2019ApJ...879..104L

Query : 2019ApJ...879..104L

2019ApJ...879..104L - Astrophys. J., 879, 104-104 (2019/July-2)

Contribution of radio halos to the foreground for SKA EoR experiments.

LI W., XU H., MA Z., HU D., ZHU Z., SHAN C., WANG J., GU J., ZHENG D., LIAN X., ZHENG Q., WANG Y., ZHU J. and WU X.-P.

Abstract (from CDS):

The overwhelming foreground contamination is one of the primary impediments to probing the Epoch of Reionization (EoR) through measuring the redshifted 21 cm signal. Among various foreground components, radio halos are less studied and their impacts on the EoR observations are still poorly understood. In this work, we employ the Press-Schechter formalism, merger-induced turbulent reacceleration model, and the latest SKA1-Low layout configuration to simulate the SKA "observed" images of radio halos. We calculate the one-dimensional power spectra from simulated images and find that radio halos can be about 104, 103, and 102.5 times more luminous than the EoR signal on scales of 0.1Mpc–1< k< 2Mpc–1 in the 120-128, 154-162, and 192-200 MHz bands, respectively. By examining the two-dimensional power spectra inside properly defined EoR windows, we find that the power leaked by radio halos can still be significant, as the power ratios of radio halos to the EoR signal on scales of 0.5Mpc–1≲k≲1Mpc–1 can be up to about 230%-800%, 18%-95%, and 7%-40% in the three bands when the 68% uncertainties caused by the variation of the number density of bright radio halos are considered. Furthermore, we find that radio halos located inside the far side lobes of the station beam can also impose strong contamination within the EoR window. In conclusion, we argue that radio halos are severe foreground sources and need serious treatments in future EoR experiments.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): dark ages, reionization, first stars - early universe - galaxies: clusters: intracluster medium - methods: data analysis - techniques: interferometric

Simbad objects: 80

goto Full paper

goto View the references in ADS

Number of rows : 80
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 ACO 2693 ClG 00 02 09 -19 33.3           ~ 6 0
2 ACO 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
3 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 517 0
4 ACO 2811 ClG 00 42 08.82 -28 32 08.8           ~ 78 0
5 ACO S 84 ClG 00 49 23.2 -29 31 33           ~ 89 0
6 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 296 0
7 ACO 141 ClG 01 05 37.183 -24 40 49.95           ~ 87 0
8 ZwCl 0104+5350 ClG 01 07 43.2 +54 08 43           ~ 35 0
9 ACO 209 ClG 01 31 52.9 -13 36 53           ~ 326 0
10 ClG 0217+70 ClG 02 17 00.0 +70 36 00           ~ 40 0
11 PLCKESZ G147.3-16.6 ClG 02 56 +40.3           ~ 10 0
12 ClG J0256+0006 ClG 02 56 32.9 +00 06 12           ~ 42 0
13 ACO 399 ClG 02 57 56.4 +13 00 59           ~ 420 0
14 ACO 401 ClG 02 58 50.3 +13 34 07           ~ 592 0
15 PLCKESZ G171.9-40.7 ClG 03 12 55 +08 22.8           ~ 58 0
16 MCS J0416.1-2403 ClG 04 16 08.380 -24 04 20.80           ~ 425 0
17 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
18 ACO 520 ClG 04 54 10.1 +02 55 38           ~ 465 0
19 ACO 523 ClG 04 59 01 +08 46.5           ~ 66 0
20 ACT-CL J0520.7-1328 ClG 05 20 42.0 -13 28 49           ~ 39 0
21 ACO 545 ClG 05 32 24.4152 -11 32 35.080           ~ 102 0
22 ACT-CL J0553.4-3342 ClG 05 53 27.200 -33 42 53.02           ~ 74 0
23 ZwCl 0634+4750 ClG 06 38 07.5 +47 47 27           ~ 48 0
24 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
25 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 511 0
26 SMACS J0723.3-7327 ClG 07 23 13.3 -73 27 25           ~ 252 0
27 ACO 665 ClG 08 30 45.2 +65 52 55           ~ 457 0
28 ACO 3411 ClG 08 41 47.7 -17 28 46           ~ 81 0
29 ACO 697 ClG 08 42 57.6 +36 21 45           ~ 277 0
30 ACO 754 ClG 09 09 14.8 -09 40 35           ~ 695 1
31 ACO 746 ClG 09 09 34.7638 +51 32 56.134           ~ 55 0
32 ACO 773 ClG 09 17 51.3 +51 43 20           ~ 308 0
33 ACO 781 ClG 09 20 25.4 +30 30 07           ~ 167 0
34 ACO 800 ClG 09 28 29 +37 47.9           ~ 18 0
35 ACO 851 ClG 09 43 01.2 +46 59 54   18.9       ~ 334 0
36 ZwCl 0947+1723 ClG 09 49 51.8 +17 07 05           ~ 92 0
37 ACO 1132 ClG 10 58 32.05 +56 47 14.2           ~ 145 1
38 ACO 1213 ClG 11 16 26.98 +29 16 23.9           ~ 155 0
39 ACO 1300 ClG 11 32 00.7 -19 53 34           ~ 168 0
40 ACO 1351 ClG 11 42 24.7795 +58 32 05.558           ~ 90 0
41 MCS J1149.5+2223 ClG 11 49 35.8 +22 23 55           ~ 546 0
42 PLCKESZ G287.0+32.9 ClG 11 50 49.20 -28 04 36.5           ~ 100 0
43 ACO 1443 ClG 12 01 12.1 +23 05 57           ~ 53 0
44 ACO 1451 ClG 12 03 17.3 -21 32 05           ~ 50 0
45 ACO 1550 ClG 12 29 02.5 +47 37 20           ~ 57 0
46 ZwCl 1231+1007 ClG 12 34 21.9 +09 47 02           ~ 72 0
47 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
48 ACO 1682 ClG 13 06 49.7 +46 32 59           ~ 149 1
49 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1178 0
50 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 118 0
51 MCXC J1332.7+5032 ClG 13 32 44.8 +50 32 24           ~ 134 0
52 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 337 1
53 ACO 1914 ClG 14 25 57.4 +37 49 54           ~ 338 0
54 ZwCl 1447+2619 ClG 14 49 28.2 +26 07 57           ~ 54 0
55 ACO 1995 ClG 14 52 55.0 +58 02 59           ~ 140 0
56 ACO 2034 ClG 15 10 03.9 +33 30 57           ~ 248 1
57 2MASX J15150305-1521537 ClG 15 14.9 -15 23           ~ 57 0
58 ACO 2061 ClG 15 21 19.90 +30 37 13.0           ~ 214 1
59 ACO 2065 ClG 15 22 22.7 +27 44 20           ~ 398 0
60 ACO 2069 ClG 15 24 02.92 +29 53 20.3           ~ 165 0
61 ACO 2142 ClG 15 58 26.5 +27 13 52           ~ 825 0
62 ACO 2163 ClG 16 15 46.1 -06 08 50           ~ 586 0
63 ACO 2218 ClG 16 35 54.0 +66 13 00           ~ 827 1
64 ACO 2219 ClG 16 40 22.1 +46 42 20           ~ 381 0
65 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
66 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
67 ACO 2254 ClG 17 17 45.90 +19 40 22.8           ~ 79 0
68 ACO 2294 ClG 17 24 10.1 +85 53 09           ~ 69 0
69 MCS J1752.0+4440 ClG 17 52 02.2 +44 40 38           ~ 68 0
70 ClG 1821+64 ClG 18 21 56.7276 +64 20 55.841           ~ 511 1
71 ACO 2319 ClG 19 21 14.0 +43 56 57           ~ 495 1
72 CIZA J1938.3+5409 ClG 19 38 18.6 +54 09 33           ~ 42 0
73 ACT-CL J2003.5-2323 ClG 20 03 32.3 -23 23 30           ~ 63 0
74 ACO 3888 ClG 22 34 26.3 -37 44 29           ~ 151 1
75 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0
76 ClG J2243-0935 ClG 22 43 21.1 -09 35 43           ~ 96 0
77 PSZ1 G108.18-11.53 ClG 23 22 28.2499 +48 44 29.172           ~ 36 0
78 ACO S 1121 ClG 23 25 12.2988 -41 11 45.461           ~ 46 0
79 PSZ1 G057.09-74.45 ClG 23 51 04.9 -19 54 48           ~ 12 0
80 ACO 2680 ClG 23 56 28 -21 02.3           ~ 7 0

To bookmark this query, right click on this link: simbad:objects in 2019ApJ...879..104L and select 'bookmark this link' or equivalent in the popup menu