Nonlinear pulsational mode dynamics in strongly correlated dust molecular clouds

We theoretically study the nonlinear pulsational mode dynamics in strongly correlated (viscoelastic) self-gravitating complex charge-fluctuating dust molecular clouds (DMCs) on the astrophysical spatiotemporal scales. A nonlinear normal mode (local) analysis results in a unique pair of extended Kortweg de-Vries-Burgers (KdV-B) equations on the conjugational gravito-electrostatic potential fluctuations in a mixed form. The KdV-B system is numerically analysed in a wide-range parametric window relevant to realistic astronomical DMC circumstances. It is found that the fluctuation dynamics evolves as solitary-chain patterns. The electrostatic fluctuation amplitude increases with the referral frame velocity; whereas, the gravitational fluctuations are insensitive to this velocity. The fluctuation dynamics are found to be independent of variation in the equilibrium dust density, equilibrium dust charge, dust mass, and so forth. The validation and reliability checkup of our results is highlighted in fair corroboration with the literature. Our results could be useful in understanding the mechanism behind bounded structure formation via the non-local self gravitational collapse dynamics.

Automated summary

We theoretically study the nonlinear pulsational mode dynamics in strongly correlated (viscoelastic) self-gravitating complex charge-fluctuating dust molecular clouds (DMCs) on the astrophysical spatiotemporal scales. A nonlinear normal mode (local) analysis reveals a unique pair of extended Kortweg de-Vries-Burgers (KdV-B) equations on the conjugational gravito-electrostatic potential fluctuations in a mixed form. Numerical analysis of the KdV-B system within a wide-range parametric window relevant to realistic astronomical DMC circumstances demonstrates the evolution of solitary-chain patterns in fluctuation dynamics. Our results show that the amplitude of electrostatic fluctuations increases with the reference frame velocity, while gravitational fluctuations are unaffected by this velocity. Additionally, the fluctuation dynamics are found to be independent of various factors such as equilibrium dust density, equilibrium dust charge, and dust mass. The validation and reliability of our results are emphasized through comparison with existing literature. Our findings are crucial for understanding the mechanism behind bounded structure formation through non-local self-gravitational collapse dynamics.