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Conference Papers Year : 2020

Linear stability of stellar rotating spheres

Jean-Baptiste Fouvry
  • Function : Author
Philip G. Breen
  • Function : Author
Anna Lisa Varri
  • Function : Author
Douglas C. Heggie
  • Function : Author

Abstract

Recent observations of globular clusters encourage to revise some aspects of the traditional paradigm, in which they were considered to be isotropic in velocity space and non-rotating. However, the theory of collisionless spheroids with some kinematic richness has seldom been studied. We present here a further step in this direction, owing to new results regarding the linear stability of rotating Plummer spheres, with varying anisotropy in velocity space and total amount of angular momentum. We extend the well-known radial orbit instability to rotating systems, and discover a new regime of instability in fast rotating, tangentially anisotropic systems.
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Dates and versions

insu-04054645 , version 1 (31-03-2023)

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Simon Rozier, Jean-Baptiste Fouvry, Philip G. Breen, Anna Lisa Varri, Christophe Pichon, et al.. Linear stability of stellar rotating spheres. Galactic Dynamics in the Era of Large Surveys, held 30 June - 5 July, 2019 in Shanghai, China. Proceedings of the International Astronomical Union, 2020, à renseigner, Unknown Region. pp.246-247, ⟨10.1017/S1743921319008184⟩. ⟨insu-04054645⟩
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