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

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

oai:dspace.library.uu.nl:1874/32620

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

Authors: R. Ignace
J.P. Cassinelli
G. Tracy
H.J.G.L.M. Lamers
E.B. Churchwell
Publication date: 1 January 2008
Publisher

Abstract

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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