Bibcode
Villamariz, M. R.; Herrero, A.
Bibliographical reference
Astrophysics and Space Science, v. 263, Issue 1/4, p. 247-250 (1998).
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6
1998
Journal
Citations
0
Refereed citations
0
Description
We present quantitative analyses of 7 galactic O stars of spectral types
from O3 to O6. By means of classical hydrostatic and planeparallel
models we find the so-called He and Mass Discrepancies for a number of
stars of our sample. We also prove the need of line-blocking for the
correct reproduction of these spectra. For stars with effective
temperature around 50 000 K and above, there is no possibility of
reproducing their spectra with these kind of models. Further analyses
with unified models, including sphericity and mass loss, allow us to
reproduce even the earliest spectra. They also show that the Mass
Discrepancy is not only due to the neglect of sphericity and mass loss
in the planeparallel analysis, and give us the mass loss rate of these
stars. We find that HD15 570, with a present mass of 100
M&sun;, can be the most massive star known in the solar
neighbourhood.