CLUSTERS IN PREHEATING SIMULATION AND ITS EFFECT ON CMB SPECTRUM | Zendy

Kai-Yang Lin | Zendy; Tak-Pong Woo | Zendy; YaoHuan Tseng | Zendy; Lihwai Lin | Zendy; Tzihong Chiueh | Zendy

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CLUSTERS IN PREHEATING SIMULATION AND ITS EFFECT ON CMB SPECTRUM

Author(s) -

Kai-Yang Lin,

Tak-Pong Woo,

YaoHuan Tseng,

Lihwai Lin,

Tzihong Chiueh

Publication year - 2004

Publication title -

modern physics letters a

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.49

H-Index - 88

eISSN - 1793-6632

pISSN - 0217-7323

DOI - 10.1142/s0217732304014331

Subject(s) - physics , anisotropy , cosmic microwave background , astrophysics , normalization (sociology) , luminosity , computational physics , quantum mechanics , galaxy , sociology , anthropology

We report an instantaneous heating scheme at z=2 that can produce bound objects obeying the observed mass-temperature and luminosity-temperature relations. Such heating reduces the Sunyaev–Zeldovich (SZ) flux by a factor 3–2 on scale of 4–6 arcminutes. It exacerbates the need for the matter-fluctuation normalization to σ8 to assume an exceedingly high value (~1.2), if the several-arcminute excess anisotropy detected by the CBI experiment is entirely caused by the SZ effect of inter-galactic hot gas. By contrast, we find that the several-arcminute excess detected by ACBAR can be consistent with the preheated SZ signals of σ8=1.

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