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The atmosphere of subluminous B stars

Published online by Cambridge University Press:  04 August 2017

U. Heber ,
K. Hunger ,
G. Jonas  and
R.P. Kudritzki
U. Heber
Affiliation:
Institut f. theoretische Physik und Sternwarte, Kiel
K. Hunger
Affiliation:
Institut f. theoretische Physik und Sternwarte, Kiel
G. Jonas
Affiliation:
Institut f. theoretische Physik und Sternwarte, Kiel
R.P. Kudritzki
Affiliation:
Institut f. Astronomie und Astrophysik, München

Extract

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8 sdB stars have been analyzed for effective temperatures, gravity and helium content by means of LTE and NLTE model atmospheres (Heber et al., 1983). The analyses are based on the following observations:

  1. 1.) B&C IDS spectrograms obtained with ESO's 3.6m and 1.5m telescopes (4250–4800å at 29 å/mm, or, 4000–5000å at 59 å/mm).

  2. 2.) IUE spectra in low resolution (6å) through the large aperture.

  3. 3.) Johnson and Strömgren colours, which are taken from the literature.

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. 223 - 224
Copyright
Copyright © Reidel 1984 

References

Caloi, V.: 1972, Astron. Astrophys. 62, 411 Google Scholar
Gross, P.G.: 1973, Monthly Notices Roy. Astron. Soc. 164, 65 CrossRefGoogle Scholar
Heber, U., Hunger, K., Jonas, G., Kudritzki, R.P.: 1983, Astron. Astrophys., in press Google Scholar
Paczynski, B.: 1971, Acta Astron. 21, 1 Google Scholar