The study of x-ray spectrum of the Coma cluster - Archive ouverte HAL
Pré-Publication, Document De Travail Année : 2023

The study of x-ray spectrum of the Coma cluster

L Zadorozhna
  • Fonction : Auteur
A Tugay
  • Fonction : Auteur
O Prikhodko
  • Fonction : Auteur
D Malyshev
  • Fonction : Auteur
Y Sahai
  • Fonction : Auteur
N Pulatova
  • Fonction : Auteur

Résumé

The X-ray spectrum of the Coma galaxy cluster was studied using the data from the XMM-Newton observatory. We combined 7 observations performed with the MOS camera of XMM-Newton in the 40'x 40' region centered at the Coma cluster. The analyzed observations were performed in 2000-2005 and have a total duration of 196 ksec. We focus on the analysis of the MOS camera spectra due to their lower affection by strong instrumental line-like background. The obtained spectrum was fitted with a model including contributions from the Solar system/Milky Way hot plasma and a power law X-ray background. The contribution of the instrumental background was modeled as a power law (not convolved with the effective area) and a number of Gaussian lines. The contribution from the Coma cluster was modeled with a single-temperature hot plasma emission. In addition, we searched for possible non-thermal radiation present in the vicinity of the center of the Coma cluster, originating e.g. from synchrotron emission of relativistic electrons on a turbulent magnetic field. We compared the results with previous works by other authors and spectra obtained from other instruments that operate in the similar energy range of 1-10 keV. Careful and detailed spectrum analysis shall be a necessary contribution to our future work - searching for axion-like particles' manifestations in the Coma cluster.

Dates et versions

hal-04312155 , version 1 (28-11-2023)

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L Zadorozhna, A Tugay, O Prikhodko, D Malyshev, Y Sahai, et al.. The study of x-ray spectrum of the Coma cluster. 2023. ⟨hal-04312155⟩
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