J/A+A/588/A10 HD 149404 FEROS, Coralie and IUE spectra (Raucq+, 2016)
Observational signatures of past mass-exchange episodes in massive binaries :
The case of HD 149404.
Raucq F., Rauw G., Gosset E., Naze Y., Mahy L., Herve A., Martins F.
<Astron. Astrophys. 588, A10 (2016)>
=2016A&A...588A..10R 2016A&A...588A..10R (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Stars, supergiant ; Spectroscopy
Keywords: stars: early-type - stars: fundamental parameters -
binaries: spectroscopic - stars: individual: HD 149404 -
stars: massive
Abstract:
Mass and momentum exchanges in close massive binaries play an
important role in their evolution, and produce several observational
signatures such as asynchronous rotation and altered chemical
compositions, that remain after the stars detach again.
We investigated these effects for the detached massive O-star binary
HD 149404 (O7.5 If + ON9.7 I, P=9.81-days), which is thought to have
experienced a past episode of case A Roche-lobe overflow (RLOF).
Using phase-resolved spectroscopy, we performed the disentangling of
the optical spectra of the two stars. The reconstructed primary and
secondary spectra were then analysed with the CMFGEN model atmosphere
code to determine stellar parameters, such as the effective
temperatures and surface gravities, and to constrain the chemical
composition of the components. We complemented the optical study with
the study of IUE spectra, which we compare to the synthetic binary
spectra. The properties of the stars were compared to evolutionary
models.
Description:
The best quality wavelength-calibrated and normalized spectra of
HD 149404 are provided. These data were obtained with the FEROS and
Coralie spectrographs, and with the International Ultraviolet
Explorer. The wavelengths are given in the heliocentric frame of
reference.
Objects:
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RA (2000) DE Designation(s)
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16 36 22.56 -42 51 31.9 HD 149404 = HR 6164
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 53 93 List of the spectra of HD 149404
sp/* . 93 Individual fits spectra
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 --- HJD Date of the observation (HJD-2400000)
15- 21 A7 --- Inst Name of the observing instrument
25- 28 F4.2 --- Phase Phase of the observation
31- 34 I4 0.1nm lambdal Lower value of wavelength interval
35 A1 --- --- [-]
36- 39 I4 0.1nm lambdau Upper value of wavelength interval
42- 53 A12 --- FileName Name of the associated FITS spectrum in
subdirectory sp (1)
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Note (1): Coralie spectra of HD 149404 from 3950 to 4144Å (a),
from 4230 to 4750Å (b), from 4905 to 5065Å (c), and
from 5380 to 6740Å (d), named CorNNNNa.fit.
Feros spectra of HD 149404 from 3950 to 4144Å (a),
from 4230 to 4750Å (b), from 4905 to 5065Å (c), and
from 5380 to 6740Å (d). named FerNNNNa.fit.
IUE SWP spectra of HD 149404 from 1150 to 1980Å named swpNNNNN.fit
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Acknowledgements:
Francoise Raucq, fraucq(at)doct.ulg.ac.be
(End) Francoise Raucq [Liege University], Patricia Vannier [CDS] 28-Jan-2016