RADIO GALAXY FEEDBACK IN X-RAY-SELECTED GROUPS FROM COSMOS: THE EFFECT ON THE INTRACLUSTER MEDIUM

Journal Article · Sat May 01 00:00:00 EDT 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/714/1/218· OSTI ID:21448945

Giodini, S; Finoguenov, A; Boehringer, H; Pierini, D ^[1]; Smolcic, V; Massey, R ^[2]; BIrzan, L ^[3]; Zamorani, G ^[4]; Oklopcic, A ^[5]; Pratt, G W ^[6]; Schinnerer, E ^[7]; Koekemoer, A M ^[8]; Salvato, M ^[9]; Sanders, D B; Kartaltepe, J S ^[10]; Thompson, D ^[11]

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1. Max Planck Institut fuer Extraterrestrische Physik, Giessenbachstrasse, Garching bei Muenchen D-85748 (Germany)
2. California Institute of Technology, MC 105-24, 1200 East California Boulevard, Pasadena, CA 91125 (United States)
3. Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA, Leiden (Netherlands)
4. INAF Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy)
5. University of Zagreb, Physics Department, Bijenicka cesta 32, 10000 Zagreb (Croatia)
6. Laboratoire AIM, IRFU/Service d'Astrophysique - CEA/DSM - CNRS - Universite Paris Diderot, Bt. 709, CEA-Saclay, F-91191, Gif-sur-Yvette Cedex (France)
7. Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany)
8. Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)
9. Excellence Cluster 'Universe' and IPP-Max Planck institute for Plasma Physics Boltzmann Strasse 2, Garching 85748 (Germany)
10. Institute for Astronomy, University of Hawaii 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)
11. Large Binocular Telescope Observatory, University of Arizona, Tucson, AZ 85721 (United States)

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.

• OSTI ID: 21448945
• Journal Information: Astrophysical Journal, Vol. 714, Issue 1; Other Information: DOI: 10.1088/0004-637X/714/1/218; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ENTROPY
GALAXY CLUSTERS
GALAXY NUCLEI
RADIO GALAXIES
UNIVERSE
X-RAY GALAXIES
COSMIC RADIO SOURCES
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
GALAXIES
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES