Analytical Expressions for Spiral Arm Gravitational Potential and Density

Preprint

29 July 2002

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.astro-ph/0207635

Abstract

When modeling the three-dimensional hydrodynamics of interstellar material rotating in a galactic gravitational potential, it is useful to have an analytic expression for gravitational perturbations due to stellar spiral arms. We present such an expression for which changes in the assumed characteristics of the arms can be made easily and the sensitivity of the hydrodynamics to those characteristics examined. This analytic expression also makes it easy to rotate the force field at the pattern angular velocity with little overhead on the calculations.

Keywords

GRAVITATIONAL POTENTIAL
GALACTIC GRAVITATIONAL
ANALYTIC EXPRESSION
MATERIAL ROTATING
ARM GRAVITATIONAL
HYDRODYNAMICS
SPIRAL ARM
ARMS

All Related Versions

Version 1, 2002-07-29, ArXiv
Published version: The Astrophysical Journal Supplement Series, 142 (2), 261.

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