2017MNRAS.470.4638R

Query : 2017MNRAS.470.4638R

2017MNRAS.470.4638R - Mon. Not. R. Astron. Soc., 470, 4638-4645 (2017/October-1)

AMI SZ observation of galaxy-cluster merger CIZA J2242+5301: perpendicular flows of gas and dark matter.

RUMSEY C., PERROTT Y.C., OLAMAIE M., SAUNDERS R.D.E., HOBSON M.P., STROE A., SCHAMMEL M.P. and GRAINGE K.J.B.

Abstract (from CDS):

Arcminute Microkelvin Imager observations towards CIZA J2242+5301, in comparison with observations of weak gravitational lensing and X-ray emission from the literature, are used to investigate the behaviour of non-baryonic dark matter (NBDM) and gas during the merger. Analysis of the Sunyaev-Zel'dovich (SZ) signal indicates the presence of high pressure gas elongated perpendicularly to the X-ray and weak-lensing morphologies, which, given the merger-axis constraints in the literature, implies that high pressure gas is pushed out into a linear structure during core passing. Simulations in the literature closely matching the inferred merger scenario show the formation of gas density and temperature structures perpendicular to the merger axis. These SZ observations are challenging for modified gravity theories in which NBDM is not the dominant contributor to galaxy-cluster gravity.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: observational - techniques: interferometric - galaxies: clusters: individual - dark matter - large-scale structure of Universe - large-scale structure of Universe

Nomenclature: Table 1: [RPO2017] JHHMMSS.ss+DDMMSS.ss N=16.

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 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
2 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
3 ClG 0657-56 ClG 06 58 26.9 -55 58 21           ~ 1077 1
4 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
5 ACO 2146 ClG 15 56 04.7 +66 20 24           ~ 192 0
6 [RPO2017] J224133.09+531106.53 Rad 22 41 33.090 +53 11 06.53           ~ 1 0
7 [RPO2017] J224159.20+530358.13 Rad 22 41 59.200 +53 03 58.13           ~ 1 0
8 [RPO2017] J224204.18+530153.55 Rad 22 42 04.180 +53 01 53.55           ~ 1 0
9 [RPO2017] J224205.32+525931.82 Rad 22 42 05.320 +52 59 31.82           ~ 1 0
10 [RPO2017] J224225.77+525816.80 Rad 22 42 25.770 +52 58 16.80           ~ 1 0
11 [RPO2017] J224245.10+530807.81 Rad 22 42 45.100 +53 08 07.81           ~ 1 0
12 [RPO2017] J224247.49+530535.68 Rad 22 42 47.490 +53 05 35.68           ~ 1 0
13 [RPO2017] J224250.91+530044.05 Rad 22 42 50.910 +53 00 44.05           ~ 1 0
14 [RPO2017] J224252.55+530447.41 Rad 22 42 52.550 +53 04 47.41           ~ 1 0
15 CIZA J2242.8+5301 ClG 22 42 53.0 +53 01 05           ~ 228 0
16 [RPO2017] J224303.04+530747.38 Rad 22 43 03.040 +53 07 47.38           ~ 1 0
17 [RPO2017] J224304.65+525709.13 Rad 22 43 04.650 +52 57 09.13           ~ 1 0
18 [RPO2017] J224304.82+530206.71 Rad 22 43 04.820 +53 02 06.71           ~ 1 0
19 [RPO2017] J224316.84+530551.74 Rad 22 43 16.840 +53 05 51.74           ~ 1 0
20 [RPO2017] J224318.88+530715.74 Rad 22 43 18.880 +53 07 15.74           ~ 1 0
21 [RPO2017] J224337.38+530507.91 Rad 22 43 37.380 +53 05 07.91           ~ 1 0
22 [RPO2017] J224337.58+530916.11 Rad 22 43 37.580 +53 09 16.11           ~ 1 0

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