The composite spectrum of the binary star HD 161701



plot of the FEROS spectrum--observed Sept.-9-2006_R=48000
The 3800-5900 A range is plotted at 25 A intervals

plot of the HARPS spectrum--observed Aug. 2012_R=110000
A-component wavelengths

plot of the HARPS spectrum--observed Aug. 2012 R=110000
B-component wavelengths

plot of the CRIRES spectrum




  Atmospheric parameters:

   FROM the Stromgren photometery and ATLAS9 color grids:
   Component A: Teff=12652K, log g=3.98
   The effect of the B component was not considered

   FROM observed and computed composite BALMER PROFILES:
   ATLAS9 parameters for a radii ratio (R(B)/R(A))^2=0.4
   Component A : Teff=12650K, logg=3.8
   Component B : Teff=9750K, logg=3.9 

  The radii ratio was derived from the relation:

  [R(B)/R(A)]^2=M(B)/M(A)*(g(A)/g(B))

  where M(A)/M(B)=1.7 (Gonzalez et al. 2014) and logg(A)-logg(B) was assumed equal to -0.1

  From the comparison of observed and computed spectra:
  For the A component: vsini=17 km/sec
  For the B component: vsini=6  km/sec

  Final  parameters:
  For the A component, ATLAS12 parameters: Teff=12400K, logg=3.8.
  They give a T-tauross stratification similar to that from the
  [12650, 3.8] ATLAS9 model. The ATLAS12 abundances are those 
  derived from the [12650,3.8] ATLAS9 model.
  For the B component, ATLAS9 parameters: Teff=9750K, logg=3.9 

  The parameters reproduce the composite hydrogen profiles Hbeta, Hgamma, 
  Hdelta and meet the requirement of FeI-FeII ionization equilibrium.
  Only profiles were used, no equivalent widths were measured.

-----------------------------------------------------------

  ABUNDANCES: The synthetic spectrum was computed with the abundances
  of He I, C II, O I, Na I, Mg II, Al I, Si II, P II... for the A component
  and with the abundances of ... for the B component.
       
                  A star     B star     sun

         He I   -2.45                -1.11 
         C II   -3.8       -4.6      -3.52
         O I    -3.34      -4.5      -3.21 
         Na I   -5.67 
         Mg II  -5.06      -4.90     -4.46
         Al I   -6.60      -7.00     -5.57
         Si II  -4.18      -6.00     -4.49
         Si III -4.13     -6.00     -4.49
         P II   -4.91                -6.59
         S II   -5.6:                -4.71
         Ca II  -5.53      -5.70     -5.68
         Sc II <-9.90    <-10.90     -8.87     
         Ti II  -6.10      -6.75     -7.02
         Cr II  -6.26      -5.60     -6.37
         Mn II  -5.10      -5.70     -6.65 
         Fe I   -3.60      -4.20     -4.54
              Co            -7.12     -7.12
              Ni -6.80      -5.79     -5.79
              Zn            -7.44     -7.44 
              Ga -5.85      -9.16     -9.16 
              Sr -7.90      -8.10     -9.07
               Y -7.70      -8.24     -9.80
              Zr -8.44      -9.50     -9.44
              Xe -5.44      -9.87     -9.87
              Ba -9.91      -9.40     -9.91
              La            -8.80    -10.87
              Ce            -7.98    -10.46 
              Pr            -7.82    -11.33
              Nd            -6.91    -10.54
              Sm            -7.92    -11.03
              Eu            -8.82    -11.53
              Gd            -8.60    -10.92
              Tb            -8.46    -11.69    
              Dy            -7.47    -10.90
              Ho            -8.43    -11.78 
              Er            -7.79    -11.11
              Hg -6.70               -10.91