Abstract
The theoretically viable prospect that density waves and the associated galactic shock fronts are present in disk-shaped galaxies has received support in recent years from a variety of observational studies. Large-scale shocks in the interstellar gas may play an important role in determining the kinematics and the relative distribution of various galactic tracers. This is particularly apparent in some external spirals, because of the advantageous perspective, and for the tracers HI and CO in our own Galaxy. Simulation of CO observations according to the precepts of the density-wave theory shows that these precepts are supported by several observational results.
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Roberts, W.W., Burton, W.B. (1977). The Large-Scale Distribution of Interstellar Matter in the Context of the Density-Wave Theory. In: Van Woerden, H. (eds) Topics in Interstellar Matter. Astrophysics and Space Science Library, vol 70. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1254-6_21
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DOI: https://doi.org/10.1007/978-94-010-1254-6_21
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