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J/A+A/511/A22       EW Ori differential uvby light curves    (Clausen+, 2010)
Absolute dimensions of solar-type eclipsing binaries.
III. EW Orionis. Stellar evolutionary models tested by a G0 V system.
    Clausen J.V., Bruntt H., Olsen E.H., Helt B.E., Claret A.
   <Astron. Astrophys. 511, A22 (2010)>
   =2010A&A...511A..22C
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby

Keywords: stars: evolution - stars: fundamental parameters - stars: abundances -
          binaries: eclipsing - techniques: photometric -
          techniques: spectroscopic

Abstract:
    Recent studies of inactive and active solar-type binaries suggest that
    chromospheric activity, and its effect on envelope convection, is
    likely to cause significant radius and temperature discrepancies.
    Accurate mass, radius, and abundance determinations from additional
    solar-type binaries exhibiting various levels of activity are needed
    for a better insight into the structure and evolution of these stars.
    We aim to determine absolute dimensions and abundances for the G0 V
    detached eclipsing binary EW Ori, and to perform a detailed
    comparison with results from recent stellar evolutionary models.

Description:
    uvby light curves for EW Ori were obtained with the Stroemgren
    Automatic Telescope.
Objects:
    --------------------------------------------
       RA   (2000)   DE      Designation(s)
    --------------------------------------------
    05 20 09.1   +02 02 40   EW Ori = HD 287727
    --------------------------------------------

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table11.dat       71      624   uvby light curves for EW Ori


See also:
   J/A+A/502/253 : V636 Cen radial velocities curves (Clausen+, 2009)


Byte-by-byte Description of file: table11.dat

   Bytes Format Units   Label     Explanations

   1- 13  F13.5 d       HJD       Heliocentric Julian Date
  16- 22  F7.5  ---     Phase     Orbital phase
  25- 29  F5.3  mag     Dymag     y differential magnitude
  32- 36  F5.3  mag     Db-y      b-y differential colour index
  38- 43  F6.3  mag     Dm1       m1 differential colour index
  45- 50  F6.3  mag     Dc1       c1 differential colour index
  53- 57  F5.3  mag     Dbmag     b differential magnitude
  60- 64  F5.3  mag     Dvmag     v differential magnitude
  67- 71  F5.3  mag     Dumag     u differential magnitude


Acknowledgements:
    J.V. Clausen, jvc(at)astro.ku.dk

References:
    Clausen et al.,  Paper I       2001A&A...374..980C
    Clausen et al.,  Paper II      2009A&A...502..253C, Cat. J/A+A/502/253
(End)  J.V. Clausen [Niels Bohr Inst. Copenhagen], P. Vannier [CDS]  18-Dec-2009