Effects of preheated clusters on the CMB spectrum - INSPIRE

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Effects of preheated clusters on the CMB spectrum

Kai-Yang Lin
(
- Taiwan, Natl. Taiwan U.
)
,
Lihwai Lin
(
- Taiwan, Natl. Taiwan U.
)
,
Tak-Pong Woo
(
- Taiwan, Natl. Taiwan U.
)
,
Yao-Huan Tseng
(
- Taiwan, Natl. Taiwan U.
)
,
Tzihong Chiueh
(
- Taiwan, Natl. Taiwan U. and
- Taipei, Inst. Astron. Astrophys.
)

Oct, 2002

6 pages

Published in:

Astrophys.J.Lett. 608 (2004) L1-L4

e-Print:

astro-ph/0210323 [astro-ph]

DOI:

10.1086/422171

View in:

ADS Abstract Service

reference search13 citations

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Abstract: (arXiv)

Mounting evidence from

x

-ray observations reveals that bound objects should receive some form of energy in the past injected from non-gravitaional sources. We report that an instantaneous heating scheme, for which gases in dense regions were subjected to a temperature jump of 1keV at

z=2

whereas those in rarified regions remained intact, can produce bound objects obeying the observed mass-temperature and luminosity-temperature relations. Such preheating lowers the peak Sunyaev-Zeldovich (SZ) power by a factor of 2 and exacerbates the need for the normalization of matter fluctuations

\sigma_8

to assume an extreme high value

(\sim 1.1)

for the SZ signals to account for the excess anisotropy on 5-arcminute scale detected by the Cosmic Background Imager in the cosmic microwave background radiation.

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Figures(0)

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