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DYNAMICS OF LOCALIZED PACKETS OF SPIRAL DENSITYWAVES IN GASEOUS DISKS

  • George R. Mamatsashvili
  • George D. Chagelishvili
Part of the Astrophysics and Space Science Proceedings book series (ASSSP)

Abstract

We study the linear dynamics of spiral density wave packets (localized both in physical and wavenumber planes) in gaseous disks by the shearing sheet approximation using nonmodal approach combined with numerical calculations. The dynamics is determined by the disk flow non-normality and is well comprehended not in the physical, but in the wavenumber plane. Consequently, we do not use the classical characteristics of spectral analysis – corotation, Lindblad resonance –for the comprehension.

Keywords

Galactic Center Unstable Region Physical Plane Gaseous Disk Transient Growth 
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Copyright information

© Springer 2007

Authors and Affiliations

  • George R. Mamatsashvili
    • 1
  • George D. Chagelishvili
    • 1
  1. 1.Abastumani Astrophysical ObservatoryTbilisiGeorgia

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