Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Statistics of CMB Fluctuations Induced by Topological Defects   We use the analytical model recently introduced in Ref. \cite{lp92}, to
investigate the statistics of temperature fluctuations on the cosmic microwave
background (CMB), induced by topological defects. The cases of cosmic strings
and textures are studied. We derive analytically the characteristic function of
the probability distribution for ${\delta T}\over T$ and use it to obtain the
lowest twelve moments including the skewness and the kurtosis. The distribution
function is also obtained and it is compared with the Gaussian distribution
thus identifying long non-Gaussian tails. We show that for both cosmic strings
and textures all odd moments (including skewness) vanish while the relative
deviation from the Gaussian for even moments increases with the order of the
moment. The non-Gaussian signatures of textures, derived from the distribution
function and the moments, are found to be much more prominent than the
corresponding signatures for strings. We discuss the physical origin of this
result.

12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg