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Article
The KOSMA large-scale CO survey of clouds in the Galactic Molecular Ring
We present the status of the KOSMA large-scale observations of clouds in the Galactic Molecular Ring (GMR) in CO J=3-2, 2-1 and 13CO 2-1 following up on the BU-FCRAO 13CO 1-0 survey. The GMR is one of the promine...
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Article
Convective stability in magnetic stars
Dynamical stability of a static axisymmetrical magnetic star with respect to high-order modes of oscillation is investigated by means of the energy method, neglecting the Eulerian perturbation of gravity. The ...
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Article
Spiral structure and hydrodynamic gravitational resonance
A persistent and large scale galactic spiral structure might be the result of resonant excitation of density waves, forced in the low viscosity interstellar gas, by the gravitational field of an asymmetric ste...