Nonlinear pulsational mode dynamics in strongly correlated dust molecular clouds

Autor: Karabi Devi, Apratim Nag, Jaydeep Paul, Utpal Sarma, Pralay Kumar Karmakar
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Taibah University for Science, Vol 17, Iss 1 (2023)
Druh dokumentu: article
ISSN: 16583655
1658-3655
DOI: 10.1080/16583655.2023.2202605
Popis: 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.
Databáze: Directory of Open Access Journals
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