A combined LOFAR and XMM-Newton analysis of the disturbed cluster PSZ2G113.91-37.01

M. G. Campitiello; A. Bonafede; A. Botteon; L. Lovisari; S. Ettori; G. Brunetti; F. Gastaldello; M. Rossetti; R. Cassano; A. Ignesti; R. J. van Weeren; M. Brüggen; M. Hoeft

arXiv · 2310.03645

A combined LOFAR and XMM-Newton analysis of the disturbed cluster PSZ2G113.91-37.01

M. G. Campitiello·A. Bonafede·A. Botteon·L. Lovisari·S. Ettori·G. Brunetti·F. Gastaldello·M. Rossetti·R. Cassano·A. Ignesti·R. J. van Weeren·M. Brüggen·M. Hoeft

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Abstract

In this work, we investigated the interplay between the X-ray and radio emission of the cluster PSZ2G113.91-37.01 (z = 0.371) using the high-quality XMM-Newton observations of the CHEX-MATE project, and the images of the LoTSS-DR2. The cluster is undergoing a merger along the north-south axis, and shows a central radio halo and two radio relics, one in the southern and one in the northern regions. The analysis of the intracluster medium distribution revealed the presence of a northern surface brightness jump associated to the merger event. By extracting spectra across this discontinuity, we classified the edge as a cold front. Furthermore, we made use of upgraded Giant Metrewave Radio Telescope observations that allowed us to perform a spectral analysis of the G113 radio emission. We found evidence of re-acceleration of particles in the northern relic, and we measured an associated Mach number of M = 1.95 $\pm$ 0.01, as inferred from radio observations. We then performed a point-to-point analysis of the X-ray and radio emission both in the halo and in the northern relic regions. We found a strong correlation for the halo and an anti-correlation for the relic. The former behaviour is in agreement with previous studies. The relic anti-correlation is likely related to the reverse radial distribution of the X-ray (increasing towards the cluster centre) and radio (decreasing towards the cluster centre) emissions. Finally, we performed a point-to-point analysis of the radio emission and the residuals obtained by subtracting a double beta model to the X-ray emission. We found a strong correlation between the two quantities. This behaviour suggests the presence of a connection between the process responsible for the radio emission and the one that leaves fluctuations in the X-ray observations.

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M. G. Campitiello, A. Bonafede, A. Botteon, L. Lovisari, S. Ettori, G. Brunetti, F. Gastaldello, M. Rossetti, R. Cassano, A. Ignesti, R. J. van Weeren, M. Brüggen, M. Hoeft. 2023-10-05. A combined LOFAR and XMM-Newton analysis of the disturbed cluster PSZ2G113.91-37.01. https://arxiv.org/abs/2310.03645

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