Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....85..174k&link_type=abstract
Astronomy and Astrophysics, vol. 85, no. 1-2, May 1980, p. 174-183.
Astronomy and Astrophysics
Astrophysics
74
Line Spectra, O Stars, Spectrum Analysis, Stellar Spectra, Supermassive Stars, Abundance, Helium, High Resolution, Physical Properties, Stellar Atmospheres, Stellar Gravitation, Stellar Luminosity, Stellar Mass, Stellar Temperature, Thermodynamic Equilibrium
Scientific paper
The detection of a weak He I 4471 A line in high-resolution coude-spectrograms of the O3 star HD 93250 has made it possible to determine effective temperature, gravity, and helium abundance. This is achieved by detailed non-LTE model atmosphere and line formation calculations followed by a fit of the hydrogen and helium line spectrum, which yields: T(eff) equals 52500 plus or minus 2500 K, log g equals 3.95 plus or minus 0.15 cgs, and a normal helium abundance. Mass, luminosity, and radius are then calculated. Comparison of these data with evolutionary tracks, including mass loss, leads to a conclusion that HD 93250 is a main-sequence O star with more than 100 solar masses.
No associations
LandOfFree
Non-LTE analysis of the O 3-star HD 93250 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Non-LTE analysis of the O 3-star HD 93250, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-LTE analysis of the O 3-star HD 93250 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1358580