2009A&A...494..429B

Query : 2009A&A...494..429B

2009A&A...494..429B - Astronomy and Astrophysics, volume 494429-442 (2009/2-1)

Double relics in Abell 2345 and Abell 1240. Spectral index and polarization analysis.

BONAFEDE A., GIOVANNINI G., FERETTI L., GOVONI F. and MURGIA M.

Abstract (from CDS):

The aim of the present work is to study the radio properties of double relics in Abell 1240 and Abell 2345 in the framework of double relic formation models. We present new Very Large Array observations at 20 and 90cm for these two clusters. We performed spectral index and polarization analysis and compared our results with expectations from theoretical models. The presence of double relics in these two cluster is confirmed by these new observations. Double relics in Abell 1240 show radio morphology, spectral index, and polarization values in agreement with ``outgoing merger shocks'' models. One of the relics of Abell 2345 shows a peculiar morphology and spectral index profile, which are difficult to reconcile with present scenarios. We suggest a possible origin for this peculiar relic.

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Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: Abell 1240 - galaxies: clusters: individual: Abell 2345 - radiation mechanisms: non-thermal - polarization - magnetic fields

Nomenclature: Table 1: [BGF2009] ACO 2345-N (Nos 1-2), [BGF2009] ACO 1240-N (Nos 1-2). Fig. 1: [BGF2009] ACO 2345-2 A (Nos A-F), [BGF2009] ACO 2345-1 A (No. G). Fig. 4: [BGF2009] ACO 2345 XN (Nos X1-X3). Fig. 6: [BGF2009] ACO 1240-1 A (Nos A to C). Text: [BGF2009] J21263466-1207214.

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 30

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Number of rows : 30
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 2744 ClG 00 14 20.03 -30 23 17.8           ~ 1077 0
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
3 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
4 ACO 3367 ClG 05 49 21 -24 28.1           ~ 34 0
5 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
6 NAME 0917+75 Relic rG 09 22 11.400 +74 59 31.00           ~ 15 0
7 Rood 27 ClG 09 25.7 +74 31           ~ 9 0
8 ACO 786 ClG 09 28 04.9 +74 46 58           ~ 43 0
9 [BGF2009] ACO 1240-1 Rad 11 23 25.00 +43 10 30.0           ~ 6 0
10 ACO 1240 ClG 11 23 37.7 +43 03 28           ~ 113 0
11 [BGF2009] ACO 1240-2 Rad 11 23 50.00 +43 00 20.0           ~ 6 0
12 EQ J1143+2002 Rad 11 43 02.98 +20 02 40.3           ~ 5 0
13 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1127 1
14 4C 31.38 Sy2 11 56 18.7420683840 +31 28 04.676598588   19.33 18.96     ~ 141 1
15 NAME Coma Relic Rad 12 55 +27.2           ~ 59 0
16 ACO 1656 ClG 12 59 44.40 +27 54 44.9           ~ 5141 2
17 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 118 0
18 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
19 ACO S 753 ClG 14 03 35.9 -33 59 16           ~ 91 1
20 NGC 5419 rG 14 03 38.7225244848 -33 58 41.881842120   11.77 11.33 10.21 14.44 ~ 208 3
21 ACO 2256 ClG 17 03 37.5 +78 37 23           ~ 928 1
22 ACO 2255 ClG 17 12 56.0 +64 04 06           ~ 605 0
23 ACO 3667 ClG 20 12 33.68 -56 50 26.3           ~ 676 1
24 QSO J2123+0535 Bla 21 23 44.51739933 +05 35 22.0930238   18.3 20.40 19.86   ~ 320 1
25 APMUKS (BJ) B212351.83-122025.2 rG 21 26 34.6496460408 -12 07 21.931472028           ~ 2 0
26 [BGF2009] ACO 2345-1 Rad 21 26 43.00 -12 07 50.0           ~ 5 0
27 ACO 2345 ClG 21 27 05.391 -12 09 07.41           ~ 151 0
28 NVSS J212709-120958 Rad 21 27 09.27 -12 10 01.5           ~ 132 1
29 [BGF2009] ACO 2345-2 Rad 21 27 36.00 -12 11 25.0           ~ 5 0
30 ICRF J213750.0-204231 Sy1 21 37 50.00785656 -20 42 31.6728477   20.400 19.4 19.286   ~ 102 1

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