Linear Perturbations in Filamentary Barotropic Molecular Clouds with Magnetic Fields

Details Linear Perturbations in Filamentary Barotropic Molecular Clouds with Magnetic Fields Linear Perturbations in Filamentary Barotropic Molecular Clouds with Magnetic Fields

Dec 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aas...185.8410g&link_type=abstract

American Astronomical Society, 185th AAS Meeting, #84.10; Bulletin of the American Astronomical Society, Vol. 26, p.1458

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We study linear perturbations in cylindrically symmetric fluid filaments, similar to those observed in molecular cloud complexes. We perturb the nonlinear, inhomogeneous, cylindrical equilibrium of a self-gravitating fluid and solve the linearized Euler equations, including the effects of an axial magnetic field. We present numerical solutions and dispersion relations for various barotropic equations of state. In addition to the traditional isothermal equation of state, we also consider the empirical relation p ~ log (rho ), suggested by velocity dispersions in molecular cloud observations. Studies of Alfven waves in molecular clouds suggest p ~ rho (1/2) , which is also considered. Finally, we discuss observable characteristics of periodic structure in molecular cloud filaments modelled in this fashion and make comparisons with observations.

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