The development of galaxy clusters is discussed basing on our Supermodel, that expresses in full the entropy-modulated, hydrostatic equilibrium of the intracluster plasma in the DM gravitational wells. We relate central entropy levels to energy injections by AGNs or deep mergers, and the outer entropy distribution to the accretion rates of DM and shocked intergalactic gas. We propose these to decline because of the cosmological slowdown in the outskirts growth at late cosmic times. Thus in addition to explaining the CC vs. NCC cores, we propose conditions leading to steep vs. shallow outer temperature declines, and outline related prospects for WFXT and IXO.
Probing the development of galaxy clusters in X rays / Cavaliere, A.; Fusco-Femiano, R.; Lapi, A.. - In: MEMORIE DELLA SOCIETÀ ASTRONOMICA ITALIANA SUPPLEMENTI. - ISSN 1824-0178. - 17:(2011), pp. 73-78. (Intervento presentato al convegno The Wide Field X-ray Telescope tenutosi a Bologna, italy nel 25-26 November 2009).
Probing the development of galaxy clusters in X rays
Lapi, A.
2011-01-01
Abstract
The development of galaxy clusters is discussed basing on our Supermodel, that expresses in full the entropy-modulated, hydrostatic equilibrium of the intracluster plasma in the DM gravitational wells. We relate central entropy levels to energy injections by AGNs or deep mergers, and the outer entropy distribution to the accretion rates of DM and shocked intergalactic gas. We propose these to decline because of the cosmological slowdown in the outskirts growth at late cosmic times. Thus in addition to explaining the CC vs. NCC cores, we propose conditions leading to steep vs. shallow outer temperature declines, and outline related prospects for WFXT and IXO.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
