Visual representation of normal-mode analysis of striations in Musca: The first part of the movie
gives an overview of the problem of viewing star-forming clouds in 2D projection. The second
part of the video shows the striations in Musca, and the process through which the normal mode
spatial frequencies are recovered. The third part of the movie demonstrates how the apparently
complex profiles of the intensity cuts through striations are reproduced by progressively
summing the theoretically predicted normal modes. At this part of the video (1:30-1:52) the
spatial frequencies are scaled to the frequency range of human hearing and are represented by the
musical crescendo. Finally, the results of a 3D MHD simulation of a cloud with dimensions
comparable to those obtained for Musca through normal-mode analysis are presented. This material relates to a paper that appeared in the 11 May 2018 issue of Science, published by AAAS. The paper, by A. Tritsis at University of Crete in Crete, Greece, and colleagues was titled, "Magnetic seismology of interstellar gas clouds: Unveiling a hidden dimension."
Aris Tritsis, Nick Gikopoulos, Valerio Calisse, Kostas Tassis
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