A Principal Component Analysis comparison between observations and simulations of the ISM.

Details A Principal Component Analysis comparison between observations and simulations of the ISM. A Principal Component Analysis comparison between observations and simulations of the ISM.

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998larm.confe..82p&link_type=abstract

"IX Latin American Regional IAU Meeting, "Focal Points in Latin American Astronomy", held in Tonantzintla, Mexico, Nov 9-13, 199

Astronomy and Astrophysics

Astronomy

Scientific paper

With the purpose of determining the main physical ingredients of an accurate model of the ISM, we apply the technique of Principal Component Analysis (PCA) to three-dimensional numerical simulations of the turbulent ISM including the magnetic field, self-gravity, parameterized heating and cooling, and modeled star formation, as well as to barotropic (P \propto \rho^\gamma, with \gamma a free parameter) purely hydrodynamic turbulent flows. We compare with similar analyses of observational data existing in the literature. We also discuss the interpretation of the PCA results on simple, idealized objects with specified motions, emphasizing the ambiguities and capabilities of the method.

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