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Astron. Astrophys. 315, L193-L196 (1996)

ISO-SWS spectrophotometry of galactic Wolf-Rayet stars: preliminary results*

K.A. van der Hucht1, P.W. Morris2,1, P.M. Williams3, D.Y.A. Setia Gunawan1, D.A. Beintema2,4, D.R. Boxhoorn4, Th. de Graauw4, A. Heras2, D.J.M. Kester4, F. Lahuis2, K.J. Leech2, P.R. Roelfsema2,4, A. Salama2, E.A. Valentijn4, and B. Vandenbussche2,5

1 Space Research Organization Netherlands, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands
2 ESA-ISO Observatory, Villafranca del Castillo, Apdo 50727, E-28080 Madrid, Spain
3 Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
4 Space Research Organization Netherlands, P.O. Box 800, 9700 AV Groningen, The Netherlands
5 Sterrenkundig Instituut, K.U. Leuven, Celestijnenlaan 200B, B-3001 Heverlee, Belgium

Received 15 July 1996 / Accepted 5 September 1996

Abstract. ISO-SWS spectra of seven late-type galactic Wolf-Rayet stars are discussed. A high resolution spectrum (2.3 - 29.6 img1.gifm, img2.gif 820 - 1700) of the WC8 star WR11 (img3.gif Vel) is shown and its Ne abundance is discussed. Medium resolution spectra ( img2.gif 250 - 600) of the WC8-9 stars WR48a, WR98a, WR104, WR112 and WR118 show the broad circumstellar heated amorphous carbon dust emission feature and interstellar silicate and hydrocarbon absorption features.

Key words: stars: Wolf-Rayet - interstellar medium: extinction - infrared: spectroscopy

* Based on observations made with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries: France, Germany, the Netherlands and the United Kingdom) and with the participation of ISAS and NASA.

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