Radio galaxy feedback in X-ray selected groups from COSMOS: the effect on the ICM
Cosmology and Nongalactic Astrophysics
2015-05-18 v1
Abstract
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-AGN 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 intra-group 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.
Keywords
Cite
@article{arxiv.1002.4212,
title = {Radio galaxy feedback in X-ray selected groups from COSMOS: the effect on the ICM},
author = {S. Giodini and V. Smolcic and A. Finoguenov and H. Boehringer and L. Birzan and G. Zamorani and A. Oklopcic and D. Pierini and G. W. Pratt and E. Schinnerer and R. Massey and A. M. Koekemoer and M. Salvato and D. B. Sanders and J. S. Kartaltepe and D. Thompson},
journal= {arXiv preprint arXiv:1002.4212},
year = {2015}
}
Comments
Accepted for publication in the Astrophysical Journal. 12 Pages