2014A&A...567A..93P


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.18CET09:02:58

2014A&A...567A..93P - Astronomy and Astrophysics, volume 567A, 93-93 (2014/7-1)

Counting gamma rays in the directions of galaxy clusters.

PROKHOROV D.A. and CHURAZOV E.M.

Abstract (from CDS):

Emission from active galactic nuclei (AGNs) and from neutral pion decay are the two most natural mechanisms that could establish a galaxy cluster as a source of gamma rays in the GeV regime. We revisit this problem by using 52.5 months of Fermi-LAT data above 10GeV and stacking 55 clusters from the HIFLUCGS sample of the X-ray brightest clusters. The choice of >10GeV photons is optimal from the point of view of angular resolution, while the sample selection optimizes the chances of detecting signatures of neutral pion decay, arising from hadronic interactions of relativistic protons with an intracluster medium, which scale with the X-ray flux. In the stacked data we detected a signal for the central 0.25 deg circle at the level of 4.3σ. Evidence for a spatial extent of the signal is marginal. A subsample of cool-core clusters has a higher count rate of 1.9±0.3 per cluster compared to the subsample of non-cool core clusters at 1.3±0.2. Several independent arguments suggest that the contribution of AGNs to the observed signal is substantial, if not dominant. No strong support for the large contribution of pion decay was found. In terms of a limit on the relativistic proton energy density, we derived an upper limit of ≃2% relative to the gas thermal energy density, provided that the spectrum of relativistic protons is hard (s=4.1 in dN∝p–sd3p). This estimate assumes that relativistic and thermal components are mixed. For softer spectra the upper limits are weaker and equal to 3% for s=4.2, 4% for s=4.3, and 6% for s=4.4.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - gamma rays: galaxies: clusters - radiation mechanisms: non-thermal

Simbad objects: 119

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Number of rows : 119

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 IC 1531 rG 00 09 35.5577550180 -32 16 36.933264905   13.48   11.90   ~ 56 1
2 ACO 85 ClG 00 41 37.8 -09 20 33           ~ 776 0
3 QSO B0048-09 BLL 00 50 41.31738756 -09 29 05.2102688 16.74 16.39 16.22 16.14   ~ 415 2
4 QSO B0048-071 QSO 00 51 08.20981506 -06 50 02.2290926   19.0 19.5 19.07   ~ 97 1
5 2FGL J0055.0-2454 BLL 00 54 46.76 -24 55 29.0 17.06 16.85 16.78     ~ 31 0
6 ACO 119 ClG 00 56 16.8 -01 15 00           ~ 511 2
7 2MASS J00563227-2117081 BLL 00 56 32.2762336428 -21 17 08.123818902           ~ 20 1
8 2MASX J00591693-0150173 AGN 00 59 16.9273056123 -01 50 17.666228894   17.5       ~ 22 0
9 ACO 133 ClG 01 02 39.0 -21 57 15           ~ 328 1
10 4C 31.03 QSO 01 12 50.3327153078 +32 08 17.434986112     18.0 18.1   ~ 83 1
11 QSO B0116-219 QSO 01 18 57.2618928998 -21 41 30.144821503   19.40 19.0 19.37   ~ 89 1
12 2E 369 BLL 01 23 08.648 +34 20 48.56     15.2 16.8   ~ 87 0
13 NGC 507 BiC 01 23 39.950 +33 15 22.22   13.0       ~ 389 3
14 ACO 199 ClG 01 27 07 -17 47.5           ~ 15 0
15 ACO 400 ClG 02 57 37.4 +06 00 45           ~ 380 3
16 3C 75 PaG 02 57 41.64 +06 01 28.0           ~ 281 1
17 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 338 0
18 ICRF J025850.5+054108 QSO 02 58 50.5263987523 +05 41 08.036241640       19.46   ~ 21 1
19 ACO 401 ClG 02 58 56.9 +13 34 56           ~ 511 0
20 QSO B0306+101 QSO 03 09 03.62350016 +10 29 16.3409599   18.45   19.91   ~ 155 1
21 ACO 3112 ClG 03 17 52.4 -44 14 35           ~ 285 1
22 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1908 1
23 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3497 3
24 2FGL J0325.1-5635 Bla 03 25 22.60 -56 29 04.8       17.9   ~ 26 0
25 NAME WISEA J033513.88-445943.8 BLL 03 35 14.500 -44 59 29.00           ~ 24 0
26 3FHL J0338.5+1302 BLL 03 38 27 +13 04.7           ~ 19 0
27 ACO S 373 ClG 03 38 30 -35 27.3           ~ 1509 0
28 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 340 1
29 2MASX J03411752+1523477 BiC 03 41 17.5325964402 +15 23 47.585740854   17.5       ~ 40 1
30 ACO 3158 ClG 03 42 39.6 -53 37 50           ~ 265 0
31 2FGL J0414.9-0855 gam 04 15 23.17 -08 54 27.0           ~ 10 0
32 QSO B0414+009 BLL 04 16 52.4945787354 +01 05 23.896410061   16.86 16.38 16   ~ 239 0
33 NGC 1550 BiC 04 19 37.921 +02 24 35.58   14.0       ~ 147 1
34 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1029 3
35 QSO B0422+004 BLL 04 24 46.8423020674 +00 36 06.327828096 16.15 15.94 16.98     ~ 318 1
36 ClG 0422-09 ClG 04 25 51.02 -08 33 38.5           ~ 82 0
37 ACO 3376 ClG 06 01 42.1521 -39 59 06.227           ~ 263 0
38 3FHL J0602.7-4019 BLL 06 02 50.79 -40 18 51.0           ~ 25 0
39 3FGL J0626.0-5436 QSO 06 25 52.2307756225 -54 38 50.717245488       18.95   ~ 34 0
40 ACO 3391 ClG 06 26 15.4 -53 40 52           ~ 167 1
41 ACO 3395 ClG 06 27 31.1 -54 23 58           ~ 174 0
42 3FHL J0647.0-5138 BLL 06 47 10.100 -51 35 46.00           ~ 19 0
43 6C 070609+591309 BLL 07 10 30.0681446132 +59 08 20.369016804   17.38 16.52 15.1   ~ 177 2
44 ACO 576 ClG 07 21 24.1 +55 44 20           ~ 281 1
45 6C 073840+545153 QSO 07 42 39.7902437769 +54 44 24.660079322     16.90     ~ 89 1
46 ICRF J085641.8-110514 BLL 08 56 41.80414812 -11 05 14.4301901 18.30 17.90 17.29 16.66   ~ 47 0
47 NAME CRATES-VA J0906-0905 BLL 09 06 18.07 -09 05 44.9 17.90 17.85 17.37     ~ 26 0
48 ACO 754 ClG 09 08 50.1 -09 38 12           ~ 628 1
49 NAME Hydra I Cluster ClG 10 36 36.0 -27 31 04           ~ 767 1
50 ICRF J114207.7+154754 QSO 11 42 07.7391115626 +15 47 54.159097974   20.1   19.5   ~ 36 1
51 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 980 1
52 2MASS J11540456-0010096 BLL 11 54 04.5562766753 -00 10 09.868842376   19.08 18.62     ~ 58 0
53 NAME NGC 4073 Group GrG 12 04 21.7 +01 50 19     13.53     ~ 241 0
54 ZwCl 1215+0400 ClG 12 17 40.6 +03 39 45           ~ 101 0
55 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5275 1
56 NGC 4636 LIN 12 42 49.867 +02 41 16.01   12.62 11.84     ~ 1032 1
57 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 961 2
58 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2661 2
59 ACO 1650 ClG 12 58 36.76 -01 43 34.2           ~ 265 0
60 ACO 1651 ClG 12 59 22.43 -04 11 47.1           ~ 269 0
61 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4146 2
62 LBQS 1308+0051 BLL 13 11 06.4763559642 +00 35 10.045366894   18.53 18.01     ~ 39 0
63 [VV2006] J131250.9-042451 QSO 13 12 50.90124457 -04 24 49.8914608     18.7 19.29   ~ 42 0
64 NGC 5044 BiC 13 15 23.969 -16 23 08.00   11.9   10.74   ~ 445 0
65 QSO B1313-333 QSO 13 16 07.98593995 -33 38 59.1725057   18.04 20.0 17.23   ~ 216 1
66 ACO 3558 ClG 13 27 54.8 -31 29 32           ~ 403 2
67 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 280 1
68 2FGL J1345.8-3356 BLL 13 45 42.95 -33 56 43.6           ~ 21 0
69 2MASS J13470688-2958424 BLL 13 47 06.8793402438 -29 58 42.453934558           ~ 21 0
70 ACO 3571 ClG 13 47 28.9 -32 51 57           ~ 261 2
71 2FGL J1351.1-2749 Bz? 13 51 10 -27 43.2           ~ 10 0
72 2FGL J1406.2-2510 BLL 14 06 09.623 -25 08 09.51           ~ 21 0
73 IC 4374 QSO 14 07 29.76224452 -27 01 04.2931696   13.61   11.79   ~ 118 3
74 ACO 3581 ClG 14 07 29.8 -27 01 04           ~ 162 3
75 QSO B1406-267 QSO 14 09 50.16977926 -26 57 36.9798902   21.94   20.51   ~ 48 1
76 2MASX J14161218-2418140 Bla 14 16 12.1762988137 -24 18 13.500448395   17.95   16.36   ~ 21 0
77 NAME NGC 5718 Group ClG 14 40 38.5 +03 28 20     14.31     ~ 102 0
78 2MASS J14405293+0610162 BLL 14 40 52.9390666258 +06 10 16.191656014 17.77 17.41 17.34     ~ 42 1
79 ICRF J150506.4+032630 Sy1 15 05 06.47715917 +03 26 30.8126616   19.02 18.62 17.72   ~ 188 1
80 2FGL J1506.6+0806 BLL 15 06 44.4735994977 +08 14 00.721010372       17   ~ 27 0
81 2MASX J15084264+2709081 BLL 15 08 42.6151435153 +27 09 07.721174390     18.5 17.9   ~ 32 0
82 ACO 2029 ClG 15 10 58.7 +05 45 42           ~ 843 0
83 ICRF J151215.7+020316 Sy2 15 12 15.7419237172 +02 03 16.969705919   18.94 18.31 16.6   ~ 95 1
84 ACO 2059 ClG 15 20.2 +28 54           ~ 17 0
85 NAME NGC 5920 Group ClG 15 21 50.7 +07 42 18     15.13     ~ 281 0
86 7C 1520+3154 QSO 15 22 09.99172973 +31 44 14.3819060   20.45 19.89 19.87   ~ 128 1
87 ACO 2065 ClG 15 22 42.6 +27 43 21           ~ 337 0
88 ACO 2063 ClG 15 23 01.8 +08 38 22           ~ 367 2
89 ICRF J153939.1+274438 QSO 15 39 39.1373725234 +27 44 38.197606739   19.13 18.76 17.29   ~ 60 1
90 3FHL J1548.4+1456 BLL 15 48 24.38904 +14 57 02.7576           ~ 21 0
91 QSO B1551+130 QSO 15 53 32.6979155757 +12 56 51.714849889   18.05 17.65 17.1   ~ 123 1
92 ACO 2147 ClG 16 02 17.2 +15 53 43           ~ 369 0
93 [VV2006] J160338.0+155403 QSO 16 03 38.06194126 +15 54 02.3552149   18.5 13.97 12.15   ~ 54 2
94 4C 15.54 BLL 16 07 06.4310811643 +15 51 34.489313092   20.15 19.49 17.5   ~ 141 2
95 ACO 2199 ClG 16 28 37.0 +39 31 28           ~ 1089 1
96 4C 38.41 QSO 16 35 15.492970280 +38 08 04.50062279   18.14 17.97 17.25   ~ 736 1
97 6C 163852+395305 QSO 16 40 29.632771800 +39 46 46.02850331   18.4 16.5 18.75   ~ 267 2
98 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1539 2
99 ACO 2256 ClG 17 03 43.5 +78 43 03           ~ 825 1
100 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 496 0
101 8C 1803+784 BLL 18 00 45.6831135718 +78 28 04.017792333   16.4 16.4 15.46   ~ 652 1
102 3FHL J1955.0-5640 BLL 19 55 03.100 -56 40 31.01           ~ 17 0
103 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 559 1
104 ACO S 1101 ClG 23 13 58.5 -42 43 39           ~ 229 1
105 3FHL J2317.3-4532 BLL 23 17 31.500 -45 34 03.00           ~ 17 0
106 MCG-07-47-031 BLL 23 19 05.8960426344 -42 06 48.342680946   16.60 15.46     ~ 88 1
107 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 292 1
108 6dFGS gJ232444.7-404050 BLL 23 24 44.6723561000 -40 40 49.442114200 15.88 15.72 15.54 16.84   ~ 45 0
109 87GB 232308.5+162905 BLL 23 25 38.112 +16 46 42.85           ~ 16 0
110 2FGL J2327.9-4037 QSO 23 28 19.2646254718 -40 35 09.848628351   19.5 18.5     ~ 27 1
111 ACO 2634 ClG 23 38 18.4 +27 01 37           ~ 474 2
112 ACO 2637 ClG 23 38 57.80 +21 25 55.2           ~ 32 0
113 ACO 2657 ClG 23 44 51.0 +09 08 40           ~ 257 3
114 ICRF J234639.9+070506 BLL 23 46 39.9337130819 +07 05 06.856587670   17.0 16.5     ~ 35 1
115 ACO 4038 ClG 23 47 31.1 -28 12 10           ~ 309 3
116 [VV2006] J235021.5-300039 QSO 23 50 21.5361708828 -30 00 38.866369359   19.20       ~ 22 0
117 ICRF J235347.4-303748 BLL 23 53 47.45886169 -30 37 48.5027876     18.0 16.6   ~ 41 1
118 ACO 4059 ClG 23 56 40.7 -34 40 18           ~ 346 1
119 QSO B2356-309 BLL 23 59 07.9032684889 -30 37 40.667900741   18.414 16.44 16.795   ~ 244 1

    Equat.    Gal    SGal    Ecl

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2020.02.18-09:02:58

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