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J/A+AS/128/475      Spectroscopy of MWC 158                      (Jaschek+ 1998)
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B[e] stars. V. HD 50138 = MWC 158
       Jaschek C., Andrillat Y.
      <Astron. Astrophys. Suppl. Ser. 128, 475 (1998)>
      =1998A&AS..128..475J      (SIMBAD/NED BibCode)
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ADC_Keywords: Equivalent widths ; Spectra, infrared ; Spectroscopy
Keywords: star emission line, B[e] - stars: peculiar -
          stars: individual: HD 50138

Abstract:
    On the basis of spectroscopic CCD material obtained at the Haute
    Provence Observatory, we provide line identifications and equivalent
    width measurements in the wavelength region 3738-10232 A of the
    spectrum of HD 50138 Over two hundred features are identified and a
    comparison of our results with those of other authors is provided. We
    also discuss the variability of the lines using equivalent widths and
    descriptions of the line spectrum. We attribute as a best compromise a
    spectral type of B 5 III. We conclude that the gaseous shell
    surrounding the star has a temperature of the order of 10 000K and
    that its distance to the star is of the order of two stellar radii. We
    discuss the relation of this star to others previously analyzed and
    warn against hasty generalizations.

Objects:
    ----------------------------------------------------------
       RA   (2000)   DE      Designation(s)
    ----------------------------------------------------------
    06 51 33.3   -06 58 00   HD 50138 = MWC 158
    ----------------------------------------------------------

File Summary:
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  FileName        Lrecl  Records   Explanations
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ReadMe             80        .   This file
table2.dat         78      221   Combined list of lines visible in HD 50138
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See also:
       J/A+AS/117/281 : B[e] stars. I. HD 51585 (= OY Gem) (Jaschek+, 1996)
       J/A+AS/118/495 : B[e] stars. II. MWC 349 A (Andrillat+ 1996)
       J/A+AS/120/99  : B[e] stars. III. MWC 645 (Jaschek+, 1996)
       J/A+AS/124/441 : B[e] stars. IV. MWC 142 (Andrillat+ 1997)
       J/A+AS/131/479 : B[e] stars. VI. MWC 297 ((Andrillat+ 1998)

Byte-by-byte Description of file: table2.dat
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   Bytes Format Units   Label     Explanations
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   1-  8  F8.2  0.1nm   Lambda    Laboratory wavelength (1)
       9  A1    ---   n_Lambda    [*?] Note on Lambda (2)
  10- 12  A3    ---     Char      [a,ed ] a/e: absorption or emission
                                           characteristic of the line;
                                          ed: double emission
      14  A1    ---     Wide      [w] w: wide
  15- 20  F6.3  0.1nm   EW        ? Equivalent width of the line
      21  A1    ---     ---       [,]
  22- 25  F4.2  0.1nm   EW2       ? Second equivalent width
                                                       (only for lambda=8750.47)
  27- 30  A4    ---   n_EW        [:)+pf ?] Note on EW (3)
  32- 36  F5.2  0.1nm   EW3       ?
  38- 40  F3.1  0.1nm   EW4       ?
  42- 77  A36   ---     Ident     Line identification of the order element
                                   ionization stage and multiplet number (4)
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Note (1): 5688 - 5782 Atmospheric band H2O
          5878 - 5984 Atmospheric band H2O
          6277 - 6305 Atmospheric absorption O2
          6472 - 6585 Atmospheric absorption H2O
          6717 - 6731 Atmospheric absorption H2O
          6964 - 7077 Atmospheric absorption H2O
          7186 - 7400 Atmospheric absorption H2O
          7866 - 8050 Atmospheric absorption H2O
Note (2): *: line visible on spectrogram v, taken in March 96. In this case,
              no equivalent width is given.
          ?: uncertainty flag
Note (3): ")": Central line depth. The intensity of the continuum is 1.00. a
               rough equivalence with equivalent width is W = 3 depth, but this
               is valid only for weak lines.
          "w": wide
          ":": indicates a uncertain value
          +p : refers to the preceding line
          +f : refers to the following line
Note (4): J: Fe II lines listed by Johansson (1978PhS....18..217J), followed
             by their intensity in Johansson's scale
         **: probably He I 3885.65, from the ^3^P^0^ series, also present.
  "Hamann and Persson": Hammann F. and Persson S.E., 1989ApJS...71..931H
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(End)                                         Patricia Bauer [CDS]   25-Jul-1997