MeerKAT discovery of a double radio relic and odd radio circle: connecting cluster and galaxy merger shocks

被引：10

作者：

Koribalski, Baerbel S. ^{[1
,2
]}

Veronica, Angie ^{[3
]}

Dolag, Klaus ^{[4
,5
]}

Reiprich, Thomas H. ^{[3
]}

Brueggen, Marcus ^{[6
]}

Heywood, Ian ^{[7
,8
,9
]}

Andernach, Heinz ^{[10
,11
]}

Dettmar, Ralf-Juergen ^{[12
]}

Hoeft, Matthias ^{[11
]}

Zhang, Xiaoyuan ^{[13
]}

Bulbul, Esra ^{[13
]}

Garrel, Christian ^{[13
]}

Jozsa, Gyula I. G. ^{[14
]}

English, Jayanne ^{[15
]}

机构：

[1] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia

[2] Western Sydney Univ, Sch Sci, Locked Bag 1797, Penrith, NSW 2751, Australia

[3] Univ Bonn, Argelander Inst Astron AIfA, Aufdem Hugel 71, D-53121 Bonn, Germany

[4] Ludwig Maximilians Univ Munchen, Univ Sternwarte, Fak Phys, Scheinerstr 1, D-81679 Munich, Germany

[5] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85741 Garching, Germany

[6] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany

[7] Univ Oxford, Dept Phys, Astrophys, Keble Rd, Oxford OX1 3RH, England

[8] Rhodes Univ, Dept Phys & Elect, POB 94, ZA-6140 Makhanda, South Africa

[9] South African Radio Astron Observ, 2 Fir St, ZA-7925 Observatory, South Africa

[10] Univ Guanajuato, Dept Astron, DCNE, Callejonde Jalisco S-N, Guanajuato 36023, Mexico

[11] Thuringer Landessternwarte, Sternwarte 5, D-07778 Tautenburg, Germany

[12] Ruhr Univ Bochum, Astron Inst AIRUB, Fac Phys & Astron, D-44780 Bochum, Germany

[13] Max Planck Inst Extraterr Phys, Giessenbachstr 1, D-85748 Garching, Germany

[14] Max Planck Inst Radioastron, Aufdem Hugel 69, D-53121 Bonn, Germany

[15] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T2N2, Canada

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 531卷 / 03期

基金：

欧洲研究理事会;

关键词：

instrumentation: interferometers; galaxies: clusters: intracluster medium; intergalactic medium; radio continuum: galaxies; X-rays: galaxies: clusters; PHOTOMETRIC REDSHIFT CATALOG; X-RAY; SUPERNOVA REMNANT; DATA RELEASE; DA; 530; EMISSION; HALO; SYSTEM; I; SIMULATIONS;

D O I：

10.1093/mnras/stae1254

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the serendipitous discovery of (1) a large double radio relic associated with the galaxy cluster PSZ2 G277.93 + 12.34 and (2) a new odd radio circle, ORC J1027-4422, both found in the same deep MeerKAT 1.3 GHz wide-band radio continuum image. The angular separation of the two arc-shaped cluster relics is similar to 16 arcmin or similar to 2.6 Mpc for a cluster redshift of z approximate to 0.158. The thin southern relic, which shows several ridges/shocks including one possibly moving inwards, has a linear extent of similar to 1.64 Mpc. In contrast, the northern relic is about twice as wide, twice as bright, but only has a largest linear size of similar to 0.66 Mpc. Complementary SRG/eROSITA X-ray images reveal extended emission from hot intracluster gas between the two relics and around the narrow-angle tail (NAT) radio galaxy PMN J1033-4335 (z approximate to 0.153) located just east of the northern relic. The radio morphologies of the NAT galaxy and the northern relic, which are also detected with the Australian Square Kilometer Array Pathfinder (ASKAP) at 888 MHz, suggest both are moving in the same outward direction. The discovery of ORC J1027-4422 in a different part of the same MeerKAT image makes it the fourth known single ORC. It has a diameter of similar to 90 arcsec corresponding to 400 kpc at a tentative redshift of z approximate to 0.3 and remains undetected in X-ray emission. Supported by simulations, we discuss similarities between outward moving galaxy and cluster merger shocks as the formation mechanisms for ORCs and radio relics, respectively.

引用

页码：3357 / 3372

页数：16

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