Abstract
Three-dimensional degenerate pressure driven self-gravito-acoustic solitary waves (SGASWs) in a general (but realistic) self-gravitating degenerate quantum plasma (SGDQP) medium consisting of noninertial degenerate electron and inertial degenerate heavy and light ions/nuclei/elements are studied. The reductive perturbation method, which is valid for small but finite amplitude SGASWs, is employed to derive the (3 + 1)-dimensional cylindrical Korteweg-de-Vries equation (also known as the cylindrical Kadomtsev-Petviashvili equation) which admits a solitary wave solution. Two modes, namely, slow and fast are observed corresponding to different phase velocities. Both compressive (positive) and rarefactive (negative) SGASWs are found to exist in the SGDQP system for fast and slow modes. It has been shown that the presence of both degenerate light and heavy nuclei modifies the nature of SGASWs and allows both compressive and rarefactive SGASWs to exist in such a SGDQP medium. Moreover, the effects of the physical parameters on the SGASWs are discussed. The implication of our results for space and laboratory plasmas is briefly discussed.
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