2001MNRAS.326.1547T

Query : 2001MNRAS.326.1547T

2001MNRAS.326.1547T - Mon. Not. R. Astron. Soc., 326, 1547-1562 (2001/October-1)

The colour-magnitude relation for galaxies in the Coma cluster.

TERLEVICH A.I., CALDWELL N. and BOWER R.G.

Abstract (from CDS):

We present a new photometric catalogue of the Coma galaxy cluster in the Johnson U and V bands. We cover an area of 3360arcmin2 of sky, to a depth of V=20mag in a 13-arcsec diameter aperture, and produce magnitudes for ∼1400 extended objects in metric apertures from 8.8- to 26-arcsec diameters. The mean internal rms scatter in the photometry is 0.014mag in V, and 0.026mag in U, for V13< 17mag.

We place new limits on the levels of scatter in the colour-magnitude relation (CMR) in the Coma cluster, and investigate how the slope and scatter of the CMR depend on galaxy morphology, luminosity and position within the cluster. As expected, the lowest levels of scatter are found in the elliptical galaxies, while the late-type galaxies have the highest numbers of galaxies bluewards of the CMR. We investigate whether the slope of the CMR is an artefact of colour gradients within galaxies, and show that it persists when the colours are measured within a diameter that scales with galaxy size. Looking at the environmental dependence of the CMR, we find a trend of systematically bluer galaxy colours with increasing projected radius from the centre of the cluster. Surprisingly, this is accompanied by a decreased scatter of the CMR. We investigate whether this gradient could be caused by dust in the cluster potential, however the reddening required would produce too large a scatter in the colours of the central galaxies. The gradient appears to be better reproduced by a gradient in the mean galactic ages with projected radius.


Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): catalogues - galaxies: clusters: individual: Coma - galaxies: fundamental parameters

Nomenclature: Catalogue: [TCB2001] FF-NNN N=1441.

Simbad objects: 62

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Number of rows : 62
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 NAME Hubble Deep Field reg 12 36 49.5 +62 12 58           ~ 1967 1
2 2MASX J12571778+2748388 EmG 12 57 17.8127988168 +27 48 39.313837872   15 15.63 15.61   ~ 43 0
3 2MASX J12572351+2745588 GiC 12 57 23.4686817552 +27 45 58.626253332   16 15.13 14.93   ~ 24 0
4 NGC 4839 BiC 12 57 24.3563164776 +27 29 52.203087132 13.56 13.02 12.06     ~ 482 3
5 LEDA 126874 GiC 12 57 26.12279 +27 39 33.8252     17.01 16.95   ~ 15 0
6 2MASX J12573641+2804368 GiC 12 57 36.4422463488 +28 04 37.278479424   16 15.66 15.56   ~ 22 0
7 2MASX J12574670+2808264 GiC 12 57 46.7047022328 +28 08 26.747855484   16 15.85 15.70   ~ 27 0
8 2MASX J12575059+2752454 GiG 12 57 50.6358338592 +27 52 46.172236800   15.3 15.13 14.88   ~ 38 0
9 MCG+05-31-036 AGN 12 57 54.3651088944 +27 29 26.392988076   16.38 15.12 14.65   ~ 55 1
10 A2 236 GiC 12 57 56.22936 +27 34 52.8320   16.90 15.81 15.69   ~ 38 0
11 LEDA 83707 GiC 12 57 56.79626 +27 59 30.3056   16 16.55 16.70   ~ 33 0
12 MCG+05-31-035 EmG 12 57 57.748 +28 03 41.50   16 17.10 17.09   ~ 83 0
13 MCG+05-31-037 LIN 12 58 01.5650845536 +27 29 22.847682660   14.5 14.65 14.47   ~ 55 0
14 2MASX J12581682+2743467 GiC 12 58 16.8233672328 +27 43 46.903260036 17.46   16.44     ~ 13 0
15 LEDA 1819621 GiC 12 58 18.21265 +27 50 54.5715 17.77   16.76 16.87   ~ 24 0
16 TT 33 AGN 12 58 18.6318954144 +27 18 38.983019940   16.95 15.94 15.69   ~ 83 0
17 NGC 4851 GiG 12 58 21.7112672880 +28 08 55.482369216 15.87 15.2 14.49     ~ 56 0
18 NGC 4851N GiG 12 58 22.1618225520 +28 09 07.650507456 16.24 15.2 15.28 15.02   ~ 40 0
19 LEDA 1827127 EmG 12 58 25.5275211384 +28 07 44.085207936 16.77   15.94 15.87   ~ 28 0
20 LEDA 44461 SyG 12 58 28.40768 +27 33 33.7284   16 15.70 15.56   ~ 46 0
21 LEDA 4349278 GiC 12 58 31.663 +27 23 42.08   18.77 17.22 17.11   ~ 16 0
22 2MASX J12583314+2721517 GiC 12 58 33.1369880712 +27 21 51.737031936   15       ~ 33 1
23 NGC 4853 rG 12 58 35.1979266912 +27 35 46.930900632 13.96 14.68 13.00 13.24   ~ 156 1
24 IC 3943 LIN 12 58 36.3535295664 +28 06 49.471215084 15.63 15.6 14.13     ~ 60 0
25 IC 3946 AG? 12 58 48.7288667760 +27 48 37.586925792 15.33 15.3 13.85 13.821 13.094 ~ 77 0
26 2MASX J12585341+2807339 GiC 12 58 53.4454842792 +28 07 33.862368612 16.77 15 15.34     ~ 37 0
27 LEDA 126813 GiC 12 58 53.790 +27 23 19.13     17.65 17.51   ~ 9 0
28 LEDA 126807 GiC 12 59 00.400 +27 38 38.34 18.89 19.11 18.38 18.34 18.00 ~ 11 0
29 Z 160-214 AGN 12 59 01.8109774776 +28 13 31.188539316 15.48 15.3 14.01     ~ 63 0
30 NGC 4858 EmG 12 59 02.0718950520 +28 06 56.228264028 15.33 15.5 15.08 15.16   ~ 126 0
31 Z 160-73 EmG 12 59 05.2918849008 +27 38 40.186270032 14.90 15.1 14.54     ~ 129 0
32 IC 3955 GiC 12 59 06.0295581048 +27 59 48.152325300 15.78 15.591 14.31 14.011 13.323 ~ 98 0
33 LEDA 126798 GiC 12 59 14.984 +28 15 03.66 17.42 17.60 16.12 16.01   ~ 27 0
34 LEDA 126795 GiC 12 59 18.54581 +27 35 36.9732 17.79 17.93 17.04 16.95   ~ 25 0
35 NGC 4856 GiG 12 59 21.2433153888 -15 02 31.292291292   11   10.72   ~ 85 0
36 NGC 4871 LIN 12 59 29.9631023208 +27 57 23.169658968 15.59 15.1 14.07 13.801 13.113 ~ 121 0
37 IC 3973 AG? 12 59 30.8230953864 +27 53 03.142254372 15.50 15.2 14.03 13.802 13.114 ~ 112 0
38 NGC 4874 LIN 12 59 35.7093764280 +27 57 33.293892204 13.01 13.7 12.71 12.27 11.386 ~ 814 3
39 LEDA 44636 G 12 59 38.3213456016 +27 59 13.953200280 17.19 17.13 15.89 15.59 15.002 ~ 66 0
40 LEDA 44643 EmG 12 59 39.8152735224 +27 34 35.193798804   16.53 15.56 15.42   ~ 55 0
41 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
42 LEDA 126782 GiC 12 59 46.279 +27 44 46.50 18.39 18.16 16.81 16.82 16.95 ~ 25 0
43 2MASX J12595617+2744473 LSB 12 59 56.1192738432 +27 44 46.724602092 17.15 17.331 16.15 15.87 16.04 ~ 37 0
44 2MASX J12595670+2755483 GiC 12 59 56.6529405408 +27 55 48.133297416 16.72 16.765 15.32 14.88 14.592 ~ 71 0
45 LEDA 126767 LSB 13 00 08.05642 +27 46 23.9143 17.45 17.675 16.57 16.45 16.398 ~ 36 0
46 NGC 4889 EmG 13 00 08.097 +27 58 37.29 12.93 13.0 11.30 11.652 10.906 ~ 742 1
47 LEDA 44723 G 13 00 12.8704082496 +28 04 31.779305976 16.53 16.272 15.17 14.742 14.122 ~ 81 0
48 LEDA 93586 AG? 13 00 18.7771580832 +27 56 13.466814396 16.99 17.014 15.44 15.13 14.962 ~ 59 0
49 Z 160-86 EmG 13 00 33.732 +27 38 15.64   15.4 14.54 14.23   ~ 117 0
50 IC 4040 EmG 13 00 37.9703238053 +28 03 26.882897167 15.13 15.1 15.04 14.74 13.981 ~ 175 2
51 IC 4042 AGN 13 00 42.7595583480 +27 58 16.579136856 15.44 15.272 14.01 13.713 13.025 ~ 105 0
52 NGC 4907 LIN 13 00 48.8047215840 +28 09 30.079901916 15.27 14.6 13.81     ~ 95 0
53 NGC 4911 LIN 13 00 56.0616749160 +27 47 27.152821212 14.58 13.7 13.33 12.601 12.068 ~ 218 1
54 Z 160-261 EmG 13 00 59.2582319952 +27 53 59.450406900 15.99 15.6 14.61     ~ 65 0
55 LEDA 126742 EmG 13 01 19.3212718248 +27 51 37.756941984     16.66 16.38   ~ 26 0
56 NGC 4921 Sy2 13 01 26.1222244152 +27 53 09.629006748   13.7       ~ 225 0
57 2MASX J13012713+2759566 GiC 13 01 27.1496982624 +27 59 57.116288112   16       ~ 39 0
58 NGC 4923 EmG 13 01 31.7992415376 +27 50 51.100173564   14.7       ~ 114 0
59 2MASX J13014420+2812517 GiC 13 01 44.1740267520 +28 12 51.745218120     16.20 15.90   ~ 23 0
60 Z 160-101 LIN 13 01 47.0185231920 +28 05 41.988686424   15.2       ~ 65 0
61 Z 160-100 LIN 13 01 50.2187654184 +27 53 36.859795296   15.5       ~ 71 0
62 ACO 2390 ClG 21 53 37.4 +17 41 46           ~ 732 2

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