1999AJ....118..625D

Query : 1999AJ....118..625D

1999AJ....118..625D - Astron. J., 118, 625-632 (1999/August-0)

On the different radio source populations in the Butcher-Oemler clusters Abell 2125 and 2645.

DWARAKANATH K.S. and OWEN F.N.

Abstract (from CDS):

The Abell clusters 2125 and 2645 have different radio source populations, despite being very similar in richness (Abell class 4) and redshift (∼0.25). The number density of radio sources in Abell 2125 is almost an order of magnitude more than that in Abell 2645, based on observations to the same optical and radio luminosities of the two clusters. About 30% of the radio sources in Abell 2125 shows signs of star formation, with the largest concentration of them in the southwest clump 2 Mpc from the cluster center. There is a bimodal distribution of Abell 2125 members in radio luminosity, with the majority below a spectral luminosity at 20 cm of 1023 W.Hz–1. This entire low-luminosity class of galaxies is absent in Abell 2645. Based on earlier observations, the blue galaxy fractions in Abell 2125 and Abell 2645 are known to be 0.19 and 0.03, respectively. Most of the blue galaxies responsible for the Butcher-Oemler effect in Abell 2125 were not detected in radio to a 20 cm luminosity limit of 1.4x1022 W.Hz–1. The current supernova rate in these blue galaxies is unlikely to be more than a few times the current Galactic supernova rate. The different dynamical states of the two clusters might be responsible for the differences in the radio source populations observed in these two clusters, as well as the Butcher-Oemler effect.

Abstract Copyright: ∼

Journal keyword(s): galaxies: clusters: individual (Abell 2125, Abell 2645) - Galaxies: Starburst - Radio Continuum

VizieR on-line data: <Available at CDS (J/AJ/118/625): table2.dat table3.dat>

Nomenclature: Table 2: [DO99] ACO 2125 NN (Nos 1-54). Table 3: [DO99] ACO 2645 NN (Nos 1-36).

Simbad objects: 96

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Number of rows : 96
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 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
2 ZwCl 0024+1652 ClG 00 26 35.6 +17 09 32     18.35     ~ 648 1
3 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
4 M 82 AGN 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 6156 6
5 [DO99] ACO 2125 1 GiC 15 39 08.68 +66 08 54.2           ~ 3 0
6 [DO99] ACO 2125 2 GiC 15 39 33.20 +66 07 44.1           ~ 3 0
7 [DO99] ACO 2125 3 GiC 15 39 46.17 +66 06 25.7           ~ 2 0
8 [DO99] ACO 2125 5 GiC 15 39 59.39 +66 16 07.9           ~ 3 0
9 [DO99] ACO 2125 4 GiC 15 39 59.40 +66 11 27.2           ~ 3 0
10 NVSS J153959+660550 rG 15 40 00.01 +66 05 51.5           ~ 5 1
11 [DO99] ACO 2125 7 GiC 15 40 05.42 +66 10 13.3           ~ 4 0
12 [DO99] ACO 2125 8 GiC 15 40 08.67 +66 15 36.4           ~ 2 0
13 2MASX J15400902+6612167 GiC 15 40 09.0362086056 +66 12 17.042663376           ~ 4 0
14 [DO99] ACO 2125 10 GiC 15 40 12.09 +66 12 10.6           ~ 3 0
15 [DO99] ACO 2125 11 GiC 15 40 15.88 +66 11 10.8           ~ 3 0
16 [DO99] ACO 2125 12 GiC 15 40 25.94 +66 30 30.3           ~ 2 0
17 [DO99] ACO 2125 13 GiC 15 40 30.10 +66 12 14.6           ~ 3 0
18 [DO99] ACO 2125 14 GiC 15 40 30.36 +66 13 04.1           ~ 3 0
19 [DO99] ACO 2125 15 GiC 15 40 30.82 +66 12 27.1           ~ 2 0
20 [DO99] ACO 2125 16 GiC 15 40 33.63 +66 08 01.7           ~ 3 0
21 [DO99] ACO 2125 17 GiC 15 40 39.86 +66 13 10.0           ~ 3 0
22 2MASX J15404066+6626538 GiC 15 40 40.7899517376 +66 26 54.058188552           ~ 5 0
23 [DO99] ACO 2125 19 GiC 15 40 42.50 +66 08 54.5           ~ 3 0
24 [DO99] ACO 2125 20 GiC 15 40 43.19 +66 10 21.1           ~ 2 0
25 [MOH2004] J154049.2+661840 G 15 40 49.2 +66 18 40           ~ 4 0
26 BOW ACO 2125 CC017 GiC 15 40 50.90 +66 16 31.4           ~ 3 0
27 [DO99] ACO 2125 23 GiC 15 40 51.86 +66 06 31.1           ~ 3 0
28 [DO99] ACO 2125 24 GiC 15 40 53.71 +66 05 26.5           ~ 2 0
29 [DO99] ACO 2125 25 GiC 15 40 54.54 +66 11 28.2           ~ 2 0
30 [DO99] ACO 2125 26 GiC 15 40 54.7 +66 17 16           ~ 4 0
31 [DO99] ACO 2125 27 GiC 15 40 56.90 +66 26 46.5           ~ 2 0
32 [DO99] ACO 2125 28 GiC 15 41 00.71 +66 13 53.2           ~ 3 0
33 2MASX J15410194+6616265 GiC 15 41 01.9233554688 +66 16 26.618521584       17.19   ~ 6 0
34 BOW ACO 2125 CC044 GiC 15 41 05.16 +66 12 34.4           ~ 3 0
35 [DO99] ACO 2125 31 GiC 15 41 07.32 +66 21 23.8           ~ 2 0
36 BOW ACO 2125 CC033 rG 15 41 09.74 +66 15 45.0           ~ 23 0
37 BOW ACO 2125 CC101 GiC 15 41 10.88 +66 13 13.2           ~ 3 0
38 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 124 1
39 2MASX J15411437+6615567 rG 15 41 14.4078965040 +66 15 56.144614572           ~ 8 0
40 2MASX J15411461+6621397 GiC 15 41 14.5931667600 +66 21 40.089474396           ~ 3 0
41 [DO99] ACO 2125 36 rG 15 41 14.89 +66 16 04.3           ~ 7 0
42 [DO99] ACO 2125 37 rG 15 41 15.24 +66 15 57.5           ~ 7 0
43 [DO99] ACO 2125 38 GiC 15 41 28.02 +66 13 26.7           ~ 3 0
44 [DO99] ACO 2125 39 GiC 15 41 33.88 +66 22 55.9           ~ 2 0
45 2MASX J15413402+6631118 GiC 15 41 34.025 +66 31 11.85           ~ 4 0
46 [VBC2006] MMJ1541+6622 QSO 15 41 40.9885482408 +66 22 37.945536528           ~ 6 0
47 [RS2005] ACO 2125 595 GiC 15 41 43.30 +66 15 16.9           ~ 4 0
48 [DO99] ACO 2125 43 GiC 15 41 48.84 +66 11 37.6           ~ 3 0
49 [DO99] ACO 2125 44 GiC 15 42 02.87 +66 15 53.8           ~ 3 0
50 [DO99] ACO 2125 45 GiC 15 42 03.85 +66 26 32.3           ~ 3 0
51 [DO99] ACO 2125 46 GiC 15 42 14.54 +66 30 03.4           ~ 3 0
52 [DO99] ACO 2125 47 GiC 15 42 24.27 +66 19 59.4           ~ 3 0
53 [DO99] ACO 2125 48 GiC 15 42 24.76 +66 29 03.7           ~ 2 0
54 [DO99] ACO 2125 49 GiC 15 42 25.16 +66 09 17.7           ~ 2 0
55 [DO99] ACO 2125 50 GiC 15 42 41.04 +66 24 37.5           ~ 3 0
56 [DO99] ACO 2125 51 GiC 15 42 41.33 +66 24 34.6           ~ 3 0
57 [DO99] ACO 2125 52 GiC 15 43 01.14 +66 15 17.8           ~ 2 0
58 [DO99] ACO 2125 53 GiC 15 43 07.81 +66 13 43.9           ~ 3 0
59 [DO99] ACO 2125 54 GiC 15 43 44.96 +66 30 01.2           ~ 2 0
60 LEDA 994444 Sy2 23 40 27.8128833384 -09 09 46.425263256   16.69   15.55   ~ 7 0
61 [DO99] ACO 2645 2 GiC 23 40 39.56 -08 51 37.1           ~ 2 0
62 [DO99] ACO 2645 3 GiC 23 40 43.1600 -08 53 56.795           ~ 4 0
63 [DO99] ACO 2645 4 GiC 23 40 45.4810 -09 01 55.164           ~ 3 0
64 [DO99] ACO 2645 5 GiC 23 40 49.35 -08 57 03.7           ~ 2 0
65 [DO99] ACO 2645 7 GiC 23 40 52.22 -08 58 30.1           ~ 2 0
66 [VV2006] J234053.0-090315 QSO 23 40 53.0507965056 -09 03 15.058349964   19.86 19.52     ~ 22 0
67 [DO99] ACO 2645 8 GiC 23 40 57.04 -09 01 53.7           ~ 2 0
68 [DO99] ACO 2645 9 GiC 23 41 07.73 -08 55 45.8           ~ 2 0
69 [DO99] ACO 2645 10 GiC 23 41 10.1731727376 -08 57 12.165123204           ~ 4 0
70 NVSS J234111-084447 rG 23 41 11.4214479816 -08 44 48.140240208           ~ 6 1
71 [DO99] ACO 2645 11 GiC 23 41 11.54 -09 00 04.0           ~ 2 0
72 [DO99] ACO 2645 13 GiC 23 41 11.5466971248 -09 02 02.446635300           ~ 4 0
73 [DO99] ACO 2645 14 GiC 23 41 13.04 -09 02 12.4           ~ 2 0
74 [DO99] ACO 2645 15 GiC 23 41 13.99 -09 07 47.8           ~ 2 0
75 [DO99] ACO 2645 16 BiC 23 41 15.2615323320 -09 05 17.180927412           ~ 7 0
76 [DO99] ACO 2645 17 GiC 23 41 16.20 -08 55 09.6           ~ 2 0
77 ACO 2645 ClG 23 41 17.0 -09 01 11           ~ 98 0
78 [DO99] ACO 2645 18 GiC 23 41 17.11 -09 02 17.0           ~ 2 0
79 [DO99] ACO 2645 19 GiC 23 41 20.76 -08 55 42.1           ~ 2 0
80 [DO99] ACO 2645 20 GiC 23 41 21.97 -09 02 13.5           ~ 2 0
81 [DO99] ACO 2645 21 GiC 23 41 26.010 -09 04 49.80           ~ 3 0
82 [DO99] ACO 2645 22 GiC 23 41 37.29 -08 51 54.2           ~ 2 0
83 [DO99] ACO 2645 23 GiC 23 41 37.54 -09 11 00.0           ~ 2 0
84 [DO99] ACO 2645 24 GiC 23 41 37.86 -09 03 11.7           ~ 2 0
85 2MASX J23413944-0902117 GiC 23 41 39.4441453128 -09 02 11.839405776           ~ 2 0
86 [DO99] ACO 2645 26 GiC 23 41 39.66 -08 48 36.0           ~ 2 0
87 LEDA 1000052 GiC 23 41 40.7 -08 43 14           ~ 5 0
88 2MASX J23414228-0914327 GiC 23 41 42.3035011584 -09 14 32.639103060           ~ 4 0
89 [DO99] ACO 2645 29 GiC 23 41 44.1 -09 08 00           ~ 2 0
90 NVSS J234157-085516 rG 23 41 57.9763019472 -08 55 16.858110612           ~ 6 0
91 [DO99] ACO 2645 31 GiC 23 41 59.74 -09 02 05.8           ~ 2 0
92 2MASX J23415976-0903486 GiC 23 41 59.7424275600 -09 03 48.906573444           ~ 3 0
93 [DO99] ACO 2645 33 GiC 23 42 00.31 -09 03 00.4           ~ 2 0
94 [DO99] ACO 2645 34 GiC 23 42 03.04 -09 04 25.5           ~ 2 0
95 NVSS J234203-085129 rG 23 42 03.3203 -08 51 28.512           ~ 4 0
96 [DO99] ACO 2645 36 GiC 23 42 04.98 -08 58 31.5           ~ 1 0

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