Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Revealing the non-adiabatic nature of dark energy perturbations from
  galaxy clustering data   We study structure formation using relativistic cosmological linear
perturbation theory in the presence of intrinsic and relative (with respect to
matter) non-adiabatic dark energy perturbations. For different dark energy
models we assess the impact of non-adiabaticity on the matter growth promoting
a comparison with growth rate data. The dark energy models studied lead to
peculiar signatures of the (non)adiabatic nature of dark energy perturbations
in the evolution of the $f \sigma_{8}(z)$ observable. We show that
non-adiabatic DE models become close to be degenerated with respect to the
$\Lambda$CDM model at first order in linear perturbations. This would avoid the
identification of the non-adiabatic nature of dark energy using current
available data. Therefore, such evidence indicates that new probes are
necessary to reveal the non-adiabatic features in the dark energy sector.

3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio