Interplay between relativistic and thermal plasma in relaxed galaxy clusters

Ignesti, Alessandro (2021) Interplay between relativistic and thermal plasma in relaxed galaxy clusters, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Astrofisica, 33 Ciclo. DOI 10.48676/unibo/amsdottorato/9827.
Documenti full-text disponibili:
[img] Documento PDF (English) - Richiede un lettore di PDF come Xpdf o Adobe Acrobat Reader
Disponibile con Licenza: Creative Commons Attribution Non-commercial No Derivatives 4.0 (CC BY-NC-ND 4.0) .
Download (49MB)


Galaxy clusters are complex ecosystems, where galaxies with powerful active galactic nuclei, thermal plasma, magnetic fields, and cosmic rays can interact and flourish in spectacular astrophysical phenomena. Decades of studies have investigated these systems, and as the boundaries of our knowledge were pushed forward, new questions emerged awaiting to be answered. The main focus of this Thesis is the interplay between the relativistic and thermal plasma of the intra-cluster medium. The study of the intra-cluster medium (ICM) allows to understand the way energy is injected from large scale dynamics and dissipated in different channels. These channels include viscous heating and the generation of non-thermal components that, eventually, generate diffuse radio emission. Furthermore, studying the ICM provides complementary insights into the physics of cluster galaxy evolution. We mainly focus on the case of relaxed galaxy clusters, where the connection between the central, massive, radio-loud galaxies and the diffuse radio emission is still unclear. In this context, we investigate also the interactions between the ICM and the cluster galaxies. The cornerstone of our works is a multi-wavelength analysis based on radio and X-ray observations, which features brand-new Low-Frequency Array (LOFAR) observations and new approaches to the study of the spatial correlation between these emissions.

Tipologia del documento
Tesi di dottorato
Ignesti, Alessandro
Dottorato di ricerca
Settore disciplinare
Settore concorsuale
Parole chiave
Astrophysics Extragalactic astronomy radio astronomy X-ray astronomy galaxy clusters
Data di discussione
24 Maggio 2021

Altri metadati

Statistica sui download

Gestione del documento: Visualizza la tesi