Publications of the MPIfR
Optical & Infrared
Interferometry Group
Y.Y. Balega, V.V. Leushin, G. Weigelt
Atmospheric Elemental Abundances for the
Components of the Multiple System ADS 11061. 41 Draconis
Astronomy Reports, Vol. 49, Issue 3, p.217-225
(2005)
Abstract
We obtained speckle interferometric and spectroscopic
observations of the system 41 Dra during its periastron
passage in 2001. The components' lines are resolved in the
spectral interval 3700–9200 Å. The observed wavelength
dependence of the brightness difference between the components is used
to estimate the B–V indices separately for each of the
components: B–V = 0.511 for component a and B–V = 0.502
for component b. We derived improved effective temperatures
of the components from their B–V values and
hydrogen-line profiles. The observations can be described
with the parameters for the components T
= 6370
K, log ga = 4.05 and
T
= 6410
K, log gb = 4.20. The iron, carbon,
nitrogen, and oxygen abundances in the atmospheres of the
components are log N(Fe)a = 7.55,
log N(Fe)b = 7.60, log N(C)a = 8.52,
log N(C)b = 8.58, log N(N)a = 8.05,
log N(N)b = 7.99, log N(O)a = 8.73,
log N(O)b = 8.76.©2005 Pleiades
Publishing, Inc.
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