Mass Loss from the Central Star of NGC 7009

Details Mass Loss from the Central Star of NGC 7009 Mass Loss from the Central Star of NGC 7009

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..388..223s&link_type=abstract

Mass Loss from Stars and the Evolution of Stellar Clusters ASP Conference Series, Vol. 388, proceedings of the conference held 2

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The central star of NGC 7009 (HD 200516) was observed with the FUSE satellite, covering 905-1187 Å at a spectral resolution of 15 km/s. The observed stellar wind lines are O VI 1032, S VI 933-44 and Ne VII 973 (FUSE), plus N V 1240 and O V 1371 (IUE). C IV 1550 and P V 1118-28 are absent, indicating that the wind is very highly ionized. The mass loss rate is estimated as ˜10-7 Msunyr and the terminal velocity 2450 km/s. Preliminary analysis of the stellar spectrum identifies several strong lines of F VI, Fe VI, Fe VII and Ni IV.

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