AAS 201st Meeting, January, 2003
Session 113. Massive Star Winds and Atmospheres
Poster, Thursday, January 9, 2003, 9:20am-4:00pm, Exhibit Hall AB

[Previous] | [Session 113] | [Next]

[113.06] FUSE Observations of the Post-AGB Star ZNG 1 in the Globular Cluster M5

W. V. Dixon (JHU), T. M. Brown (STScI), W. B. Landsman (SSAI)

We have observed the hot post-AGB star ZNG 1 in the globular cluster M5 (NGC 5904) with the Far Ultraviolet Spectroscopic Explorer (FUSE). From the resulting spectrum, we derive an effective temperature Teff ~ 45,000K, a rotational velocity vrot ~ 100km/s, carbon and nitrogen abundances approximately ten times solar, a wind with terminal velocity near 1000 km/s, and evidence for an expanding shell of material around the star. The carbon and nitrogen enhancements suggest dredge-up of nuclear-processed material on the AGB. The high rotational velocity may reflect a previous merger with a binary companion.

This research is supported by NASA grant NAG5-10405.

[Previous] | [Session 113] | [Next]

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