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

Details FUSE Observations of the Post-AGB Star ZNG 1 in the Globular Cluster M5 FUSE Observations of the Post-AGB Star ZNG 1 in the Globular Cluster M5

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...20111306d&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #113.06; Bulletin of the American Astronomical Society, Vol. 34, p.1284

Astronomy and Astrophysics

Astronomy

1

Scientific paper

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.

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