Modified amplitude of the gravitational wave spectrum
Abstract
The spectrum of thermal gravitational waves is obtained by including the highfrequency thermal gravitons created from extradimensional effects and is a new feature of the spectrum. The amplitude and spectral energy density of gravitational waves in a thermal vacuum state are found to be enhanced. The amplitude of the waves is 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 the thermal vacuum state does not exceed the upper bound put by the nucleosynthesis rate. The existence of cosmologically originated thermal gravitational waves due to extra dimension is not ruled out.
 Publication:

Classical and Quantum Gravity
 Pub Date:
 September 2012
 DOI:
 10.1088/02649381/29/17/175009
 arXiv:
 arXiv:1207.5962
 Bibcode:
 2012CQGra..29q5009G
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics
 EPrint:
 18 pages, 4 figures, to appear in Classical and Quantum Gravity. arXiv admin note: text overlap with arXiv:astroph/0503162, arXiv:astroph/0501329 by other authors