Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007an....328...63a&link_type=abstract
Astronomische Nachrichten, Vol.328, Issue 1, p.63-67
Astronomy and Astrophysics
Astrophysics
5
Stars: Spectrophotometry, Stars: Atmospheric Modeling, Stars: Individual: Cou1289, Cou1291
Scientific paper
The spectral energy distributions between λ 3700 Å, and λ 8100 Å, of the binary systems COU1289 and COU1291 have been measured with the Carl-Zeiss-Jena 1 m telescope of the Special Astrophysical Observatory. Their B,V,R magnitudes and B-V colour indices were computed and compared with earlier investigations. Model atmospheres of both systems were constructed using a grid of Kurucz blanketed models, their spectral energy distributions in the continuous spectrum were computed and compared with the observational ones. The model atmosphere parameters for the components of COU1289 were derived as: T_eff{a} =7100 K, T_eff{b}=6300 K, log g_a=4.22, log g_b=4.22, R_a=1.50 R&sun;, R_b=1.40 R&sun;, and for the components of COU1291 as: T_eff{a}=6400 K, T_eff{b} =6100 K, log g_a=4.20, log g_b=4.35, R_a=1.47 R&sun;, R_b=1.12 R&sun;. The spectral types of both components of the system COU1289 were concluded as F1 and F7, and of the system COU1291 as F6 and F9. Finally the formation and evolution of the systems were discussed.
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