The influence of cooling and feedback on cluster pressure profiles

The influence of cooling and feedback on cluster pressure profiles

In this paper, a new set of 30 high resolution cosmological simulations of galaxy clusters, run with increasingly realistic physics, are presented and compared to observations of the Sunyaev‐Zel'dovich (SZ) effect. It is found that the best fit to the Y500‐M500 relation is from the model withou...

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Veröffentlicht in:Astronomische Nachrichten 2013-05, Vol.334 (4-5), p.398-401
Hauptverfasser: Pike, S.R., Kay, S.T., Newton, R.D.A.
Format: Artikel
Sprache:eng
Schlagworte:
Active galactic nuclei
Astronomical instruments
Astrophysics
Clusters
Computer simulation
Cooling effects
Cosmology
Feedback
galaxies: clusters: general
galaxies: clusters: intracluster medium
Gas cooling
methods: numerical
Reproduction
Stars & galaxies
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Zusammenfassung:In this paper, a new set of 30 high resolution cosmological simulations of galaxy clusters, run with increasingly realistic physics, are presented and compared to observations of the Sunyaev‐Zel'dovich (SZ) effect. It is found that the best fit to the Y500‐M500 relation is from the model without gas cooling, and that supernova feedback is insufficient to counteract the effect of cooling on the gas pressure. Clearly another more powerful source of feedback is required, suggesting that including the effects of active galactic nuclei (AGN) is vital if we are to replicate the SZ properties of the clusters accurately. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0004-6337
1521-3994
DOI:10.1002/asna.201211866