Astronomy and Astrophysics – Astrophysics
Scientific paper
1999-09-14
Astronomy and Astrophysics
Astrophysics
Invited commentary to be published in the Centennial Issue of The Astrophysical Journal, 11 pages, no figures
Scientific paper
The series of papers by Chandrasekhar and Munch in the 1950s were concerned with the use of statistical models to infer the properties of interstellar clouds based on the observed spatial brightness fluctuations of the Milky Way. The present paper summarizes the subsequent influence of this work, concentrating on the departure from their earlier discrete cloud model to a continuous stochastic model in Paper V of the series. The contrast between the two models anticipated and parallels current tensions in the interpretation of interstellar structure, as well as intergalactic Lyman alpha clouds. The case of interstellar structure is discussed in some detail. Implications concerning the reification of models and the ability of scientific abstraction to model complex phenomena are also briefly discussed.
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