Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modified Amplitude of Gravitational Waves Spectrum   The spectrum of thermal gravitational waves is obtained by including the high
frequency thermal gravitons created from extra-dimensional effect and is a new
feature of the spectrum. The amplitude and spectral energy density of
gravitational waves in thermal vacuum state are found enhanced. The amplitude
of the waves get modified in the frequency range (10$^{-16}$ -10 $^{8}$ Hz) but
the corresponding spectral energy density is less than the upper bound of
various estimated results.
  With the addition of higher frequency thermal waves, the obtained spectral
energy density of the wave in thermal vacuum state does not exceed the upper
bound put by nucleosynthesis rate. The existence of cosmologically originated
thermal gravitational waves due to extra dimension is not ruled out.

37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys