Spiral galaxies as gravitational plasmas

E. Griv; M. Gedalin; C. Yuan

doi:10.1016/j.asr.2006.05.019

Spiral galaxies as gravitational plasmas

E. Griv, M. Gedalin, C. Yuan

Department of Physics

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

This article reviews recent studies of dynamics of disk-shaped galaxies with special emphasis on their spiral structures. In a local version of kinetic stability theory, the very existence and the value of the critical wavelength of the spiral structure arising due to nonresonant Jeans-type instability of gravity perturbations is explained. A formal analogy between the collective oscillations in a rotating self-gravitating disk and the oscillations of a hot nonneutral plasma in a magnetic field is explored.

Original language	English
Pages (from-to)	47-56
Number of pages	10
Journal	Advances in Space Research
Volume	38
Issue number	1
DOIs	https://doi.org/10.1016/j.asr.2006.05.019
State	Published - 1 Jan 2006

Keywords

Galaxies: Kinematics and dynamics
Galaxies: Spiral galaxies
Galaxies: Structure
Waves and instabilities

ASJC Scopus subject areas

Aerospace Engineering
Astronomy and Astrophysics
Geophysics
Atmospheric Science
Space and Planetary Science
General Earth and Planetary Sciences

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10.1016/j.asr.2006.05.019

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title = "Spiral galaxies as gravitational plasmas",

abstract = "This article reviews recent studies of dynamics of disk-shaped galaxies with special emphasis on their spiral structures. In a local version of kinetic stability theory, the very existence and the value of the critical wavelength of the spiral structure arising due to nonresonant Jeans-type instability of gravity perturbations is explained. A formal analogy between the collective oscillations in a rotating self-gravitating disk and the oscillations of a hot nonneutral plasma in a magnetic field is explored.",

keywords = "Galaxies: Kinematics and dynamics, Galaxies: Spiral galaxies, Galaxies: Structure, Waves and instabilities",

author = "E. Griv and M. Gedalin and C. Yuan",

note = "Funding Information: We thank Tzi-Hong Chiueh, David Eichler, Yury Lyubarsky, Frank Shu, Irena Shuster, and Raphael Steinitz for many helpful discussions. The work was supported, in part, by the Israel Science Foundation, the Israeli Ministry of Immigrant Absorption in the framework of the programme “KAMEA”, the Binational U.S.–Israel Science Foundation, and the Academia Sinica in Taiwan.",

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AU - Gedalin, M.

AU - Yuan, C.

N1 - Funding Information: We thank Tzi-Hong Chiueh, David Eichler, Yury Lyubarsky, Frank Shu, Irena Shuster, and Raphael Steinitz for many helpful discussions. The work was supported, in part, by the Israel Science Foundation, the Israeli Ministry of Immigrant Absorption in the framework of the programme “KAMEA”, the Binational U.S.–Israel Science Foundation, and the Academia Sinica in Taiwan.

PY - 2006/1/1

Y1 - 2006/1/1

N2 - This article reviews recent studies of dynamics of disk-shaped galaxies with special emphasis on their spiral structures. In a local version of kinetic stability theory, the very existence and the value of the critical wavelength of the spiral structure arising due to nonresonant Jeans-type instability of gravity perturbations is explained. A formal analogy between the collective oscillations in a rotating self-gravitating disk and the oscillations of a hot nonneutral plasma in a magnetic field is explored.

AB - This article reviews recent studies of dynamics of disk-shaped galaxies with special emphasis on their spiral structures. In a local version of kinetic stability theory, the very existence and the value of the critical wavelength of the spiral structure arising due to nonresonant Jeans-type instability of gravity perturbations is explained. A formal analogy between the collective oscillations in a rotating self-gravitating disk and the oscillations of a hot nonneutral plasma in a magnetic field is explored.

KW - Galaxies: Kinematics and dynamics

KW - Galaxies: Spiral galaxies

KW - Galaxies: Structure

KW - Waves and instabilities

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SN - 0273-1177

VL - 38

SP - 47

EP - 56

JO - Advances in Space Research

JF - Advances in Space Research

IS - 1

ER -

Spiral galaxies as gravitational plasmas

Abstract

Keywords

ASJC Scopus subject areas

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