E-viri
PDF
Recenzirano
Odprti dostop
-
Giodini, S; Smolčić, V; Finoguenov, A; Boehringer, H; Bîrzan, L; Zamorani, G; Oklopčić, A; Pierini, D; Pratt, G. W; Schinnerer, E; Massey, R; Koekemoer, A. M; Salvato, M; Sanders, D. B; Kartaltepe, J. S; Thompson, D
The Astrophysical journal, 05/2010, Letnik: 714, Številka: 1Journal Article
We quantify the importance of the mechanical energy released by radio galaxies inside galaxy groups. We use scaling relations to estimate the mechanical energy released by 16 radio-active galactic nuclei located inside X-ray-detected galaxy groups in the COSMOS field. By comparing this energy output to the host groups' gravitational binding energy, we find that radio galaxies produce sufficient energy to unbind a significant fraction of the intragroup medium. This unbinding effect is negligible in massive galaxy clusters with deeper potential wells. Our results correctly reproduce the breaking of self-similarity observed in the scaling relation between entropy and temperature for galaxy groups.
