Journal
ASTROPHYSICAL JOURNAL
Volume 714, Issue 1, Pages 218-228Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/714/1/218
Keywords
intergalactic medium; galaxies: active; galaxies: clusters: general; radio continuum: galaxies; X-rays: galaxies: clusters
Categories
Funding
- DFG
- Owens Valley Radio Observatory
- National Science Foundation [AST-0838260]
- Unity through Knowledge Fund
- California Institute of Technology for generous support through NASA [1292462, 1344606]
- Science and Technology Facilities Council [PP/E006450/1] Funding Source: researchfish
- STFC [PP/E006450/1] Funding Source: UKRI
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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.
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