J/AJ/162/66 Radial Velocities in HD50526 system with CORALIE (Rosales+, 2021)
Stellar and accretion disk parameters of the close binary HD 50526.
Rosales J.A., Mennickent R.E., Djurasevic G., Schleicher D.R.G.,
Zharikov S., Araya I., Celedon L., Cure M.
<Astron. J., 162, 66-66 (2021)>
=2021AJ....162...66R 2021AJ....162...66R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple; Radial velocities; Spectra, optical
Keywords: Close binary stars; Semi-detached binary stars
Spectroscopic binary stars; Early-type stars; Stellar mass loss
Abstract:
We present a photometric and spectroscopic study of HD50526, an
ellipsoidal binary member of the group Double Periodic Variable stars.
Performing data mining in photometric surveys and conducting new
spectroscopic observations with several spectrographs during
2008-2015, we obtained orbital and stellar parameters of the system.
The radial velocities were analyzed with the genetic PIKAIA algorithm,
whereas Doppler tomography maps for the Hα and Hβ lines
were constructed with the Total Variation Minimization code. An
optimized simplex algorithm was used to solve the inverse problem
adjusting the light curve with the best stellar parameters for the
system. We find an orbital period of 6.701±0.001d and a long
photometric cycle of 191±2 days. We detected the spectral features
of the coldest star and modeled it with a logg=2.79±0.02dex giant
of mass 1.13±0.02 M☉ and effective temperature 10500±125K.
In addition, we determine a mass ratio q=0.206±0.033 and that the
hot star is a B-type dwarf of mass 5.48±0.02M☉. The V-band
orbital light curve can be modeled including the presence of an
accretion disk around the hotter star. This fills the Roche lobe of
the hotter star and has a radius 14.74±0.02R☉ and the
temperature at the outer edge is 9400 K. Two bright spots located in
the disk account for the global morphology of the light curve. The
Doppler tomography maps of Hα and Hβ reveal complex
structures of mass fluxes in the system.
Description:
We find evidence of mass transfer from the cold to the hot star, we
then name them donor and gainer, respectively.
The radial velocities for the donor and gainer stars were measured
through Gaussian fits in the CORALIE spectra.
Objects:
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RA (2000) DE Designation(s) (Period)
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06 54 02.03 +06 48 48.7 HD 50526 = HD 50526 (P=6.701d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table6.dat 26 37 Radial velocities of the donor using the
Hα line in CORALIE spectra
table7.dat 25 26 Radial velocities of the gainer and their
respective errors, using the HeI 4471.477Å
line in CORALIE spectra
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See also:
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
J/AcA/63/323 : OGLE-III SMC eclipsing binary stars (Pawlak+, 2013)
J/MNRAS/448/1137 : Radial velocity curve of HD170582 donor (Mennickent+, 2015)
Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 12 F12.8 d HJD [562/969] Heliocentric Julian Date; HJD-2454000
14- 19 F6.4 km/s e_RVel [0.03/1] Error on RVel
21- 26 F6.1 km/s RVel [-157.6/166] Radial velocity
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.8 d HJD [562/969] Heliocentric Julian Date; HJD-2454000
14- 19 F6.4 km/s e_RVel [0.1/1] Error on RVel
21- 25 F5.1 km/s RVel [-47.3/52.3] Radial velocity
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 17-Jan-2022