Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...262..663h&link_type=abstract
Astrophysical Journal, Part 1, vol. 262, Nov. 15, 1982, p. 663-674.
Astronomy and Astrophysics
Astrophysics
33
B Stars, Helium, Nonequilibrium Conditions, Stellar Spectra, Thermodynamic Equilibrium, Light Curve, Line Spectra, Spectral Line Width, Stellar Models
Scientific paper
Profiles of He gamma-gamma 4026, 4387, 4471, 4713, 5876, and 6678 have been obtained in 17 stars of spectral type B0-B5. Parameters of the nonlocal thermodynamic equilibrium models appropriate to each star are determined from the Stromgren index and fits to H-alpha line profiles. These parameters yield generally good fits to the observed He I line profiles, with the best fits being found for the blue He I lines where departures from local thermodynamic equilibrium are relatively small. For the two red lines it is found that, in the early B stars and in stars with log g less than 3.5, both lines are systematically stronger than predicted by the nonlocal thermodynamic equilibrium models.
Gethyn Timothy J.
Heasley James N. Jr.
Wolff Sidney C.
No associations
LandOfFree
He I lines in B stars - Comparison of non-local thermodynamic equilibrium models with observations 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 He I lines in B stars - Comparison of non-local thermodynamic equilibrium models with observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and He I lines in B stars - Comparison of non-local thermodynamic equilibrium models with observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1756332