Hostname: page-component-f554764f5-fnl2l Total loading time: 0 Render date: 2025-04-14T04:00:13.096Z Has data issue: false hasContentIssue false
  • English
  • Français

NLTE analysis of SDO stars

Published online by Cambridge University Press:  04 August 2017

U. Heber ,
K. Hunger ,
R.P. Kudritzki  and
K. P. Simon
U. Heber
Affiliation:
Institut für Theor. Physik und Sternwarte, Kiel
K. Hunger
Affiliation:
Institut für Theor. Physik und Sternwarte, Kiel
R.P. Kudritzki
Affiliation:
Institut für Astronomie und Astrophysik, München
K. P. Simon
Affiliation:
Institut für Astronomie und Astrophysik, München

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Among the faint blue halo stars the sdO's form a group whose evolutionary status is still not fully understood. Phenomenologically they appear to be related to the horizontal branch. The knowledge of stellar parameters and abundances may give a clue for understanding their evolutionary status. As the sdO's are hot (Teff ≥ 35000K), the assumption of LTE leads to substantial errors. Hence detailed NLTE analyses are inevitable.

Type
I. EVOLUTION OF LOW AND INTERMEDIATE MASS STARS OBSERVATIONS AND MODELS
Information
Symposium - International Astronomical Union , Volume 105: Observational Tests of the Stellar Evolution Theory , 1984 , pp. 215 - 218
Copyright
Copyright © Reidel 1984 

References

Gross, P.G.: 1973, Monthly Notices Roy. Astron. Soc. 164, 65 CrossRefGoogle Scholar
Heber, U., Hunger, K., Jonas, G., Kudritzki, R.P.: 1983a, Astron. Astrophys., in press Google Scholar
Heber, U., Hamann, W.-R., Hunger, K., Kudritzki, R.P., Simon, K.P. Mendez, R.H.: 1983b, Astron. Astrophys., submitted Google Scholar
Kudritzki, R.P., Simon, K.P.: 1978, Astron. Astrophys. 70, 653 Google Scholar
Sweigart, A.V., Mengel, J.G., Demarque, P.: 1974, Astron. Astrophys. 30, 13 Google Scholar