The Planck clusters in the LOFAR sky V. LoTSS-DR2: Mass-radio halo power correlation at low frequency

被引：10
|
作者：
Cuciti, V. [1 ,2 ,3 ]
Cassano, R. [2 ]
Sereno, M. [10 ,11 ]
Brunetti, G. [2 ]
Botteon, A. [2 ]
Shimwell, T. W. [4 ,6 ]
Bruno, L. [1 ,2 ]
Gastaldello, F. [5 ]
Rossetti, M. [5 ]
Zhang, X. [7 ]
Simionescu, A. [4 ,8 ,9 ]
Brueggen, M. [3 ]
van Weeren, R. J. [4 ]
Jones, A. [3 ]
Akamatsu, H. [8 ]
Bonafede, A. [1 ,2 ]
De Gasperin, F. [2 ,3 ]
Di Gennaro, G. [3 ]
Pasini, T. [2 ]
Roettgering, H. J. A. [4 ]
机构：
[1] Univ Bologna, Dipartimento Fis & Astron, Via P Gobetti 93-2, I-40129 Bologna, Italy
[2] INAF, IRA, Via P Gobetti 101, I-40129 Bologna, Italy
[3] Univ Hamburg, Hamburger Sternwarte, Gojenbergsweg 112, D-21029 Hamburg, Germany
[4] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
[5] IASF Milano, INAF, Via A Corti 12, I-20133 Milan, Italy
[6] Netherlands Inst Radio Astron, ASTRON, Postbus 2, NL-7990 AA Dwingeloo, Netherlands
[7] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany
[8] SRON, Netherlands Inst Space Res, Niels Bohrweg 4, NL-2333 CA Leiden, Netherlands
[9] Univ Tokyo, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan
[10] INAF, Osservatorio Astrofis & Sci Spazio, Via P Gobetti 93-3, I-40129 Bologna, Italy
[11] INFN, Sez Bologna, Viale Berti Pichat 6-2, I-40127 Bologna, Italy
来源：
ASTRONOMY & ASTROPHYSICS | 2023年 / 680卷
基金：
英国科学技术设施理事会; 爱尔兰科学基金会;
关键词：
radiation mechanisms: non-thermal; galaxies: clusters: intracluster medium; galaxies: clusters: general; radio continuum: general; X-rays: galaxies: clusters; acceleration of particles; GALAXY CLUSTERS; LINEAR-REGRESSION; SCALING RELATIONS; COMA CLUSTER; SAMPLE; EMISSION; II;
D O I：
10.1051/0004-6361/202346755
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Context. Many galaxy clusters show diffuse cluster-scale emission in the form of radio halos, showing that magnetic fields and relativistic electrons are mixed in with the intracluster medium. There is in general agreement with the idea that the origin of radio halos is connected to turbulence generated during cluster mergers. Statistical studies of large samples of galaxy clusters in the radio band have the potential to unveil the connection between the properties of radio halos and the mass and dynamics of the host clusters.Aims. Previous studies were limited to massive clusters and were based on a small number of radio halos. The aim of this paper is to investigate the scaling relation between the radio power of radio halos and the mass of the host clusters at low frequencies and down to lower cluster masses.Methods. We analysed the clusters from the second catalogue of Planck Sunyaev-Zel'dovich sources that lie within the 5634 deg2 covered by the second Data Release of the LOFAR Two-meter Sky Survey. We derived the correlation between radio power and host cluster mass, and investigated the distribution of clusters without radio halos with respect to this correlation. We used X-ray observations to classify the dynamical state of clusters and investigated its effect on the power of radio halos.Results. Using different fitting methods, we found a correlation between the power of a radio halo at 150 MHz and the mass of its host cluster down to 3 x 10(14) M-circle dot. For comparison with previous works, with the Bivariate Correlated Errors and intrinsic Scatter (BCES) Y|X method, we obtained the slope of the correlation B = 3.55 +/- 0.60 and the normalisation A = 1.1 +/- 0.1. This correlation has a large scatter, part of which can be attributed to the different dynamical states of host clusters. We used two statistical tests to show that the distribution of clusters with and without (upper limits) radio halos in the mass-radio power diagram is not compatible with a single correlation and that it is also not compatible with clusters being uniformly distributed below the correlation.
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页数：12
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