Stellar Filaments in Self-Interacting Brans-Dicke Gravity

TL;DR

This study explores cylindrically symmetric stellar filaments within self-interacting Brans-Dicke gravity, deriving generalized models and analyzing their stability through radial oscillations influenced by the scalar field and polytropic index.

Contribution

It introduces generalized polytropic filament models in Brans-Dicke gravity and examines their stability, extending previous models in general relativity with new scalar field effects.

Findings

Models depend on cosmological constant, polytropic index, and scalar field.

Stability determined solely by the adiabatic index.

Filament fragmentation analyzed via radial oscillations.

Abstract

This paper is devoted to study cylindrically symmetric stellar filaments in self-interacting Brans-Dicke gravity. For this purpose, we construct polytropic filamentary models through generalized Lane-Emden equation in Newtonian regime. The resulting models depend upon the values of cosmological constant (due to scalar field) along with polytropic index and represent a generalization of the corresponding models in general relativity. We also investigate fragmentation of filaments by exploring the radial oscillations through stability analysis. This stability criteria depends only upon the adiabatic index.