2010A&A...511A..12E

Query : 2010A&A...511A..12E

2010A&A...511A..12E - Astronomy and Astrophysics, volume 511A12-12 (2010/2-2)

Revisiting the low-luminosity galaxy population of the NGC 5846 group with SDSS.

EIGENTHALER P. and ZEILINGER W.W.

Abstract (from CDS):

Low-luminosity galaxies are known to outnumber the bright galaxy population in poor groups and clusters of galaxies. Yet, the investigation of low-luminosity galaxy populations outside the Local Group remains rare and the dependence on different group environments is still poorly understood. Previous investigations have uncovered the photometric scaling relations of early-type dwarfs and a strong dependence of morphology with environment. The present study aims to analyse the photometric and spectroscopic properties of the low-luminosity galaxy population in the nearby, well-evolved and early-type dominated NGC 5846 group of galaxies. It is the third most massive aggregate of early-type galaxies after the Virgo and Fornax clusters in the local universe. Photometric scaling relations and the distribution of morphological types as well as the characteristics of emission-line galaxies are investigated. Spectroscopically selected low-luminosity group members from the Sloan Digital Sky Survey with cz<3000km/s within a radius of 2°=0.91Mpc around NGC 5846 are analysed. Surface brightness profiles of early-type galaxies are fit by a Sersic model ∝r1/n. Star formation rates, oxygen abundances, and emission characteristics are determined for emission-line galaxies. Seven new group members showing no entry in previous catalogues are identified in the outer (>1.33°) parts of the system. Several photometric scaling relations for dEs as well as the morphology-density relation for dwarf galaxies are reproduced. The correlation between host and satellite morphologies in poor groups of galaxies is also confirmed. Nucleated dwarfs are found to be located in the vicinity to the brightest ellipticals in the group. Only two faint galaxies exhibit fine structure. Emission-line dwarfs show no interaction-induced activity.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual: NGC 5846 group - galaxies: dwarf - galaxies: photometry - methods: data analysis

VizieR on-line data: <Available at CDS (J/A+A/511/A12): table1.dat>

Nomenclature: Table 1: [EZ2010] N5846 NN (Nos 01-56).

Simbad objects: 82

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Number of rows : 82
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 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2236 2
2 NGC 1400 EmG 03 39 30.851 -18 41 17.25 12.48 12.01 10.96 10.45   ~ 309 1
3 M 96 GiP 10 46 45.744 +11 49 11.78 10.42 10.15 9.25 8.99   ~ 862 1
4 NGC 4274 LIN 12 19 50.5930710456 +29 36 53.238538764 11.78 11.34 10.41     ~ 263 1
5 Z 20-39 GiG 14 58 48.7186892424 +02 01 24.710276208   14.9   13.02   ~ 32 0
6 NGC 5806 Sy2 15 00 00.4088018736 +01 53 28.779594792   12.40 11.70 10.94 11.6 ~ 305 1
7 Z 20-42 GiG 15 00 16.5832431024 +02 18 02.598103260   15.4   14.05   ~ 23 0
8 [MTT2005] N5846-046 GiG 15 00 26.9 +01 28 31       12.98   ~ 4 0
9 NGC 5811 GiP 15 00 27.407 +01 37 24.19   14.8   21.75   ~ 36 0
10 LEDA 3350778 AG? 15 00 33.024 +02 13 49.18       16.22   ~ 18 0
11 LEDA 1193898 GiG 15 00 52.5863969280 +01 24 17.854436808       15.27   ~ 11 0
12 LEDA 4018458 GiG 15 00 59.357 +01 52 36.17       18.54   ~ 8 0
13 LEDA 3350761 GiG 15 00 59.362 +01 38 57.14       17.17   ~ 9 0
14 LEDA 4016257 GiG 15 01 00.851 +01 00 49.87       16.98   ~ 11 0
15 Z 20-44 H2G 15 01 03.124 +00 42 26.97   15.6   14.57   ~ 29 0
16 LEDA 3350784 GiG 15 01 06.966 +02 05 25.24       17.22   ~ 8 0
17 NGC 5813 LIN 15 01 11.2302420864 +01 42 07.141569696 12.00 11.45 10.46 10.06   ~ 673 2
18 LEDA 1196740 GiG 15 01 15.337 +01 29 53.52       16.42   ~ 9 0
19 LEDA 1205406 GiG 15 01 15.894 +01 46 24.61       17.30   ~ 11 0
20 LEDA 3350757 GiG 15 01 38.390 +01 43 19.84       16.19   ~ 9 0
21 LEDA 1208589 GiG 15 01 38.612 +01 52 12.66       16.68   ~ 9 0
22 Z 20-48 GiG 15 02 03.534 +01 50 28.01   14.61   12.93   ~ 65 1
23 LEDA 1192611 GiG 15 02 28.132 +01 21 51.14       17.18   ~ 13 0
24 LEDA 4018466 GiG 15 02 33.029 +01 56 08.26       17.38   ~ 11 0
25 [MTT2005] N5846-091 GiG 15 02 36.038 +02 01 39.59       16.87   ~ 6 0
26 LEDA 1230503 GiG 15 03 44.281 +02 33 08.15       16.07   ~ 14 0
27 LEDA 1180802 GiG 15 03 49.932 +00 58 31.79       15.02   ~ 17 0
28 LEDA 1185375 AG? 15 03 50.3150870208 +01 07 36.529883580       14.67   ~ 18 0
29 SHOC 496a HII 15 03 55.6509734568 +00 25 55.592513364           ~ 3 0
30 LEDA 87108 G 15 03 56.1 +00 25 45           ~ 15 0
31 SHOC 496b HII 15 03 56.22 +00 25 46.5           ~ 2 0
32 NGC 5831 GiG 15 04 07.0002600408 +01 13 11.705607012   13.1   11.19   ~ 304 0
33 LEDA 1197513 GiG 15 04 08.458 +01 31 28.15       14.94   ~ 17 0
34 LEDA 1230189 GiG 15 04 13.07819 +02 32 34.7521       14.98   ~ 10 0
35 LEDA 1216386 GiG 15 04 24.693 +02 06 52.53       15.92   ~ 14 0
36 LEDA 1190315 GiG 15 04 42.900 +01 17 27.23       15.41   ~ 14 0
37 LEDA 4009173 GiG 15 04 48.505 +01 58 50.70       17.09   ~ 9 0
38 LEDA 1211621 GiG 15 05 04.403 +01 57 51.52       16.30   ~ 16 0
39 NGC 5838 GiG 15 05 26.2447857696 +02 05 57.349108392   12.1   10.26   ~ 252 0
40 NGC 5839 GiG 15 05 27.4892848248 +01 38 05.284771152   13.9 12.19 11.67 10.72 ~ 113 0
41 LEDA 1190358 GiG 15 05 28.630 +01 17 28.52       16.02   ~ 21 0
42 LEDA 1199471 AG? 15 05 31.838 +01 35 15.51     17.09 16.66 16.05 ~ 11 0
43 LEDA 1190714 GiG 15 05 37.740 +01 18 11.28       15.95   ~ 13 0
44 NAME NGC 5846 Group GrG 15 05 47.0 +01 34 25           ~ 165 0
45 LEDA 1209872 GiG 15 05 50.578 +01 54 29.80       15.33   ~ 14 0
46 LEDA 1213020 GiG 15 05 53.258 +02 00 27.06       17.11   ~ 13 0
47 NGC 5845 GiG 15 06 00.7823239488 +01 38 01.704838596   13.8 11.20 12.06 9.94 ~ 403 0
48 LEDA 1218738 GiG 15 06 03.322 +02 11 05.58       14.79   ~ 13 0
49 LEDA 1191322 GiG 15 06 06.736 +01 19 20.91       16.47   ~ 12 0
50 LEDA 1215798 GiG 15 06 11.33 +02 05 46.5       15.54   ~ 18 0
51 NGC 5846A GiP 15 06 29.2023813744 +01 35 41.627266512   14.1 13.37 13.07 12.1 ~ 125 0
52 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
53 SDSS J150634.25+001255.7 AG? 15 06 34.2522092232 +00 12 55.716695892           ~ 5 0
54 2MASS J15063426+0133317 GiG 15 06 34.2746979792 +01 33 31.731496740     15.27 14.76 13.96 ~ 22 0
55 NGC 5848 GiP 15 06 35.0399158656 +02 00 17.384867892   14.8   12.70   ~ 40 0
56 LEDA 1156476 AG? 15 06 40.971 +00 04 36.31           ~ 9 0
57 LEDA 1171244 AG? 15 06 42.04 +00 38 03.8       16.84   ~ 8 0
58 NGC 5850 LIN 15 07 07.6828131840 +01 32 39.513281352   11.5   10.79 11.1 ~ 330 1
59 LEDA 1185172 GiG 15 07 34.185 +01 07 13.17       16.23   ~ 8 0
60 Z 21-9 AG? 15 07 37.189 +02 01 09.80   15.7   14.25   ~ 14 0
61 NGC 5854 GiG 15 07 47.6993537544 +02 34 07.059522288   13.1   11.23   ~ 155 0
62 Z 21-11 GiG 15 07 47.8251198528 +01 17 31.433455500   15.6   14.10   ~ 16 0
63 LEDA 1217593 GiG 15 08 01.375 +02 09 03.86       16.99   ~ 12 0
64 Z 21-13 GiG 15 08 05.654 +01 39 05.91   15.6   14.22   ~ 20 0
65 Z 21-15 AG? 15 08 09.249 +01 36 29.76   15.7   14.67   ~ 13 0
66 LEDA 4012733 GiG 15 08 12.3881750808 +01 29 58.742687976       16.61   ~ 10 0
67 LEDA 1206166 Sy2 15 08 22.691 +01 47 55.00   20.51 20.01 17.13   ~ 18 0
68 LEDA 1209573 GiG 15 08 47.188 +01 53 59.90       15.77   ~ 9 0
69 2MASX J15090433+0049185 GiG 15 09 04.292 +00 49 19.17       16.08   ~ 11 0
70 LEDA 4005496 AG? 15 09 07.86 +00 43 29.6       17.79   ~ 13 0
71 LEDA 1210284 GiG 15 09 14.973 +01 55 17.18       15.52   ~ 13 0
72 NGC 5864 GiG 15 09 33.5680310184 +03 03 09.980709588   12.9   11.18   ~ 107 0
73 NGC 5865 GiP 15 09 49.4195561280 +00 28 12.385857792   13.5       ~ 99 0
74 Z 21-28 GiG 15 10 16.882 +01 55 59.88   15.0   13.55   ~ 62 0
75 Z 21-32 AG? 15 10 58.441 +01 26 15.99   15.6   15.22   ~ 32 0
76 LEDA 1202458 GiG 15 11 01.334 +01 40 50.14       16.13   ~ 12 0
77 [MTT2005] N5846-317 GiG 15 11 21.638 +01 36 37.70       16.87   ~ 6 0
78 Z 21-41 GiP 15 12 02.18989 +01 41 51.3104   14.6   15.62 14.1 ~ 73 0
79 LEDA 1199418 GiP 15 12 08.2234855488 +01 35 09.301854192       16.75   ~ 11 0
80 LEDA 1215336 AG? 15 12 24.0474460704 +02 04 48.207469440           ~ 11 0
81 LEDA 1176138 AG? 15 12 31.735 +00 48 45.50           ~ 12 0
82 LEDA 1200646 AG? 15 12 41.388 +01 37 23.78           ~ 10 0

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