1998AJ....115.1388C

Query : 1998AJ....115.1388C

1998AJ....115.1388C - Astron. J., 115, 1388-1399 (1998/April-0)

Radio sources in galaxy clusters at 28.5 GHz.

COORAY A.R., GREGO L., HOLZAPFEL W.L., JOY M. and CARLSTROM J.E.

Abstract (from CDS):

We present serendipitous detections of radio sources at 28.5 GHz (1 cm), which resulted from our program to image the thermal Sunyaev-Zeldovich (SZ) effect in 56 galaxy clusters. In a total area of ∼0.8 deg2, we find 64 radio sources with fluxes down to ∼0.4 mJy (greater than 4 σ) and within 250" from the pointing centers. The spectral indices (S ∝ ν–α) of 54 sources with published low-frequency flux densities lie in the range -0.6 ≲ α ≲ 2, with a mean of 0.77±0.06 and a median of 0.84. Extending low-frequency surveys of radio sources toward the galaxy clusters Cl 0016+16, Abell 665, and Abell 2218 to 28.5 GHz and selecting sources with S_1.4 GHz_ ≥ 7 mJy to form an unbiased sample, we find a mean spectral index of 0.71±0.08 and a median of 0.71. We find 4 to 7 times more sources than predicted from a low-frequency survey in areas without galaxy clusters. This excess cannot be accounted for by gravitational lensing of a background radio population by cluster potentials, indicating that most of the detected sources are associated with galaxy clusters. The differential source count slope, γ ∼ 1.96 (dN/dS ∝ S–γ), is flatter than what is expected for a nonevolving Euclidean population (γ = 2.5). For the cluster Abell 2218, the presence of unsubtracted radio sources with S_28.5 GHz_ ≤ 0.5 mJy (∼5 σ) can reduce the observed SZ temperature decrement by ΔT ∼ 10 to 25 µK. The corresponding overestimation of the Hubble constant derived through a combined analysis of 28.5 GHz SZ images and X-ray emission observations is less than 6%.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Clusters: General - Radio Continuum - Surveys - Techniques: Interferometric

Nomenclature: Table 3: [CGH98] JHHMM+DDMMA N=64.

Simbad objects: 132

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Number of rows : 132
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 [VV2006] J001831.2+162044 QSO 00 18 31.374 +16 20 42.00     17.68   21.84 ~ 16 3
2 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
3 ACO 68 ClG 00 37 06.2 +09 09 33           ~ 195 0
4 [CGH98] J0037+0907 Rad 00 37 06.3 +09 07 35           ~ 1 0
5 [CGH98] J0037+0908 Rad 00 37 07.1 +09 08 40           ~ 1 0
6 [CGH98] J0152+0059 Rad 01 52 29.8 +00 59 34           ~ 1 0
7 ACO 267 ClG 01 52 43.016 +00 59 58.90           ~ 241 0
8 SDSS J015254.72+010211.6 QSO 01 52 54.7319111640 +01 02 11.636907684           ~ 8 0
9 [CGH98] J0223-0834 Rad 02 23 58.9 -08 34 25           ~ 1 0
10 ACO 348 ClG 02 23 59.20 -08 35 43.4           ~ 34 0
11 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 825 0
12 [CGH98] J0237-0147 Rad 02 39 55.7 -01 34 31           ~ 1 0
13 ACO 383 ClG 02 48 03.3915 -03 31 45.228           ~ 389 0
14 [CGH98] J0248-0331 Rad 02 48 04.1 -03 31 20           ~ 1 0
15 [CGH98] J0305+1711 Rad 03 05 27.9 +17 11 31           ~ 1 0
16 ClG 0303+1658 ClG 03 05 31.6 +17 10 02     20.13     ~ 92 0
17 [CGH98] J0305+1710 Rad 03 05 31.6 +17 10 04           ~ 1 0
18 ACT-CL J0438.9+0716 ClG 04 39 00.7 +07 15 45           ~ 62 0
19 [CGH98] J0439+0715 Rad 04 39 01.4 +07 15 45           ~ 1 0
20 [CGH98] J0439+0714 Rad 04 39 12.2 +07 14 11           ~ 1 0
21 NVSS J045401+025745 rG 04 54 01.1800374096 +02 57 45.666962028           ~ 5 1
22 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
23 ClG 0451-03 ClG 04 54 10.9 -03 01 07     20.0     ~ 368 0
24 NVSS J045417+025533 Rad 04 54 17.0 +02 55 32           ~ 3 1
25 [CGH98] J0455+0255B Rad 04 54 21.1 +02 55 02           ~ 2 0
26 CNOC MS 0451 101051 EmG 04 54 24.207 -03 01 13.35           ~ 3 0
27 ACO 586 ClG 07 32 20.3 +31 37 58           ~ 196 0
28 [CGH98] J0732+3142 Rad 07 32 21.3 +31 42 12           ~ 1 0
29 ACO 611 ClG 08 00 58.7 +36 02 49           ~ 275 0
30 [CGH98] J0830+6550 Rad 08 30 26.4 +65 50 36           ~ 1 0
31 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
32 NVSS J083130+655236 rG 08 31 31.0 +65 52 36           ~ 3 0
33 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
34 [CGH98] J0850+3604 Rad 08 50 08.1 +36 04 22           ~ 1 0
35 ZwCl 0847+3617 ClG 08 50 12.0 +36 03 36           ~ 75 0
36 [CGH98] J0900+2053 Rad 09 00 36.5 +20 53 41           ~ 1 0
37 ZwCl 0857+2107 ClG 09 00 36.90 +20 53 40.3           ~ 103 0
38 FIRST J092023.3+302943 rG 09 20 23.20402 +30 29 43.0096       19.782   ~ 4 0
39 ACO 781 ClG 09 20 25.4 +30 30 07           ~ 167 0
40 SDSS J094257.44+465849.7 BiC 09 42 57.442 +46 58 49.76           ~ 19 0
41 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
42 [CGH98] J0952+5151 Rad 09 52 44.5 +51 51 18           ~ 1 0
43 ZwCl 0949+5207 ClG 09 52 49.1 +51 53 05           ~ 141 0
44 [CGH98] J1017+5934 Rad 10 17 34.2 +59 34 31           ~ 1 0
45 ACO 959 ClG 10 17 35.0 +59 33 28           ~ 76 0
46 ACO 992 ClG 10 22 32 +20 29.8           ~ 17 0
47 [CGH98] J1023+0409B Rad 10 23 37.2 +04 09 06           ~ 1 0
48 ZwCl 1021+0426 ClG 10 23 39.0 +04 11 14   15.6 17.95     ~ 297 0
49 ACO 990 ClG 10 23 39.46 +49 08 19.6           ~ 88 0
50 [CGH98] J1023+0409A Rad 10 23 45.1 +04 10 40           ~ 1 0
51 CXOMP J105648.9-033725 rG 10 56 48.8712858984 -03 37 25.905719136   18.678   18.539   ~ 10 0
52 [CGH98] J1056-0337A Rad 10 56 59.6 -03 37 30           ~ 1 0
53 ClG 1054-03 ClG 10 57 00.2 -03 37 27     22     ~ 458 0
54 ClG 1137+66 ClG 11 40 23.0 +66 08 16     21.0     ~ 141 0
55 [CGH98] J1142+5831 Rad 11 42 19.2 +58 31 03           ~ 1 0
56 ACO 1351 ClG 11 42 24.7795 +58 32 05.558           ~ 90 0
57 NVSS J114223+583202 rG 11 42 24.7922699832 +58 32 05.464651344   19.0       ~ 13 2
58 2MASX J11550897+2326227 rG 11 55 08.9748439464 +23 26 23.437261896           ~ 22 0
59 ACO 1413 ClG 11 55 12.87 +23 23 46.9           ~ 456 0
60 8C 1234+634 Rad 12 34 19.1 +63 28 28           ~ 1 0
61 FIRST J123657.4+631115 rG 12 36 57.4579873320 +63 11 15.598818060           ~ 3 0
62 ACO 1576 ClG 12 36 59.5 +63 11 18           ~ 116 0
63 NVSS J130645+463333 rG 13 06 45.7003308048 +46 33 30.736743120           ~ 18 1
64 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 149 1
65 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
66 [CGH98] J1311-0120 Rad 13 11 30.6 -01 20 27           ~ 1 0
67 [CGH98] J1311-0119 Rad 13 11 31.0 -01 19 35           ~ 1 0
68 ACO 1703 ClG 13 15 05.2 +51 49 02           ~ 157 0
69 [CGH98] J1315+5148 Rad 13 15 08.2 +51 48 43           ~ 1 0
70 [CGH98] J1318+7018 Rad 13 18 51.7 +70 18 45           ~ 1 0
71 ACO 1722 ClG 13 20 08.3 +70 04 33           ~ 63 0
72 SDSS J133520.09+410004.1 rG 13 35 20.0970341040 +41 00 04.196824164           ~ 17 0
73 ACO 1763 ClG 13 35 20.1 +41 00 04           ~ 335 0
74 [CGH98] J1358+0306 Rad 13 58 35.3 +03 06 10           ~ 1 0
75 SDSS J135950.56+623105.3 rG 13 59 50.571 +62 31 05.16   19.94 19.05 17.80 17.11 ~ 28 2
76 ZwCl 1358+6245 ClG 13 59 54.3 +62 30 36     18.5     ~ 370 0
77 ACO 1835 ClG 14 01 02.07 +02 52 43.2           ~ 727 1
78 NAME SMM J14010+0252 Sy1 14 01 02.0819944848 +02 52 42.426538140   19.3       ~ 47 2
79 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
80 [CGH98] J1452+5801 Rad 14 52 46.9 +58 01 48           ~ 1 0
81 ACO 1995 ClG 14 52 55.0 +58 02 59           ~ 140 0
82 [CGH98] J1453+5803 Rad 14 53 00.4 +58 03 11           ~ 2 0
83 NVSS J145715+222036 rG 14 57 15.0998550864 +22 20 34.320909444   18.5   16.82   ~ 25 1
84 ZwCl 1455+2232 ClG 14 57 15.2 +22 20 30     18.62 20.04   ~ 309 0
85 FIRST J153250.9+301946 Rad 15 32 50.917 +30 19 46.09           ~ 1 0
86 LEDA 1900245 Bla 15 32 53.780 +30 20 59.41   19.1   15.7 17.819 ~ 155 1
87 ACO 2111 ClG 15 39 40.9 +34 25 04           ~ 188 0
88 NVSS J155603+662214 Rad 15 56 03.66 +66 22 13.7           ~ 3 1
89 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 192 0
90 [CGH98] J1556+6620 Rad 15 56 13.9 +66 20 53           ~ 1 0
91 [RCJ2002] J161543.3-060840 Rad 16 15 43.3 -06 08 40           ~ 2 1
92 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
93 PMN J1632+0531 Rad 16 32 42 +05 31.9           ~ 2 0
94 [CGH98] J1632+0531 Rad 16 32 42.5 +05 31 46           ~ 1 0
95 NVSS J163246+053434 Rad 16 32 46.9 +05 34 33   16.6       ~ 12 1
96 ACO 2204 ClG 16 32 47.7 +05 34 18           ~ 457 0
97 [LBG2007] ACO 2218 1 Rad 16 35 21.976 +66 13 19.71           ~ 6 0
98 5C 20.92 Rad 16 35 46.885 +66 14 50.87           ~ 3 0
99 NVSS J163546+661447 rG 16 35 47.3321206104 +66 14 44.487530016   20.105 18.517     ~ 16 0
100 5C 20.94 Rad 16 35 49.467 +66 15 27.47           ~ 3 0
101 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
102 Z 320-33 GiC 16 36 15.3699244272 +66 14 24.139733064   14.98       ~ 28 0
103 5C 20.101 Rad 16 36 15.402 +66 14 25.06           ~ 3 0
104 NVSS J164021+464247 rG 16 40 22.0239801888 +46 42 46.015604604   19.8       ~ 17 1
105 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
106 4C 67.26 Sy2 17 16 37.00897 +67 08 28.8480       22.000   ~ 19 1
107 ClG J1716+6708 ClG 17 16 49.6 +67 08 30           ~ 137 0
108 ACO 2259 ClG 17 20 09.2 +27 40 09           ~ 131 0
109 ClG J1720+2638 ClG 17 20 09.6 +26 37 35           ~ 284 0
110 [CGH98] J1722+3209 Rad 17 22 18.9 +32 09 18           ~ 1 0
111 ACO 2261 ClG 17 22 26.9 +32 07 58           ~ 370 0
112 ACO 2294 ClG 17 24 10.1 +85 53 09           ~ 69 0
113 ClG 2053-04 ClG 20 56 21.2 -04 37 46   21.0       ~ 168 0
114 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 151 0
115 NVSS J212709-120958 Rad 21 27 09.27 -12 10 01.5           ~ 132 1
116 [CGH98] J2127-1210 Rad 21 27 12.9 -12 09 45           ~ 1 0
117 NVSS J212940+000522 rG 21 29 39.953 +00 05 21.16           ~ 36 0
118 ClG J2129+0005 ClG 21 29 40.5 +00 05 47           ~ 308 0
119 FIRST J212955.7+000759 Rad 21 29 55.699 +00 07 59.26           ~ 2 0
120 ACO 2409 ClG 22 00 52.7 +20 58 27           ~ 101 0
121 [CGH98] J2201+2054 Rad 22 01 10.2 +20 55 04           ~ 1 0
122 [CGH98] J2237+0016 Rad 22 37 40.4 +00 16 46           ~ 1 0
123 ClG 2244.6-0222 ClG 22 47 12.2 -02 05 37           ~ 128 0
124 [CGH98] J2256+0531 Rad 22 56 43.8 +05 31 15           ~ 1 0
125 ACO 2507 ClG 22 57 06.1 +05 33 49           ~ 42 0
126 ACO 2631 ClG 23 37 40.7 +00 16 35           ~ 183 0
127 [MB89] ACO 2218 15 Rad ~ ~           ~ 1 0
128 [MB89] ACO 665 12 Rad ~ ~           ~ 1 0
129 [MB89] Cl 0016+16 14 Rad ~ ~           ~ 2 0
130 [MB89] ACO 665 17 Rad ~ ~           ~ 1 0
131 [MB89] ACO 665 21 Rad ~ ~           ~ 1 0
132 [MB89] ACO 2218 17 Rad ~ ~           ~ 1 0

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