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Astron. Astrophys. 339, 19-33 (1998) AcknowledgementsWe have benefited from the help of F. Viallefond for the numerical calculations and the data processing, and from discussions with D. Beck, G. Helou, S. Madden, S. Shore. We thank F.X. Désert and J. Le Bourlot for letting us use their codes, and M.G. Wolfire for providing unpublished results. ![]() ![]() ![]() ![]() © European Southern Observatory (ESO) 1998 Online publication: September 30, 1998 ![]() |