~ 7 0
27 MCG-03-34-020 EmG 13 13 12.4856028144 -16 07 49.822977036   14.7   13.83 13.6 ~ 31 0
28 [FS90] NGC 5044 16 GiG 13 13 25 -16 08.2   19.4       ~ 2 0
29 6dFGS gJ131328.4-161853 GiG 13 13 28.42 -16 18 52.9   15.6       ~ 14 0
30 MCG-03-34-022 GiG 13 13 32.2282403640 -17 04 43.155462324   14.3   12.75   ~ 26 0
31 LEDA 83799 GiG 13 13 33.6 -17 03 47   17.7       ~ 6 0
32 MCG-02-34-010 GiG 13 13 34.332 -15 25 55.41   13.71   12.49 12.4 ~ 46 0
33 LEDA 83800 GiG 13 13 36.00 -16 16 58.0   18.9       ~ 7 0
34 LEDA 83802 GiG 13 13 43.10 -16 29 58.0   18.9       ~ 6 0
35 LEDA 881995 EmG 13 13 50.08 -17 30 47.8   16.80   16.01   ~ 9 0
36 LEDA 83804 GiG 13 13 50.96 -16 05 13.7   17.2       ~ 8 0
37 [FS90] NGC 5044 25 GiG 13 13 54 -17 00.7   19.0       ~ 2 0
38 NGC 5030 GiP 13 13 54.1559047032 -16 29 27.401507844   14.2   12.44   ~ 36 0
39 2MASS J13135471-1627087 * 13 13 54.7109206800 -16 27 08.663123160   18.9       ~ 3 0
40 6dFGS gJ131356.2-161624 GiG 13 13 56.228 -16 16 24.42   15.5       ~ 21 0
41 2MASXI J1313594-162303 GiP 13 13 59.52 -16 23 03.8   15.7       ~ 13 0
42 LEDA 83818 GiG 13 14 00.3 -16 47 08   16.3       ~ 7 0
43 LEDA 83810 GiG 13 14 00.47 -16 00 44.2   17.0       ~ 8 0
44 NGC 5031 GiG 13 14 03.1971389328 -16 07 23.049013008   14.0   12.76   ~ 37 0
45 LEDA 83811 G 13 14 05.4 -15 55 39   18.2       ~ 6 0
46 LEDA 83813 GiG 13 14 07.38048 -16 25 36.3828   16.6       ~ 13 0
47 [BFK2006] GEMS-N5044-1 GiG 13 14 09.930 -16 41 41.60           ~ 4 0
48 LEDA 83814 G 13 14 12.3 -16 28 58           ~ 5 0
49 6dFGS gJ131413.1-161115 G 13 14 13.0474654776 -16 11 14.788900788   17.79       ~ 7 0
50 2MASX J13141323-1619288 GiG 13 14 13.2476924664 -16 19 29.017107984   17.3       ~ 7 0
51 LEDA 83819 GiG 13 14 16.70 -16 33 24.0   18.8       ~ 6 0
52 6dFGS gJ131417.3-162619 GiG 13 14 17.333 -16 26 18.91   15.9       ~ 15 0
53 [FS90] NGC 5044 46A GiG 13 14 19.1 -16 17 32           ~ 1 0
54 [CB2005] B1 G 13 14 19.7 -16 10 30           ~ 2 0
55 LEDA 83823 GiG 13 14 20.0 -15 53 01   18.9       ~ 5 0
56 NAME NGC 5044 Group GrG 13 14 22.7 -16 32 04           ~ 186 0
57 LEDA 83824 G 13 14 25.5 -16 17 51   17.99       ~ 5 0
58 LEDA 83826 GiG 13 14 30.3 -16 51 54   19.7       ~ 4 0
59 [FS90] NGC 5044 49A GiG 13 14 30.4 -16 24 30           ~ 3 0
60 MCG-03-34-025 EmG 13 14 30.4225918704 -17 32 00.715922916   15   14.15   ~ 20 0
61 LEDA 83827 GiG 13 14 31.23 -16 22 47.6   15.4       ~ 16 0
62 6dFGS gJ131434.9-162929 GiG 13 14 34.8649708152 -16 29 28.782962196   15.8       ~ 17 0
63 LEDA 83830 GiG 13 14 35.84 -16 34 50.4   16.5       ~ 9 0
64 LEDA 83829 G 13 14 36.8 -16 07 56   19.3       ~ 5 0
65 2MASX J13143919-1550359 GiG 13 14 39.2265085632 -15 50 36.076211016   16.2       ~ 7 0
66 LEDA 83832 GiG 13 14 39.40 -16 10 04.0   16.7       ~ 8 0
67 FSG V-55 GiG 13 14 41 -16 29.1   19.3       ~ 4 0
68 LEDA 83835 GiG 13 14 42.7 -16 08 04   19.3       ~ 4 0
69 [FS90] NGC 5044 54A LSB 13 14 42.8 -16 11 18           ~ 2 0
70 LEDA 83837 GiG 13 14 43.54 -16 22 54.9   18.8       ~ 5 0
71 LEDA 83836 GiG 13 14 43.61 -15 51 34.4   18.8       ~ 7 0
72 LEDA 83839 GiG 13 14 45.5 -16 39 54   18.9       ~ 4 0
73 LEDA 83840 GiG 13 14 47.7 -16 07 44   18.9       ~ 5 0
74 LEDA 83841 G 13 14 47.9 -16 17 51   19.5       ~ 5 0
75 [FS90] NGC 5044 64A LSB 13 14 48.9 -16 30 30           ~ 2 0
76 NGC 5035 GiG 13 14 49.2353312592 -16 29 33.467307612   13.9   12.43   ~ 39 0
77 LEDA 83842 GiG 13 14 49.82 -16 58 24.2   15.2       ~ 13 0
78 [FS90] NGC 5044 72A GiG 13 14 51.8 -15 56 28           ~ 1 0
79 FSG V-66 GiG 13 14 53 -16 32.8   16.7       ~ 4 0
80 LEDA 83845 GiG 13 14 56.5 -16 32 06   19.3       ~ 4 0
81 [FS90] NGC 5044 70A LSB 13 14 56.7 -15 52 31           ~ 2 0
82 NGC 5037 GiP 13 14 59.381 -16 35 25.16   13.0   11.78   ~ 67 0
83 LEDA 83846 GiG 13 14 59.40 -15 53 57.0   17.4       ~ 7 0
84 LEDA 83847 GiG 13 14 59.80 -16 46 15.0   18.7       ~ 6 0
85 [CB2005] B2 G 13 15 01.9 -16 22 16           ~ 2 0
86 NGC 5038 GiG 13 15 02.135 -15 57 06.16   13.9   13.01   ~ 53 0
87 2MASX J13150244-1635481 GiG 13 15 02.4846692352 -16 35 48.740314776   16.7       ~ 4 0
88 6dFGS gJ131504.1-162339 GiG 13 15 04.0679474352 -16 23 39.525049536   15.9       ~ 18 0
89 LEDA 83849 GiG 13 15 04.1 -16 18 03   19.3       ~ 3 0
90 LEDA 83850 GiG 13 15 04.4 -16 48 44   19.4       ~ 4 0
91 2MASX J13150513-1620451 GiG 13 15 05.0953116624 -16 20 45.525211368   16.93 15.44     ~ 17 0
92 LEDA 83854 GiG 13 15 09.8 -16 07 50   19.7       ~ 3 0
93 6dFGS gJ131510.5-161419 GiG 13 15 10.5384551880 -16 14 19.094774424   15.0       ~ 19 0
94 [FS90] NGC 5044 80A GiG 13 15 11.8 -16 59 48           ~ 1 0
95 [FS90] NGC 5044 79 GiG 13 15 12.71 -16 29 57.1   16.1       ~ 4 0
96 MCG-03-34-032 AG? 13 15 12.781 -17 58 00.67   14.75   13.99 14.2 ~ 45 0
97 LEDA 83857 GiG 13 15 13.6 -16 58 12   18.6       ~ 3 0
98 LEDA 83858 GiG 13 15 14.3 -15 50 59   19.1       ~ 6 0
99 MCG-03-34-033 GiG 13 15 17.5678548696 -16 29 09.914225028   14.7   13.56   ~ 20 0
100 LEDA 83860 GiG 13 15 21.60 -16 36 08.0   17.4       ~ 10 0
101 LEDA 83861 GiG 13 15 23.1 -16 27 46   19.1       ~ 3 0
102 [FS90] NGC 5044 82A GiG 13 15 23.4 -16 27 18           ~ 1 0
103 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 531 0
104 LEDA 83863 GiG 13 15 25.4 -16 01 35   19.1       ~ 4 0
105 [FS90] NGC 5044 83A GiG 13 15 26.3 -16 34 01           ~ 3 0
106 LEDA 83865 GiG 13 15 27.5 -16 11 20   18.4       ~ 5 0
107 LEDA 83866 G 13 15 27.8 -16 11 41   19.0       ~ 6 0
108 LEDA 83867 GiG 13 15 29.0 -16 14 35   19.8       ~ 3 0
109 [FS90] NGC 5044 93B LSB 13 15 30.9 -16 19 22           ~ 2 0
110 [FS90] NGC 5044 93 GiG 13 15 32 -16 17.1   18.3       ~ 3 0
111 6dFGS gJ131532.0-162851 GiP 13 15 32.0544340008 -16 28 51.450788028   15.8       ~ 15 0
112 LEDA 83871 GiG 13 15 32.40 -16 38 12.0   18.8       ~ 9 0
113 LEDA 83872 GiG 13 15 32.70 -16 50 35.0   18.5       ~ 6 0
114 [FS90] NGC 5044 94A GiG 13 15 34.2 -16 30 36           ~ 1 0
115 [FS90] NGC 5044 93C LSB 13 15 35.9 -16 18 43           ~ 2 0
116 [FS90] NGC 5044 93A LSB 13 15 36.9 -16 19 22           ~ 3 0
117 2MASX J13153736-1452209 GiG 13 15 37.3887745152 -14 52 21.169285428   15.46   14.16   ~ 18 0
118 [FS90] NGC 5044 95A GiG 13 15 38.6 -16 38 27           ~ 4 0
119 [FS90] NGC 5044 94B GiG 13 15 39.7 -16 29 56           ~ 1 0
120 LEDA 83875 GiG 13 15 42.0 -16 34 08   19.7       ~ 5 0
121 NGC 5046 GiG 13 15 45.1136847696 -16 19 36.427404972   14.3   13.24   ~ 30 0
122 NGC 5047 GiP 13 15 48.4943053680 -16 31 07.822979652   13.7   12.40   ~ 37 0
123 LEDA 83878 GiG 13 15 52.1 -16 28 21   19.2       ~ 3 0
124 LEDA 83879 GiG 13 15 53.7 -16 15 23   18.9       ~ 3 0
125 LEDA 83880 GiG 13 15 56.80 -16 16 10.0   19.0       ~ 6 0
126 NGC 5049 EmG 13 15 59.3023632720 -16 23 49.627236084   13.8   12.89   ~ 47 0
127 2MASXI J1315597-161028 GiG 13 15 59.92 -16 10 31.6   17.4       ~ 5 0
128 2MASX J13160747-1700080 G 13 16 07.4587797144 -17 00 07.943891904           ~ 3 0
129 LEDA 83884 G 13 16 08.1 -16 59 47   18.0       ~ 6 0
130 LEDA 83886 GiG 13 16 13.0 -16 26 41   18.8       ~ 3 0
131 [FS90] NGC 5044 113 GiG 13 16 14 -16 19.0   19.0       ~ 2 0
132 LEDA 83889 GiG 13 16 19.70 -16 08 30.0   19.0       ~ 6 0
133 6dFGS gJ131623.1-160811 GiG 13 16 23.0928395304 -16 08 11.059621440   15.8       ~ 11 0
134 FSG V-122 GiG 13 16 31 -16 02.0   18.4       ~ 4 0
135 LEDA 83895 GiG 13 16 31.30 -16 40 40.0   18.6       ~ 6 0
136 LEDA 83896 GiG 13 16 35.62 -16 26 05.7   18.3       ~ 6 0
137 LEDA 83897 G 13 16 35.8 -15 57 07   18.7       ~ 6 0
138 LEDA 83898 GiG 13 16 37.4 -16 14 07   19.1       ~ 3 0
139 LEDA 83900 GiG 13 16 39.40 -16 57 03.0   18.6       ~ 7 0
140 LEDA 83902 GiG 13 16 39.8 -16 23 24   19.0       ~ 3 0
141 2MASX J13164875-1620397 GiP 13 16 48.7308496776 -16 20 39.463437444   15.80   14.57   ~ 21 0
142 ESO 576-21 AG? 13 16 53.2 -17 53 56   16.05   15.43   ~ 10 0
143 LEDA 83910 GiG 13 16 54.40 -16 03 18.0   18.6       ~ 7 0
144 ESO 576-22 EmG 13 16 55.3634881608 -17 56 42.223572816   15.31   14.07   ~ 13 0
145 LEDA 83909 GiP 13 16 55.43 -16 26 32.2   18.6       ~ 8 0
146 MCG-03-34-040 EmG 13 16 56.243 -16 35 34.79   15.1   14.62   ~ 24 0
147 2MASX J13165667-1618447 G 13 16 56.6796918576 -16 18 44.777117700   18.3       ~ 7 0
148 NGC 5054 Sy1 13 16 58.488 -16 38 05.46   11.3   10.36 10.7 ~ 203 1
149 LEDA 83913 GiG 13 17 03.0 -16 35 38   19.0       ~ 7 0
150 [FS90] NGC 5044 139 GiG 13 17 04 -15 41.7   16.5       ~ 3 0
151 MCG-03-34-041 GiP 13 17 06.119 -16 15 07.80   13.5   13.45   ~ 64 0
152 LEDA 83916 GiG 13 17 07.4 -16 45 09   18.5       ~ 3 0
153 MCG-03-34-042 GiP 13 17 10.7734682256 -16 13 46.402236444   14.8   14.09   ~ 18 0
154 IC 863 EmG 13 17 12.4025383728 -17 15 16.053508008   14.24   13.17   ~ 61 0
155 LEDA 83919 GiG 13 17 14.00 -16 59 59.0   19.1       ~ 6 0
156 LEDA 83920 GiG 13 17 16.8 -16 11 47   19.2       ~ 4 0
157 LEDA 83923 GiG 13 17 27.6 -17 03 44   17.6       ~ 3 0
158 LEDA 83925 GiG 13 17 32.00 -15 52 51.0   19.0       ~ 6 0
159 LEDA 83926 G 13 17 34.2 -16 10 57   18.7       ~ 6 0
160 6dFGS gJ131736.4-163225 GiG 13 17 36.3829220736 -16 32 25.404749160   15.4       ~ 17 0
161 LEDA 83928 GiG 13 17 39.0 -16 45 58   19.4       ~ 3 0
162 [FS90] NGC 5044 155 GiG 13 17 40.90 -15 44 35.0   17.4       ~ 4 0
163 [CB2005] B4 G 13 17 42.0 -16 10 05           ~ 2 0
164 [FS90] NGC 5044 156 GiG 13 17 47 -15 43.7   18.3       ~ 4 0
165 2MFGC 10625 GiG 13 18 09.024 -16 58 15.65   16.9       ~ 12 0
166 MCG-02-34-019 EmG 13 18 26.854 -15 45 59.91   15.18   14.09   ~ 22 0
167 [FS90] NGC 5044 162 GiG 13 18 28 -16 16.7   16.9       ~ 2 0
168 IC 4221 Sy1 13 18 30.3595530480 -14 36 32.170225356   13.93   12.94   ~ 62 0
169 MCG-03-34-045 EmG 13 18 41.257 -19 04 47.70   14.56   13.64   ~ 18 0
170 LEDA 46402 AG? 13 18 56.50 -17 38 06.0           ~ 13 0
171 MCG-03-34-047 GiG 13 18 59.0737282320 -18 35 16.549494684   14.00   12.57   ~ 31 0
172 MCG-02-34-024 GiG 13 19 17.5199879736 -15 09 25.303909968   14   13.50   ~ 24 0
173 NGC 5073 Sy2 13 19 20.6629199856 -14 50 40.937423928   13.46   12.19   ~ 102 0
174 2MASX J13192221-1509232 G 13 19 22.218 -15 09 23.30   16.14   15.10   ~ 4 0
175 LEDA 46494 AG? 13 19 54.83 -17 18 55.8   15.46   14.80   ~ 17 0
176 HIPASS J1320-14 AG? 13 20 12.9340 -14 27 42.146           ~ 9 1
177 MCG-02-34-033 GiP 13 20 16.9839232800 -14 48 45.351366048   15   14.13   ~ 23 0
178 MCG-03-34-051 AG? 13 20 18.552 -16 32 15.53   15   13.67   ~ 20 0
179 [FS90] NGC 5044 97 GiG ~ ~   19.0       ~ 2 0
180 NAME Local Group GrG ~ ~           ~ 9325 0

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