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Sound Speed in a Random Flow and Turbulent Shifts of the Solar Eigenfrequencies  Andrei V. Gruzinov
;  Date: 
5 May 1997  Journal:  ApJ, 498 (1998), 458  Subject:  astroph  Abstract:  Perturbation theory is used to calculate the frequency shift of acoustic modes of an homogeneous turbulent fluid and the frequency shifts of solar modes due to turbulent convection. For sound waves in a random flow, the fractional frequency shift is +(11/30)M^2 in the longwavelength limit, and the shift at short wavelengths is (2/3)M^2, where M is the average Mach number of the flow. In our model of the solar convection, the lowdegree fmode shift is positive and unobservably small, whereas the fractional frequency shift at high degrees (lgg 500) is M^2, where M is the Mach number of convection near the solar surface.  Source:  arXiv, astroph/9705026  Services:  Forum  Review  PDF  Favorites 


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