J/A+A/649/A109 Radial velocities of 4 eclipsing binaries (Graczyk+, 2021)
The surface brightness-colour relations based on eclipsing binary stars and
calibrated with Gaia EDR3.
Graczyk D., Pietrzynski G., Galan C., Gieren W., Tkachenko A.,
Anderson R.I., Gallenne A., Gorski M., Hajdu G., Kaluszynski M.,
Karczmarek P., Kervella P., Maxted P.F.L., Nardetto N., Narloch W.,
Pavlovski K., Pilecki B., Pych W., Southworth J., Storm J., Suchomska K.,
Taormina M., Villanova S., Wielgorski P., Zgirski B., Konorski P.
<Astron. Astrophys. 649, A109 (2021)>
=2021A&A...649A.109G 2021A&A...649A.109G (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby ; Radial velocities
Keywords: parallaxes - binaries: eclipsing - stars: distances
Abstract:
The surface brightness-colour relation (SBCR) is a basic tool for
establishing precise and accurate distances within the Local Group.
Detached eclipsing binary stars with accurately determined radii and
trigonometric parallaxes allow calibration of the SBCRs with
unprecedented accuracy.
We analysed four nearby eclipsing binary stars containing late F-type
main sequence components: AL Ari, AL Dor, FM Leo, and BN Scl. We
determined very precise spectroscopic orbits and combined them with
high-precision ground- and space-based photometry. We derived the
astrophysical parameters of their components with mean errors of 0.1%
for mass and 0.4% for radius. We combined those four systems with
another 24 nearby eclipsing binaries with accurately known radii from
the literature for which Gaia EDR3 parallaxes are available in order
to derive the SBCRs.
The resulting SBCRs cover stellar spectral types from B9 V to G7 V.
For calibrations, we used Johnson optical B and V , Gaia GBP and G,
and 2MASS JHK bands. The most precise relations are calibrated using
the infrared K band and allow angular diameters of A-, F-, and G-type
dwarf and subgiant stars to be predicted with a precision of 1%
Description:
Streomgren uvby photometry of AL Ari and radial velocity measurements
of four eclipsing binaries AL Ari, AL Dor, FM Leo and BN Scl are
presented.
Objects:
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RA (2000) DE Designation(s)
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02 42 36.34 +12 44 07.8 AL Ari = HIP 12657
04 46 52.26 -60 36 12.7 AL Dor = HIP 22229
11 12 45.09 +00 20 52.8 FM Leo = HIP 54766
23 07 42.75 -30 14 00.0 BN Scl = HIP 114206
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 87 4 Basic daata on the eclipsing binary stars
table2.dat 42 827 *Stromgren normalized ubvy photometry of AL Ari
table3.dat 54 92 Velocimetry of four eclipsing binary stars
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Note on table2.dat: Unpublished photometry from Clausen et al.
(2001A&A...374...980C).
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See also:
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Star name
8- 9 I2 h RAh Simbad Right Ascension (J2000.0)
11- 12 I2 min RAm Simbad Right Ascension (J2000.0)
14- 18 F5.2 s RAs Simbad Right Ascension (J2000.0)
20 A1 --- DE- Simbad Declination sign (J2000.0)
21- 22 I2 deg DEd Simbad Declination (J2000.0)
24- 25 I2 arcmin DEm Simbad Declination (J2000.0)
27- 30 F4.1 arcsec DEs Simbad Declination (J2000.0)
32- 37 F6.3 mag plx Gaia/EDR3 parallax
39- 43 F5.3 mag e_plx rms uncertainty on plx
45- 51 A7 --- SpType Spectral type primary+secondary
53- 57 F5.3 mag Vmag V magnitude
59- 63 F5.3 mag e_Vmag rms uncertainty on Vmag
65- 69 F5.3 mag B-V B-V colour index
71- 75 F5.3 mag e_B-V rms uncertainty on B-V
77- 84 F8.5 d Pobs Observed period
86- 87 I2 --- NRV Number of radial velocity measurements
in table3.dat
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d Date Observation date (HJD-2450000)
12- 18 F7.5 --- Fu Normalized flux in u band
20- 26 F7.5 --- Fv Normalized flux in v band
28- 34 F7.5 --- Fb Normalized flux in b band
36- 42 F7.5 --- Fy Normalized flux in y band
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Name of eclipsing binary star (1)
8- 17 F10.5 d Date Observation date (HJD-2450000)
19- 25 F7.3 km/s RV1 Radial velocity of primary star (2)
27- 31 F5.3 km/s e_RV1 Error of RV1
33- 40 F8.3 km/s RV2 Radial velocity of secondary star (2)
42- 46 F5.3 km/s e_RV2 Error of RV2
48- 54 A7 --- Inst Spectrograph used (CORALIE or HARPS)
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Note (1): Eclipsing binary stars are AL Ari, AL Dor, BN Scl and FM Leo.
Note (2): Radial velocities are reduced to the solar system barycenter
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Acknowledgements:
Dariusz Graczyk, darek(at)ncac.torun.pl
(End) Patricia Vannier [CDS] 15-Mar-2021