Journal article
ClG 0217+70: A massive merging galaxy cluster with a large radio halo and relics
Astronomy and astrophysics (Berlin), Vol.642, p.L3
10/01/2020
DOI: 10.1051/0004-6361/202039028
Abstract
We present an analysis of archival Chandra data of the merging galaxy cluster ClG 0217+70. The FeXXV He alpha X-ray emission line is clearly visible in the 25 ks observation, allowing a precise determination of the redshift of the cluster as z=0.180 +/- 0.006. We measure kT(500)=8.3 +/- 0.4 keV and estimate M-500=(1.06 +/- 0.11) x 10(15) M-circle dot based on existing scaling relations. Correcting both the radio and X-ray luminosities with the revised redshift reported here, which is much larger than previously inferred based on sparse optical data, this object is no longer an X-ray underluminous outlier in the L-X-P-radio scaling relation. The new redshift also means that, in terms of physical scale, ClG 0217+70 hosts one of the largest radio halos and one of the largest radio relics known to date. Most of the relic candidates lie in projection beyond r(200). The X-ray morphological parameters suggest that the intracluster medium is still dynamically disturbed. Two X-ray surface brightness discontinuities are confirmed in the northern and southern parts of the cluster, with density jumps of 1.40 +/- 0.16 and 3.0 +/- 0.6, respectively. We also find a 700x200 kpc X-ray faint channel in the western part of the cluster, which may correspond to compressed heated gas or increased non-thermal pressure due to turbulence or magnetic fields.
Details
- Title: Subtitle
- ClG 0217+70: A massive merging galaxy cluster with a large radio halo and relics
- Creators
- X. Zhang - Leiden UniversityA. Simionescu - Space Research Organisation NetherlandsJ. S. Kaastra - Leiden UniversityH. Akamatsu - Space Research Organisation NetherlandsD. N. Hoang - Universität HamburgC. Stuardi - University of BolognaR. J. van Weeren - Leiden UniversityL. Rudnick - University of MinnesotaR. P. Kraft - Center for Astrophysics Harvard & SmithsonianS. Brown - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Astronomy and astrophysics (Berlin), Vol.642, p.L3
- DOI
- 10.1051/0004-6361/202039028
- ISSN
- 0004-6361
- eISSN
- 1432-0746
- Publisher
- Edp Sciences S A
- Number of pages
- 5
- Grant note
- China Scholarship Council NWO, The Netherlands Organisation for Scientific Research; Netherlands Organization for Scientific Research (NWO) Netherlands Organisation for Scientific Research (NWO); Netherlands Organization for Scientific Research (NWO) 639.042.729 / VIDI research programme 714245 / ERC-StG DRANOEL AST17-14205 / US National Science Foundation; National Science Foundation (NSF)
- Language
- English
- Date published
- 10/01/2020
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428672202771
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