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V/14        uvby Estimated Astrophysical Parameters (Philip+ 1980)
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uvby Estimated Astrophysical Parameters
    Philip A.G.D., Egret D.
    <Astron. Astrophys. Suppl., 40, 199 (1980)>
    =1980A&AS...40..199P
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ADC_Keywords: Photometry, uvby, beta

Description:
  Observed values of the Stromgren colors were collected from the
  literature. A computer program calculated the reddening for each star.
  This value was used to compute the unreddened value of (b-v), c, and m.
  These were then used to compute [c(1)], [m(1)], and [u-b] for the star.
  Except for the H beta index, the observed quantities are not included.
         
Introduction:
  The stars were divided into groups by spectral types by means of the
  bracket quantities. Stars which deviated too greatly from the standard
  relations could not be dereddened. These include peculiar stars and high
  luminosity stars and are listed in reject.dat. Various discussions by
  Crawford were followed to deredden the other stars. The zero point of
  the [Fe/H] relation was changed from 0.4 to 0.2 on the basis of the
  study by Gustafsson and Nissen (1972) and some corrections were made to
  the effective temperature scale in order to fit the new model by Kurucz
  (1979). Otherwise, the derivations followed the methods of Philip,
  Miller, and Relyea (1976).
         
File Summary:
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 FileName       Lrecl  Records   Explanations
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ReadMe             80        .   This file
data.dat          129     9054   Estimated astrophysical parameter data
nmsys.dat          80      245   Mermilliod numbering system
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Byte-by-byte Description of file: data.dat
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   Bytes  Format  Units   Label    Explanations
--------------------------------------------------------------------------------
   1- 11   A11    ---     ID      *Star Code
  13- 18   F6.3   mag     (b-y)0  *Dereddened Stromgren color: b-y
  20- 25   F6.3   mag     (c1)0    Dereddened Stromgren c
  28- 32   F5.3   mag     (m1)0    Dereddened Stromgren m
  35- 39   F5.3   mag     Hbeta    ?Dereddened Stromgren Hbeta
  41- 46   F6.3   mag     c1      *Derived [c(1)]
  48- 53   F6.3   mag     m1       Derived [m(1)]
  55- 60   F6.3   mag     u-b      Derived [u-b]
  62- 67   F6.3   mag     E(b-y)   Derived redenning in (b-y)
  69- 74   F6.3   mag     dm1     *Deviation from the mean [m(1)]
  76- 81   F6.3   mag     dc1     *? Deviation from the mean [c(1)]
  83- 85   A3     ---     Sp      *Main Spectral Group for the star
  87- 95   A9     ---     MK      *MK Classification of the star
  97-101   F5.2   mag     V        ? Derived Absolute V Magnitude
 104-107   F4.2   ---     theta   *? Derived Effective Temperature
 109-112   F4.2   cm.s-2  log_g    ? Gravity, derived log(g).
 114-117   F4.2   ---     Fe/H    *? Iron/Hydrogen Abundance, derived [Fe/H]
 119-129   A11    ---     ref      Bibliographical References to original data
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Note on ID:
  see nmsys.dat

Note on (b-y)0:
  Stromgren Parameters corrected from interstellar reddening

Note on c1:
  Stromgren Parameters independent of interstellar extinction

Note on dm1:
  difference between the dereddened parameters of the star and the ZAMS 
        parameters:
  dm    = mz - m0

Note on dc1:
  difference between the dereddened parameters of the star and the ZAMS 
        parameters:
  dc    = c0 - cz

Note on Sp:
  Spectral Group: B, A*, A, F, AM, AP

Note on MK:
  MK classification of the star (compiled by Jaschek M., 1979)

Note on theta:
  theta = 5040 / T

Note on Fe/H:
  a logarithmic difference

Byte-by-byte Description of file: nmsys.dat
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   Bytes  Format  Units   Label    Explanations
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   1- 80   A80    ---     nmsys   *Mermilliod coded number system
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Note on nmsys:
  Mermilliod J.C. 1973, Rapport interne du CDS 5.

References:
  Gustafsson B., and Nissen, P. E. 1972 Astron. & Astrophys. 19, 261.
  Jaschek M. 1978, Inf. Bull. Strasbourg Stellar Data Center 15, 121.
  Jaschek M., Jaschek C., Chmielewski I., 1979, Ric. Astron., 9, 179.
  Kurucz R.L., 1979  Astrophys. J. Suppl. 40, 1.
  Mermilliod J.C. 1973, Rapport interne du CDS 5.
  Nissen P.E. , 1972, Astron. & Astrophys. 19, 261.
  Philip A.G.D., Miller T.M., and Relyea L.J., 1976, Dudley Obs. Rep. No. 12, 1.
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(End)                                  Julie Anne Watko [SSDOO/ADC]  15-AUG-1996