2021MNRAS.505.4762J

Query : 2021MNRAS.505.4762J

2021MNRAS.505.4762J - Mon. Not. R. Astron. Soc., 505, 4762-4774 (2021/August-3)

Radio relics in PSZ2 G096.88+24.18: a connection with pre-existing plasma.

JONES A., DE GASPERIN F., CUCITI V., HOANG D.N., BOTTEON A., BRUGGEN M., BRUNETTI G., FINNER K., FORMAN W.R., JONES C., KRAFT R.P., SHIMWELL T. and VAN WEEREN R.J.

Abstract (from CDS):

Giant radio relics are arc-like structures of diffuse, non-thermal synchrotron radiation that trace shock waves induced by galaxy cluster mergers. The particle (re-)acceleration mechanism producing such radio relics is unclear. One major open question is whether relics can be formed directly from a population of thermal seed electrons, or if pre-existing relativistic seed electrons are required. In some cases, active galactic nuclei (AGNs) can provide such a population of sub-GeV electrons. However, it is unclear how common this connection is. In this paper, we present LOFAR 140 MHz and Very Large Array L-band radio observations, as well as Chandra data of PSZ2 G096.88+24.18, a merging galaxy cluster system hosting a pair of radio relics. A large patch of diffuse emission connects a bright radio galaxy with one of the relics, likely affecting the properties of the relic. We find that the most plausible explanation for the connection is that the merger shock wave has passed over an AGN lobe. The shock passing over this seed population of electrons has led to an increased brightness in the relic only in the region filled with seed electrons.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: clusters: individual: PSZ2 G096.88+24.18 - galaxies: clusters: intracluster medium - large-scale structure of Universe

Nomenclature: Fig. 5, Table 3: [JDC2021] PSZ2 G096.88+24.18 W Relic (Nos N, S), [JDC2021] PSZ2 G096.88+24.18 S Relic W (Nos E, W).

Simbad objects: 22

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Number of rows : 22
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 ACT-CL J0102-4915 ClG 01 02 52.50 -49 14 58.0           ~ 296 0
2 ACO 521 ClG 04 54 08.6 -10 14 39           ~ 279 0
3 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 910 1
4 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
5 ACO 3376 ClG 06 01 25.000 -39 59 51.00           ~ 334 0
6 ClG J0717+3745 ClG 07 17 36.50 +37 45 23.0           ~ 511 0
7 ACO 3411 ClG 08 41 47.7 -17 28 46           ~ 81 0
8 ACO 3412 ClG 08 42 05 -17 35.8           ~ 22 0
9 PLCKESZ G287.0+32.9 ClG 11 50 49.20 -28 04 36.5           ~ 100 0
10 BAX 199.3086-25.5133 ClG 13 14 25.4 -25 15 44           ~ 118 0
11 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
12 Mrk 668 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 826 3
13 3C 295 Sy1 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 1021 4
14 ACO 2249 ClG 17 09 36.76 +34 28 04.1           ~ 136 0
15 MCS J1752.0+4440 ClG 17 52 02.2 +44 40 38           ~ 68 0
16 [JDC2021] PSZ2 G096.88+24.18 S Relic W Rad 18 56 20.0 +66 20 30           ~ 1 0
17 [JDC2021] PSZ2 G096.88+24.18 S Relic Rad 18 56 30.0 +66 20 00           ~ 2 0
18 [JDC2021] PSZ2 G096.88+24.18 N Relic Rad 18 56 30.0 +66 26 30           ~ 2 0
19 ZwCl 1856+6616 ClG 18 56 38.4 +66 23 10           ~ 48 0
20 [JDC2021] PSZ2 G096.88+24.18 S Relic E Rad 18 56 45.0 +66 19 30           ~ 1 0
21 QSO B2021+614 Bla 20 22 06.68174620 +61 36 58.8047323     19.00 17.58   ~ 335 1
22 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0

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