P V and the Mass Loss Discrepancy in O Stars

Details P V and the Mass Loss Discrepancy in O Stars P V and the Mass Loss Discrepancy in O Stars

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aspc..348..118m&link_type=abstract

Astrophysics in the Far Ultraviolet: Five Years of Discovery with FUSE ASP Conference Series, Vol. 348, Proceedings of the Confe

Astronomy and Astrophysics

Astrophysics

Scientific paper

Building upon a previous analysis of P V wind lines in LMC O stars, we analyze the P V wind lines in a sample of Galactic O stars which have empirical mass loss rates determined from either their radio fluxes or Hα profiles. Since the wind analysis provides a measure of dot{M} q where q is the ionization fraction of the ion, we determine q(P V) observationally. In spite of model predictions that q ˜ 1 for mid-O stars, we find q(P V) ≤ 0.15 throughout the O stars. We discuss the origin of this discrepancy.

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