▪ Abstract Turbulence affects the structure and motions of nearly all temperature and density regimes in the interstellar gas. This two-part review summarizes the observations, theory, and simulations of interstellar turbulence and their implications for many fields of astrophysics. The first part begins with diagnostics for turbulence that have been applied to the cool interstellar medium and highlights their main results. The energy sources for interstellar turbulence are then summarized along with numerical estimates for their power input. Supernovae and superbubbles dominate the total power, but many other sources spanning a large range of scales, from swing-amplified gravitational instabilities to cosmic ray streaming, all contribute in some way. Turbulence theory is considered in detail, including the basic fluid equations, solenoidal and compressible modes, global inviscid quadratic invariants, scaling arguments for the power spectrum, phenomenological models for the scaling of higher-order structu...
Interstellar Turbulence I: Observations and Processes
B. Elmegreen,John A. Center,D. O. Astronomy,U. Texas
Published 2004 in Annual Review of Astronomy and Astrophysics
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- Publication year
2004
- Venue
Annual Review of Astronomy and Astrophysics
- Publication date
2004-04-22
- Fields of study
Physics
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