Physics
Scientific paper
Aug 1973
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973pthph..50..472n&link_type=abstract
Progress of Theoretical Physics, Vol. 50, No. 2, pp. 472-487
Physics
2
Scientific paper
In order that galaxies may be formed from the primordial turbulence in a big-bang universe, the cosmic turbulence with suitable scales must survive up to the decoupling epoch of matter from radiation against its decay due to the generation of sound as envisaged by Lighthill and Crighton. To attack the problem with due consideration of the effect of cosmic expansion neglected in the Lighthill-Crighton theory, the generation of sound from the cosmic turbulence is dealt with by constructing the appropriate retarded Green's function in which all significant influences of the cosmic expansion upon the propagation of sound waves to be generated are woven. It is shown that the expanding turbulent fluid is inevitably of a diffusive nature in such a way that its physical radius is equal to the acoustical even horizon. The latter situation means that the retardation effect is essential in the evaluation of the intensity of sound at the center of the turbulent fluid sphere, while the effect was discarded in the Crighton formula for a static diffusive medium. In other words, our formalism is superior to Crighton's for the examination of the aforementioned problem.
No associations
LandOfFree
On the Generatin of Sound from the Primordial Turbulence in an Expanding Universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the Generatin of Sound from the Primordial Turbulence in an Expanding Universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Generatin of Sound from the Primordial Turbulence in an Expanding Universe will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1222264