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J/A+A/337/183     V1046 Ori uvby photometry and radial velocities (Bolton+ 1998)
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HD 37017 = V1046 Ori. A double-lined spectroscopic binary with a
B2e He-strong magnetic primary
       Bolton C.T., Harmanec P., Lyons R.W., Odell A.P., Pyper D.M.
      <Astron. Astrophys. 337, 183 (1998)>
      =1998A&A...337..183B      (SIMBAD/NED BibCode)
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ADC_Keywords: Binaries, spectroscopic ; Photometry, uvby ; Radial velocities
Keywords: stars: binaries: spectroscopic - stars: fundamental parameters -
          stars: oscillations - stars: individual: HD 37017 = V1046 Ori

Abstract:
    We report on a detailed spectroscopic and photometric study of V1046
    Orionis undertaken to resolve uncertainties about the period(s) and
    causes of the spectroscopic and photometric variations of this
    helium-strong star. We have detected the lines of the secondary star
    in an extensive series of photographic and electronic spectra. This
    eliminates any doubt about the duplicity of this star. The orbital
    elements we derive from our measures of these spectra confirm the
    unusually large orbital eccentricity, e=0.433, for the short,
    P=18.65612d, orbital period. The line profiles, V/R ratio of the
    double H{alpha} emission, residuals of the primary radial velocities
    from the orbital velocity curve, brightness and colour of the object,
    magnetic field, and radio emission of this system all vary with a
    period of 0.9011836d. We tentatively follow earlier investigators in
    interpreting this as the rotational period of the primary and
    summarize the evidence of the phase shifts among the different
    phenomena, using the accurate value of the 0.9d period, to put tight
    constraints on any future model of these changes. We postpone our own
    attempt at a quantitative modelling of the variations with the 0.9d
    period for a separate study.

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    05 35 21.8   -04 29 38   V1046 Ori = HD 37017 = HR 1890
    ----------------------------------------------------------

File Summary:
--------------------------------------------------------------------------------
  FileName      Lrecl  Records   Explanations
--------------------------------------------------------------------------------
ReadMe             80        .   This file
table3.dat         59       77   V1046 Ori individual uvby photometric
                                  observations from several stations
table5.dat         57       29   V1046 Ori radial velocities measured on
                                  David Dunlap photographic spectra
tables.tex         82      197   LaTeX version of the tables
tables.ps          72      403   PostScript version of the tables
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Byte-by-byte Description of file: table3.dat
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   Bytes Format Units   Label     Explanations
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   1- 12  F12.4 d       HJD       Heliocentric Julina date
  14- 18  F5.3  mag     ymag      y magnitude
  20- 24  F5.3  mag     bmag      ? b magnitude
  26- 30  F5.3  mag     umag      u magnitude
  32- 36  F5.3  mag     vmag      ? v magnitude
  38- 42  F5.3  mag     b-v       ? b-v colour index
  44- 47  F4.3  mag     u-b       ? u-b colour index
  49- 52  F4.3  mag     c1        ? c1 colour index
  54- 57  F4.3  mag     m1        ? m1 colour index
      59  I1    ---     Obs       Observing station code (1)
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Note (1): Numbers in column `Obs" correspond to those in column "Instrument"
           of Table 2:
          1: Catalina station of Lunar and Planetary Lab.
              Johnson et al. 1966, Cat. <II/5>
          2: 0.5-m reflector, Sutherland, South Africa (Balona, priv. com.)
          4: Danish 0.5-m reflector, La Silla (Maitzen, 1981, priv.com.)
          6: 0.8-m Four College Automatic photoelectric telescope, USA
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Byte-by-byte Description of file: table5.dat
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   Bytes Format Units   Label        Explanations
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   1- 11  F11.3 d       HJD          Heliocentric Julian date
  13- 17  F5.1  km/s    RV1(H+He)    Measured radial velocity for mean H+He
  19- 23  F5.1  km/s    RV1(HeI)     Measured radial velocity for HeI
  25- 29  F5.1  km/s    RV1(He416.9) ? Measured radial velocity for He 416.9
  31- 35  F5.1  km/s    RV2(MgII)    ? Measured radial velocity for Mg II
  37- 40  F4.1  km/s    RV(CaII)     ? Measured radial velocity for Ca II
  42- 45  F4.2  nm      FWHM         Full widths at half maximum of He 447.1
  47- 51  F5.3  ---     Ic           Central intensity of He 447.1
  53- 57  F5.3  nm      EW           Equivalent width of He 447.1
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Acknowledgements: Petr Harmanec <hec@sunstel.asu.cas.cz>
                  C. Tom Bolton <bolton@struve.astro.utoronto.ca>
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(End)                                         Patricia Bauer [CDS]   12-Jun-1998