Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Clustering of the Diffuse Infrared Light from the COBE DIRBE maps. An
  all-sky survey of $C(0)$   We measure the smoothness of the infrared sky using the COBE DIRBE maps, and
obtain interesting limits on the production of the diffuse cosmic infrared
background (CIB) light by matter clustered like galaxies. The predicted
fluctuations of the CIB with the DIRBE beam size of 0.7\deg\ are of the order
of 10\%, and the maps are smooth at the level of $\delta\nu I_\nu \sim $ a few
\nwm2sr rms from 2.2 to 100 \um. The lowest numbers are achieved at mid- to
far-IR where the foreground is bright but smooth; they are
$\sqrt{C(0)}$$\leq$$(1-1.5)$ \nwm2sr at $\lambda=$ 10-100 \um. If the CIB comes
from clustered matter evolving according to typical scenarios, then the
smoothness of the maps implies CIB levels less than $\sim (10-15) $ \nwm2sr
over this wavelength range.

30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ