Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropies and non-Gaussianity of the Cosmological Gravitational Wave
  Background   The Stochastic Gravitational Wave Background (SGWB) is expected to be a key
observable for Gravitational Wave (GW) interferometry. Its detection will open
a new window on early universe cosmology and on the astrophysics of compact
objects. Using a Boltzmann approach, we study the angular anisotropies of the
GW energy density, which is an important tool to disentangle the different
cosmological and astrophysical contributions to the SGWB. Anisotropies in the
cosmological background are imprinted both at its production, and by GW
propagation through the large-scale scalar and tensor perturbations of the
universe. The first contribution is not present in the Cosmic Microwave
Background (CMB) radiation (as the universe is not transparent to photons
before recombination), causing an order one dependence of the anisotropies on
frequency. Moreover, we provide a new method to characterize the cosmological
SGWB through its possible deviation from a Gaussian statistics. In particular,
the SGWB will become a new probe of the primordial non-Gaussianity of the
large-scale cosmological perturbations.

37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph