J/A+A/694/A65 10 eclipsing binaries radial velocities (Graczyk+, 2025)
Surface brightness-colour relations of dwarf stars from detached eclipsing
binaries. II. Extension of calibrating sample.
Graczyk D., Pietrzynski G, Galan C., Miller N., Gieren W., Zgirski B.,
Hajdu G., Kaluszynski M., Chini R., Gallenne A., Gorski M., Karczmarek P.,
Kervella P., Kicia M., Maxted P.F.L., Nardetto N., Narloch W., Pilecki B.,
Pych W., Rojas Garcia G., Smolec R., Suchomska K., Taormina M.,
Wielgorski P.
<Astron. Astrophys. 694, A65 (2025)>
=2025A&A...694A..65G 2025A&A...694A..65G (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Binaries, spectroscopic ; Stars, fundamental
Keywords: binaries: eclipsing - binaries: spectroscopic - stars: distances
Abstract:
Surface brightness-colour relations (SBCRs) are useful tools for
predicting the angular diameters of stars. They offer the possibility
to calculate precise spectrophotometric distances by the eclipsing
binary method or the Baade-Wesselink method. Double-lined Detached
Eclipsing Binary stars (SB2 DEBs) with precisely known trigonometric
parallaxes allow for the calibration of SBCRs with high precision. In
order to improve such calibrations, it is important to enlarge the
sample of suitable eclipsing binaries with precisely determined
physical parameters.
We selected 10 SB2 DEBs within 0.8kpc of the Sun with components of
spectral types from B9 to K3. We analysed TESS and Kepler K2
space-based photometry simultaneously with radial velocities derived
from HARPS spectra using the Wilson-Devinney code. Disentangled
spectra of DEBs were used to derive atmospheric parameters of their
components by applying the GSSP code.
Direct effective temperatures were also calculated using spectral
energy distribution analysis. The O-C diagrams of minima times were
investigated in order to detect long-term period changes or apsidal
motions. Most of the systems are composed of significantly unequal
components with mass ratios as low as ∼0.5. We derived precise masses,
radii and surface temperatures for them, as well as their
metallicities. The average precision of mass and radii determinations
is 0.3% and 1.4% for the surface temperature. The spectroscopic and
photometric temperatures of the components are usually consistent to
within 100K but in some systems the difference is much larger.
Components of HD 149946 show the highest difference (up to 400K) and
the atmospheric models favours different surface metallicities. We
also provide an updated calibration of the equivalent width of the
interstellar sodium D1 line and the reddening E(B-V).
Description:
Radial velocities of 10 eclipsing binary stars from the Milky Way
derived from spectra obtained with the HARPS spectrograph are
presented. The eclipsing binaries observed are: CG Scl, HD 27476, AW
Col, TYC 6511-1799-1, BD+17 1832, TYC 266-718-1, HD 149946, HD 159246,
VZ PsA, HD 219869. For each eclipsing binary its name, barycentric
Julian date of observation, radial velocity of a primary star, its
error, radial velocity of a secondary star and its error are given.
The radial velocities are reduced to the solar system barycenter.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 95 10 Basic data on the eclipsing binary stars studied
in the current work
tablec3.dat 56 127 Radial velocities of 10 eclipsing binary stars
--------------------------------------------------------------------------------
See also:
J/A+A/666/A128 : 10 eclipsing binaries photometry and velocimetry
(Graczyk+, 2022)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of an eclipsing binary
17- 18 I2 h RAh Right ascension (J2000)
20- 21 I2 min RAm Right ascension (J2000)
23- 27 F5.2 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 39 F4.1 arcsec DEs Declination (J2000)
41- 46 F6.3 mas plx Gaia parallax
48- 52 F5.3 mas e_plx Gaia parallax error
54- 59 F6.3 mag Vmag V magnitude
61- 65 F5.3 mag e_Vmag V magnitude error
67- 72 F6.3 mag B-V B-V colour index
74- 78 F5.3 mag e_B-V B-V colour index error
80- 85 F6.3 d Porb Orbital period
87- 95 A9 --- SpType Refined spectral types given in Sect. 5.4
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablec3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 15 A15 --- Name Name of an eclipsing binary
17- 26 F10.5 d BJD Barycentric Julian date of observation
(BJD-2450000)
28- 35 F8.3 km/s RV1 Radial velocity of a primary
37- 41 F5.3 km/s e_RV1 Error of radial velocity of a primary
43- 50 F8.3 km/s RV2 Radial velocity of a secondary
52- 56 F5.3 km/s e_RV2 Error of radial velocity of a secondary
--------------------------------------------------------------------------------
Acknowledgements:
Dariusz Graczyk, darek(at)ncac.torun.pl
References:
Graczyk et al., Paper I 2022A&A...666A.128G 2022A&A...666A.128G, Cat. J/A+A/666/A128
(End) Dariusz Graczyk [CAMK, Poland], Patricia Vannier [CDS] 07-Jan-2025