Naslov
Radio Galaxy Feedback in X-ray-selected Groups from COSMOS: The Effect on the Intracluster Medium

Autori
Giodini, S. ; Smolčić, Vernesa ; 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.

Izvornik
The Astrophysical journal (0004-637X) 714 (2010), 1; 218-228

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
intergalactic medium; galaxies: active; galaxies: clusters: general; radio continuum: galaxies; X-rays: galaxies: clusters

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA