J/A+AS/128/475 Spectroscopy of MWC 158 = HD 50138 (Jaschek+ 1998)
B[e] stars. V. HD 50138 = MWC 158
Jaschek C., Andrillat Y.
<Astron. Astrophys. Suppl. Ser. 128, 475 (1998)>
=1998A&AS..128..475J 1998A&AS..128..475J (SIMBAD/NED BibCode)
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:
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RA (2000) DE Designation(s)
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06 51 33.3 -06 58 00 HD 50138 = MWC 158
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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 1978PhS....18..217J), followed
by their intensity in Johansson's scale
**: probably He I 3885.65, from the 3P0 series, also present.
"Hamann and Persson": Hammann F. and Persson S.E., 1989ApJS...71..931H 1989ApJS...71..931H
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(End) Patricia Bauer [CDS] 25-Jul-1997