J/AJ/156/194 Orbits of double-lined pairs in multiple stars (Tokovinin, 2018)
Spectroscopic orbits of subsystems in multiple stars.
IV. Double-lined pairs.
Tokovinin A.
<Astron. J., 156, 194 (2018)>
=2018AJ....156..194T 2018AJ....156..194T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, double and multiple ; Binaries, orbits ;
Spectral types ; Proper motions ; Radial velocities ;
Rotational velocities ; Stars, masses
Keywords: binaries: spectroscopic - binaries: visual
Abstract:
Spectroscopic orbits are computed for inner pairs in nine hierarchical
multiple systems (HIP 19639, 60845, 75663, 76816, 78163, 78416, 80448,
84789, and HD 105080) and for one simple binary HIP 61840. All subsystems
are double-lined, and their periods range from 2.27 to 30.4 days. Five
spectroscopic binaries are twins with equal masses. Each hierarchical
system is discussed individually, providing estimates of outer periods,
masses, orbital inclination, and axial rotation. For systems with three
resolved visual components (HIP 60845 and 80448), the outer and inner
visual orbits are determined, complementing the description of their
architecture. The radial velocities of HIP 75663A, 76816B, and 78163B
are found to be variable with long periods, implying that these
hierarchies are 2 + 2 quadruples. The period-eccentricity relation for
spectroscopic subsystems is discussed.
Description:
The spectra used here were taken with the 1.5 m telescope sited at the
Cerro Tololo Inter-American Observatory (CTIO) in Chile and operated
by the SMARTS Consortium (http://www.astro.yale.edu/smarts/). The observing
time was allocated through NOAO. Observations were made with the CHIRON
optical echelle spectrograph (Tokovinin et al. 2013PASP..125.1336T 2013PASP..125.1336T) by
the telescope operators in service mode. In two runs, 2017 August and
2018 March, the author also observed in classical mode. All spectra are
taken in the slicer mode with a resolution of R=80000 and a signal-to-noise
ratio of at least 20.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 18 Basic parameters of observed multiple systems
table2.dat 42 29 Cross-Correlation Function (CCF) parameters
table3.dat 138 10 Spectroscopic orbits
table4.dat 93 5 Visual orbits
table5.dat 65 105 Radial velocities and residuals
table6.dat 32 38 Radial velocities of other components
table7.dat 61 125 Position measurements and residuals
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See also:
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/123/1023 : Binary star orbits (Seymour+, 2002)
J/other/AstBu/62.339 : Speckle interferometry of nearby multiples
(Balega+, 2007)
J/AJ/152/10 : Spectroscopy of subsystems in four multiple stars
(Tokovinin, 2016)
J/AJ/152/11 : Orbits of four triple stars (Tokovinin, 2016)
J/AJ/154/110 : Orbits based on SOAR speckle interferometry. II.
(Tokovinin, 2017)
J/AJ/156/48 : Orbits of subsystems in six multiple stars. III.
(Tokovinin, 2018)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS WDS identification (HHMMm+DDMM, J2000,
Cat. B/wds)
12- 13 A2 --- Comp System components
15- 23 A9 --- HIP Hipparcos number (Cat. I/239) (1)
25- 33 A9 --- HD Henry Draper number (Cat. III/135) (1)
35- 38 A4 --- SpType Spectral type (1)
40- 44 F5.2 mag Vmag [6.82/13.7] V band magnitude (1)
45 A1 --- u_Vmag [:] Uncertainty flag on Vmag, V-K
47- 50 F4.2 mag V-K [0.92/4.54]? V-K color index (1)
52- 54 I3 mas/yr pmRA [-95/73] Proper motion in right ascension
direction (pmRA*cosDE) (2)
56- 59 I4 mas/yr pmDE [-169/24] Proper motion in declination
direction (2)
61- 66 F6.2 km/s RV [-56.82/50.19]? Radial velocity from this work
67 A1 --- f_RV Flag on RV (v=variable radial velocity source)
69- 73 F5.2 mas Plxmean [3.15/19.93] Mean parallax (2)
75- 77 A3 --- Flag Flag for radial velocity plot
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Note (1): From Simbad.
Note (2): From Gaia DR2, Gaia collaboration (2018, Cat. I/345).
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 12 A2 --- Comp System components
14- 15 I2 --- Nobs [2/12] Number of observations
17- 21 F5.3 --- a [0.023/0.506] Amplitude of the Cross-Correlation
Function (CCF)
23- 27 F5.2 km/s sigma [3.57/27.49] Width of the CCF peak σ
29- 33 F5.3 km/s a.sigma [0.137/1.913] Product of the amplitude and width
of CCF
35- 39 F5.1 km/s Vsini [2/49] Rotational velocity
40 A1 --- u_Vsini [:] Uncertainty flag on Vsini
42 A1 --- Li [N/Y] Li 6708Å line detected?
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 15 A5 --- Comp System components
17- 24 F8.5 d Per [2.2699/30.427] Orbital period
26- 32 F7.5 d e_Per [2e-05/0.006] Uncertainty in Per
34- 43 F10.4 d T [58002.5732/58214.038] Time of periastron passage
(JD-2400000)
45- 50 F6.4 d e_T [0.0017/0.345] Uncertainty in T
52- 56 F5.3 --- e [0/0.708] Orbital eccentricity
58- 62 F5.3 --- e_e [0.001/0.003]? Uncertainty in e
63 A1 --- f_e [f] Flag on e (f=fixed parameter)
65- 69 F5.1 deg omega [0/357] Longitude of periastron for the primary
component ω
71- 74 F4.1 deg e_omega [0.3/13]? Uncertainty in omega
75 A1 --- f_omega [f] Flag on omega (f=fixed parameter)
77- 82 F6.3 km/s K1 [31.361/78.044] Radial velocity amplitude of
the primary component
84- 88 F5.3 km/s e_K1 [0.063/0.592] Uncertainty in K1
90- 96 F7.3 km/s K2 [32.128/108.452] Radial velocity amplitude of
the secondary component
98-102 F5.3 km/s e_K2 [0.114/0.698] Uncertainty in K2
104-110 F7.3 km/s gamma [-56.847/50.099] Center-of-mass velocity γ
112-116 F5.3 km/s e_gamma [0.036/0.27] Uncertainty in gamma
118-121 F4.2 km/s rms1 [0.04/0.64] Weighted rms residual for primary
component
123-126 F4.2 km/s rms2 [0.04/1.13] Weighted rms residual for secondary
component
128-132 F5.3 Msun M1sini [0.084/1.03] Primary component mass*sin(i)
134-138 F5.3 Msun M2sini [0.076/0.98] Secondary component mass*sin(i)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 15 A5 --- Comp System components
17- 22 F6.1 yr Per [20/1950] Orbital period
24- 26 F3.1 yr e_Per [0.2/0.3]? Uncertainty in Per
28- 34 F7.2 yr T [1826.7/2018.08] Time of periastron passage,
in Besselian year
36- 39 F4.2 yr e_T [0.24/0.3]? Uncertainty in T
41- 45 F5.3 --- e [0.166/0.63] Orbital eccentricity
47- 51 F5.3 --- e_e [0.009/0.02]? Uncertainty in e
53- 57 F5.3 arcsec a [0.176/4.644] Semi-major axis of the orbit
59- 63 F5.3 arcsec e_a [0.003/0.003]? Uncertainty in a
65- 69 F5.1 deg Omega [5.4/162.8] Position angle of the node Ω
71- 73 F3.1 deg e_Omega [1.2/6.5]? Uncertainty in Omega
75- 79 F5.1 deg omega [77.3/267.9] Longitude of periastron ω
81- 83 F3.1 deg e_omega [4.9/5.9]? Uncertainty in omega
85- 89 F5.1 deg i [40.4/156.1] Inclination
91- 93 F3.1 deg e_i [0.8/2.5]? Uncertainty in i
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 15 A5 --- Comp System components
17- 26 F10.4 d JD [57985.463/58316.498] Julian date (JD-2400000)
28- 33 F6.2 km/s RV1 [-98.34/97.8] Primary radial velocity
35- 39 F5.2 km/s e_RV1 [0.1/10.3] Primary error
41- 45 F5.2 km/s (O-C)1 [-3.29/8.5] Primary residual
47- 53 F7.2 km/s RV2 [-102.28/106.23]? Secondary radial velocity
55- 59 F5.2 km/s e_RV2 [0.2/10.2]? Secondary error
61- 65 F5.2 km/s (O-C)2 [-1.95/1.89]? Secondary residual
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 12 A2 --- Comp System components
14- 23 F10.4 d JD [57985.4627/58257.802] Julian date (JD-2400000)
25- 32 F8.4 km/s RV [-57.305/50.198] Radial velocity
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Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Hipparcos or HD number
11- 15 A5 --- Comp System components
17- 25 F9.4 yr Date [1880.38/2018.2539] Date, in Besselian year
27- 31 F5.1 deg PA [4.6/357.8] Position angle
33- 38 F6.4 arcsec Sep [0.0512/2.43] Separation
40- 45 F6.4 arcsec e_Sep [0.002/0.25] Error of separation
47- 51 F5.1 deg (O-C)PA [-16.2/25.9] Residual in PA
53- 59 F7.4 arcsec (O-C)Sep [-0.3974/0.3463] Residual in separation
61- 61 A1 --- Ref Measurement technique (1)
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Note (1): Measurement technique as follows:
H = Hipparcos (Cat. I/239);
S = Speckle interferometry at SOAR;
s = Speckle interferometry at other telescopes;
M = Visual micrometer measures;
G = Gaia DR2 (Cat. I/345).
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History:
From electronic version of the journal
References:
Tokovinin et al. Paper I. 2016AJ....152...11T 2016AJ....152...11T, Cat. J/AJ/152/11
Tokovinin et al. Paper II. 2016AJ....152...10T 2016AJ....152...10T, Cat. J/AJ/152/10
Tokovinin et al. Paper III. 2018AJ....156...48T 2018AJ....156...48T, Cat. J/AJ/156/48
Tokovinin et al. Paper V. 2019AJ....157...91T 2019AJ....157...91T
Tokovinin et al. Paper VI. 2019AJ....158..222T 2019AJ....158..222T
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 27-Mar-2019