J/AJ/145/41 Radial velocities of 33 spectroscopic binaries (Katoh+, 2013)
Determination of orbital elements of spectroscopic binaries using
high-dispersion spectroscopy.
Katoh N., Itoh Y., Toyota E., Sato B.
<Astron. J., 145, 41 (2013)>
=2013AJ....145...41K 2013AJ....145...41K
ADC_Keywords: Binaries, spectroscopic ; Radial velocities ; Stars, masses ;
Effective temperatures
Keywords: binaries: spectroscopic - stars: solar-type -
techniques: radial velocities
Abstract:
Orbital elements of 37 single-lined spectroscopic binary systems
(SB1s) and 5 double-lined spectroscopic binary systems (SB2s) were
determined using high-dispersion spectroscopy. To determine the
orbital elements accurately, we carried out precise Doppler shift
measurements using the HIgh Dispersion Echelle Spectrograph mounted on
the Okayama Astrophysical Observatory 1.88 m telescope. We achieved a
radial-velocity precision of ∼10 m.s-1 over seven years of
observations. The targeted binaries have spectral types between F5 and
K3, and are brighter than the 7th magnitude in the V band. The orbital
elements of 28 SB1s and 5 SB2s were determined at least 10 times more
precisely than previous measurements. Among the remaining nine SB1s,
five objects were found to be single stars, and the orbital elements
of four objects were not determined because our observations did not
cover the entire orbital period. We checked the absorption lines from
the secondary star for 28 SB1s and found that three objects were in
fact SB2s.
Description:
We observed 37 single-lined Spectroscopic Binary Systems (SB1s) and 5
double-lined spectroscopic binary systems (SB2s) using precise Doppler
shift (radial velocity) measurements every one or two months since
2003. In total, observations were taken over about 100 nights. We used
the 1.88m telescope and the HIgh Dispersion Echelle Spectrograph
(HIDES) at Okayama Astrophysical Observatory (OAO). Until 2007
November, HIDES was equipped with a single 2K*4K CCD and the
observational wavelengths ranged from 5000Å to 6100Å. Since 2007
December, when HIDES was upgraded to three CCDs, the observational
range expanded to 3750-7500Å with a RED cross-disperser. The
spectral resolution (R=λ/Δλ) was ∼60000 with a
200µm (0.76") width slit. Exposure times were 120-1800s depending
on the target luminosity and weather conditions. We obtained typical
signal-to-noise ratios of 100-200 for a sixth magnitude star with an
exposure time of less than 1800s. We observed, on average, 20 stars
per night. Each object was observed an average of 20 times.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 42 Targets of the radial velocity measurements
table2.dat 46 1276 Radial velocities of 33 samples
table3.dat 127 33 Orbital elements determined for 33 binaries
table4.dat 108 33 Physical parameters of the binaries obtained
from the new orbital elements
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
V/136 : Teff and metallicities for Tycho-2 stars (Ammons+, 2006)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
J/A+A/465/257 : Radial velocity in multiple systems (Tokovinin+, 2007)
J/A+A/473/829 : Orbital elements of 156 spectros. binaries (Mermilliod+, 2007)
J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number of the binary
8- 13 I6 --- HIP HIP number of the binary
15- 16 I2 h RAh Hour of Right Ascension (J2000)
18- 19 I2 min RAm Minute of Right Ascension (J2000)
21- 26 F6.3 s RAs Second of Right Ascension (J2000)
28 A1 --- DE- Sign of the Declination (J2000)
29- 30 I2 deg DEd Degree of Declination (J2000)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000)
35- 39 F5.2 arcsec DEs Arcsecond of Declination (J2000)
41- 44 F4.2 mag Vmag V-band magnitude
46- 51 F6.2 mas Plx Parallax
53- 59 A7 --- SpT Spectral type
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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- 2 A2 --- --- [HD]
3- 8 I6 --- HD HD number of the binary
10- 20 F11.5 d BJD Barycentric Julian Date (BJD-UTC-2400000) (1)
22- 29 F8.1 m/s RV Radial velocity
31 A1 --- f_RV [d] Previous velocity corrected with the offset
in table3
33- 38 F6.1 m/s e_RV Uncertainty in RV
40- 46 F7.1 m/s O-C ? The (O-C) offset
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Note (1): We converted HJD to BJD-UTC with a calculation code of Eastman et al.
(2010PASP..122..935E 2010PASP..122..935E).
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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 I6 --- HD HD number of the binary
8- 18 F11.5 d Per Orbital period
20- 27 F8.5 d e_Per Uncertainty in Per
29- 36 F8.3 d T0 Periastron time (JD-2450000)
38- 43 F6.3 d e_T0 Uncertainty in T0
45- 50 F6.4 --- e Orbital eccentricity
52- 57 F6.4 --- e_e Uncertainty in e
59- 64 F6.2 deg omega Argument of periastron ω
66- 70 F5.2 deg e_omega Uncertainty in omega
72- 77 F6.3 km/s K Radial velocity semi-amplitude of the primary
79- 83 F5.3 km/s e_K Uncertainty in K
85- 89 F5.1 m/s sigma1 HIDES standard deviation of the radial velocity
91- 96 F6.1 m/s sigma2 Standard deviation of the radial velocity
measured in this work and previous studies
98 I1 --- Ref1 [1] Reference for HIDES radial velocity measured
in this work
100-101 I2 --- Ref2 ? Reference for published radial velocity (G1)
103-110 F8.4 km/s Off1 ? Offset between HIDES radial velocity (in Ref1)
and published radial velocity (in Ref2)
112 I1 --- Ref3 ? Reference for published radial velocity (G1)
114-121 F8.4 km/s Off2 ? Offset between HIDES radial velocity (in Ref1)
and published radial velocity (in Ref3)
123-127 F5.1 m/s O-C The mean (O-C)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HD HD number of the binary
8- 14 F7.3 Gm a1sini Semimajor axis of the primary star (1)
16- 21 F6.3 Gm e_a1sini Uncertainty in a1sini
23- 30 F8.5 AU a Primary-secondary mean distance (2)
32- 38 F7.5 AU e_a Uncertainty in a
40- 44 F5.2 km/s V0 Systemic velocity (3)
46- 49 F4.2 km/s e_V0 Uncertainty in V0
51- 57 F7.5 Msun f(m) Mass function (4)
59- 65 F7.5 Msun e_f(m) Uncertainty in f(m)
67- 70 I4 K Teff Effective temperature of the primary star
72 A1 --- r_Teff Reference for Teff (G1)
74- 76 I3 K e_Teff ? Uncertainty in Teff (5)
78- 81 F4.2 Msun M1 Mass of the primary star (6)
83- 86 F4.2 Msun e_M1 ? Uncertainty in M1
88- 92 F5.3 Msun M2 Mass of the secondary star (7)
94- 98 F5.3 Msun e_M2 Uncertainty in M2
100-103 F4.2 --- q Mass ratio M1/M2 (8)
105-108 F4.2 --- e_q ? Uncertainty in q
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Note (1): a1=KP(1-e2)0.5/2Πsini (equation (4) in the paper), where K is
the amplitude of the radial velocity, P is the Period, e is the
eccentricity, and i is the inclination. Since the inclination was not
obtained from the observations, we described the semimajor axis of the
primary star as a1sini.
Note (2): a=a1+a2=a1(1+1/q) (eq. (5) in the paper), where a2 is the semimajor
axis of the secondary star. Include the uncertainty in inclination.
Note (3): Include the uncertainty in inclination.
Note (4): Calculated with the Equation (3) in the paper.
Note (5): Blank = the uncertainty is not listed in the previous study.
Note (6): Calculated using the mass-temperature relationship for main-sequence
star: log(M1/M☉)=(1.471logT1)-5.545 (Equation (2) in the paper).
Note (7): Determined to be the minimum mass because the inclination was not
obtained by our observations. Calculated using the mass of the primary star
and the mass function (Equation (3) in the paper). Include the uncertainty
in inclination.
Note (8): Include the uncertainty in inclination.
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Global notes
Note (G1): References as follows:
2 = Vogt et al. (2002ApJ...568..352V 2002ApJ...568..352V);
3 = Beavers & Eitter (1986ApJS...62..147B 1986ApJS...62..147B);
4 = Batten et al. (1983JRASC..77..241B 1983JRASC..77..241B);
5 = Nidever et al. (2002, cat. J/ApJS/141/503);
6 = Abt & Levy (1976ApJS...30..273A 1976ApJS...30..273A);
7 = Tokovinin & Gorynya (2007, cat. J/A+A/465/257);
8 = Struve & Zebergs (1959AJ.....64..219S 1959AJ.....64..219S);
9 = Duquennoy et al. (1991A&AS...88..281D 1991A&AS...88..281D);
10 = Tokovinin (1991A&AS...91..497T 1991A&AS...91..497T);
11 = Pourbaix (2000A&AS..145..215P 2000A&AS..145..215P);
12 = Sarma (1962ApJ...135..301S 1962ApJ...135..301S);
a = Allende Prieto & Lambert (1999, cat. J/A+A/352/555);
b = Torres et al. (2010, cat. J/other/A+ARV/18.67);
c = Wright et al. (2003, cat. III/231);
d = Casagrande et al. (2011, cat. J/A+A/530/A138);
e = Ammons et al. (2006, cat. V/136);
f = Valentini & Munari (2010, cat. J/A+A/522/A79).
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 14-Mar-2014