¹ Queen Mary & Westfield College, Mile End Road, London E1 4NS, United Kingdom
² Cornell University, Space Sciences Building, Ithaca, NY 14853

We present the first medium-resolution (R600) mid-infrared (8-13.3 m) spectra of 11 Be stars. A large number of lines are observed and identified in these spectra, including, as an example, 39 hydrogen recombination lines in the spectrum of  Cas. In the majority of our spectra, all of the observed lines are attributable to hydrogen recombination. Two of the sources,  Lyr and MWC 349 also show emission from other species. Both of these objects show evidence of [Ne II] emission, and  Lyr also shows evidence of He I emission. We tabulate the effective line strength and line widths for the observed lines, and briefly discuss the physical implications of the observed line series. We also use a simple model of free-free emission to characterize the disks around these sources.

1999, AJ, 118, 2974