Spectral line profile of turbulent gas
نویسندگان
چکیده
منابع مشابه
Spectral theory of the turbulent mean-velocity profile.
It has long been surmised that the mean-velocity profile (MVP) of pipe flows is closely related to the spectrum of turbulent energy. Here we perform a spectral analysis to identify the eddies that dominate the production of shear stress via momentum transfer. This analysis allows us to express the MVP as a functional of the spectrum. Each part of the MVP relates to a specific spectral range: th...
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The star formation rate in galaxies should be related to the fraction of gas that can attain densities large enough for gravitational collapse. In galaxies with a turbulent interstellar medium, this fraction is controlled by the effective barotropic index γ = dlogP/dlogρ which measures the turbulent compressibility. When the cooling timescale is smaller than the dynamical timescale, γ can be ev...
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The electronic absorption spectral line shape of a diatomic molecule with harmonic potential curves is calculated using the time correlation function formalism. Both the equilibrium shift and the frequency shift of the two linking electronic states ate taken into account. The spectrum is also calculated using the cumulated expansion which is related to the correlation function of the time-d...
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ژورنال
عنوان ژورنال: Applied Optics
سال: 1987
ISSN: 0003-6935,1539-4522
DOI: 10.1364/ao.26.001579