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A Spitzer IRS survey of Wolf-Rayet stars at 10–20 microns

By R. Ignace, J.P. Cassinelli, G. Tracy, H.J.G.L.M. Lamers and E.B. Churchwell


We report on a mid-infrared survey of Wolf-Rayet stars using the Spitzer IRS/SH instrument for types WN4-WN7 and WC4-WC7. Strong emission line spectra are seen, including forbidden emission lines. Surprisingly, the WN stars appear to show broad emission “bumps” that may be consistent with silicate dust grains

Year: 2008
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