Abstract
In a poorly understood physical system such as a spiral galaxy, it is not generally obvious what the most important observational parameters are. As observational techniques improve, and the number of different types of measurements increase, the apparent complexity of the problem also grows. However, it is possible that the n different observational properties are all controlled by only m fundamental parameters, with m ≪ n. The parameter space would then be m-dimensional, so that only the m fundamental properties need to be known to completely describe the system.
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© 1989 Springer-Verlag New York, Inc.
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Whitmore, B.C., Forbes, D.A. (1989). An Objective Classification System for Spiral Galaxies and Its Relationship to the [N II]/[S II] Ratio. In: Corwin, H.G., Bottinelli, L. (eds) The World of Galaxies. Springer, New York, NY. https://doi.org/10.1007/978-1-4613-9356-6_11
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DOI: https://doi.org/10.1007/978-1-4613-9356-6_11
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