AAS 201st Meeting, January, 2003
Session 89. Planetary Nebulae and Dusty Clouds
Poster, Wednesday, January 8, 2003, 9:20am-6:30pm, Exhibit Hall AB

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[89.15] O VI Emission from NGC7009, the Saturn Nebula.

R.C. Iping (Catholic University of America & NASA's GSFC), G. Sonneborn (NASA's GSFC), Y.-H. Chu (University of Illinois)

We present far-ultraviolet 905-1187 Åspectroscopy of the Saturn Nebula, NGC 7009, obtained with the FUSE satellite. To isolate the nebula from the central star, the narrow slit, 1.25 x 20 arcsec, of the FUSE instrument was used and positioned at two different locations in the nebula. FUSE detected nebular O VI 1032, 1038 Åemission lines at both locations in the nebula, with a stronger emission at the location closest to the central star.

O VI is the dominant cooling agent for gas at T~3 x 105 K.

Emission lines of He II, C III, N II, S III, S IV, and Si IV are also present.

A FUSE observation of the central star reveals a very strong O VI 1032-1038 ÅP-Cygni line profile with a terminal velocity of ~3000 km/sec.

Financial support has been provided by NASA grant NAG5-12347 to CUA.

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Bulletin of the American Astronomical Society, 34, #4
© 2002. The American Astronomical Soceity.