A Spitzer IRS Survey of Wolf-Rayet Stars at 10--20 Microns

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

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.

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