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Mid-Infrared Spectra of Be Stars

  • S.A. Rinehart (a1) and J.R. Houck (a2)

Abstract

We present medium-resolution (R ~ 600) mid-infrared (8-13.3μm) spectra of γ Cas and a coadded spectrum of nine Be stars. A large number of lines have been observed and identified in these spectra, including 39 hydrogen recombination lines in the spectrum of γ Cas. In the majority of our spectra, all of the observed lines are attributable to hydrogen recombination. Two additional sources, β Lyr and MWC 349, show [Ne II] emission and β Lyr also displays [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.

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References

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Cohen, M., Walker, R.G., Barlow, M.J., Deacon, J.R. 1992. AJ 104, 1650.
Hummer, D.G. & Storey, P.J. 1987. MNRAS 224, 801.
Rinehart, S.A., Houck, J.R. & Smith, J.D. 1999, AJ, in press.
Smith, J.D., Rinehart, S.A., Houck, J.R., van Cleve, J.E., Wilson, J.C., Colonno, M., Schoenwald, J., Pirger, B., Blacken, C. 1998. Proc. SPIE 3354, 798.
Van Cleve, J., Gull, G.E., Rinehart, S.A., Smith, J.D., Wilson, J.C., Houck, J.R., Brown, R., Blalock, W. 1998, PASP 110, 1479.
Waters, L.B.F.M., et al. these proceedings.

Mid-Infrared Spectra of Be Stars

  • S.A. Rinehart (a1) and J.R. Houck (a2)

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