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J/A+A/328/261       Spectroscopy of Alpha Cen         (Neuforge-Verheecke+ 1997)
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Spectroscopic analysis of the Alpha Centauri System
       Neuforge-Verheecke C., Magain P.
      <Astron. Astrophys. 328, 261 (1997)>
      =1997A&A...328..261N      (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, double and multiple ; Abundances ; Spectroscopy
Keywords: stars: {alpha} Centauri -
          stars: binaries: visual; abundances; fundamental parameters -

Description:
    This table presents the results of a spectroscopic analysis
    (differentially to the Sun) of the two components of the
    binary system Alpha Centauri. This analysis has been carried out on
    the basis of extensive high resolution and high signal-to-noise
    spectra taken at the European Southern Observatory (La Silla, Chile).

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    14 40 00.8   -60 50 42   alpha Cen A = HR 5459 = HD 128620
    14 40 00.7   -60 50 38   alpha Cen B = HR 5460 = HD 128621
    ----------------------------------------------------------

File Summary:
--------------------------------------------------------------------------------
  FileName     Lrecl  Records  Explanations
--------------------------------------------------------------------------------
ReadMe            80        .  This file
table4.dat       107      161  Spectroscopic data and abundances in Alpha Cen A,
                                Alpha Cen B and the Sun.
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Byte-by-byte Description of file: table4.dat
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   Bytes Format Units   Label     Explanations
--------------------------------------------------------------------------------
   1-  4  A4    ---     Elm       Element and ionisation stage
   6- 10  F5.3  ---     AbundSun  Solar abundance (1) (2)
  13- 20  F8.3  0.1nm   lambda    Wavelength of the line
  23- 28  F6.3  eV      EP        Excitation potential of the lower level
  32- 37  F6.3  ---     log(gf)   Solar oscillator strength in log10
  41- 44  F4.1  0.1pm   EWsc      Solar equivalent width at the disk center
  48- 51  F4.1  0.1pm   EWs       ? Solar equivalent width in integrated light
  55- 59  F5.3  ---     AbundSun2 ? Solar abundance from EW in integrated light
  62- 66  F5.1  0.1pm   EWa       ? Equivalent width in Alpha Cen A
  70- 74  F5.3  ---     AbundA    ? Abundance in Alpha Cen A (1)
  77- 81  F5.1  0.1pm   EWb       ? Equivalent width in Alpha Cen B
  85- 89  F5.3  ---     AbundB    ? Abundance in Alpha Cen B (1)
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Note (1): The abundance of an element is given on the usual logarithmic
           scale relative to hydrogen: A(el)=(log(Nel/NH) + 12)
           Nel and NH being respectively the number densities of the element
            and of hydrogen.
Note (2): For the CN molecule, the solar abundance indicated is that of N.
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Acknowledgements: Corinne Neuforge <Corinne.Neuforge@ulg.ac.be>
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(End)                                         Patricia Bauer [CDS]   25-Aug-1997