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Table 9

Atmospheric parameters obtained from the flux calibrated spectra of BD+29°3070, BD+34°1543 and Feige 87.

Parameter BD+29°3070 BD+34°1543 Feige 87

E(B − V) (mag) 0.013 0.002 0.000
Flux ratioa 1.353 1.337 2.252
MS component
Teff (K) 6026 ± 300 5715 ± 300 5675 ± 250
log g (dex) 4.26 ± 0.30 4.11 ± 0.30 4.23 ± 0.35
[Fe/H] 0.08 ± 0.25 –0.37± 0.25 –0.39 ± 0.25
sdB component
Teff (K) 25380 ± 990 36640 ± 810 27270 ± 500
log g (dex) 5.54 ± 0.18 6.13 ± 0.16 5.47 ± 0.15
Heb –2.63 –1.49 ± 0.13 –2.56
Cb –3.27> –4.64> –3.77>
Nb –2.79> –3.28> –3.69>
Ob –1.93> –3.72> –2.89>

Notes.

(a)

Flux ratio FsdB/FMS in wavelength range 6720−6800 Å.

(b)

Abundance given as log (nX/nH).

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