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

Type Conference Paper
Names R. Ignace, J. P. Cassinelli, G. Tracy, H. J. G. L. M. Lamers, E. B. Churchwell, Alex de Koter, Linda J. Smith, Laurens B. F. M Waters
Proceedings Title ASP Conference Series
Conference Name Mass Loss from Stars and the Evolution of Stellar Clusters
Place San Francisco, CA
Publisher Astronomical Society of the Pacific
Volume 388
Pages 177
Series ASP Conference Series
Date June 1, 2008
URL http://adsabs.harvard.edu/abs/2008ASPC..388..177I
Library Catalog NASA ADS
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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