Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of Preheated Clusters on the CMB Spectrum   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.

10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics