J/AJ/152/10 Spectroscopy of subsystems in four multiple stars (Tokovinin, 2016)
Orbits of subsystems in four hierarchical multiple stars.
Tokovinin A.
<Astron. J., 152, 10-10 (2016)>
=2016AJ....152...10T 2016AJ....152...10T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, double and multiple ;
Binaries, spectroscopic ; Radial velocities
Keywords: binaries: general - binaries: spectroscopic - stars: low-mass
Abstract:
Seven spectroscopic orbits in nearby solar-type multiple stars are
presented. The primary of the chromospherically active star HIP9642 is
a 4.8day double-lined pair; the outer 420 year visual orbit is
updated, but remains poorly constrained. HIP12780 is a quadruple
system consisting of the resolved 6.7year pair FIN 379 Aa,Ab, for
which the combined orbit, masses, and orbital parallax are determined
here, and the single-lined binary Ba,Bb with a period of 27.8 days.
HIP28790 is a young quintuple system composed of two close binaries,
Aa,Ab and Ba,Bb, with periods of 221 and 13 days, respectively, and a
single distant component C. Its subsystem Ba,Bb is peculiar, having a
spectroscopic mass ratio of 0.89 but a magnitude difference of
∼2.2mag. HIP64478 also contains five stars: the A-component is a
29year visual pair with a previously known 4 day twin subsystem, while
the B-component is a contact binary with a period of 5.8hr, seen
nearly pole-on.
Description:
Most spectra were taken with the 1.5m telescope located at the Cerro
Tololo Interamerican Observatory (CTIO) in Chile and operated by the
Small & Moderate Aperture Research Telescope System (SMARTS)
Consortium (http://www.astro.yale.edu/smarts/). The observing time was
allocated through NOAO (programs 14B-0009, 15A-0055, 15B-0012). The
observations were made with the CHIRON fiber-fed echelle spectrograph
by the telescope operators in service mode. HIP64478 was observed in
the fiber mode with a spectral resolution of R=28000, while all of the
other stars were observed in the slicer mode with R=80000. A few
spectra taken in 2010 at the same telescope with the Fiber Echelle
(FECH) with a resolution of R=44000 are used, as well as the radial
velocities measured with the echelle spectrometer at the Du Pont 2.5m
telescope. The radial velocities were derived from the
Cross-Correlation Function (CCF) of the spectrum with a binary mask in
the spectral range from 4500 to 6500Å.
Identifications and basic data on the four multiple systems studied
here are given in Table1. Table2 contains the average parameters of
the CCFs. Spectroscopic orbital elements derived in this work are
listed in Table3. The visual orbits are assembled in Table4. The
observations used in orbit calculations are listed in two tables.
Table 5 gives, for each date, the radial velocities of the primary and
secondary components. The resolved measurements are listed in Table6
in a similar way as the radial velocities.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 6 Basic parameters of multiple systems
table2.dat 33 13 Cross-Correlation Function (CCF) parameters and
V magnitudes
table3.dat 129 7 Spectroscopic orbits
table4.dat 107 3 Visual orbits
table5.dat 71 146 Radial velocities and residuals
table6.dat 60 46 Position measurements and residuals
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
III/135 : Henry Draper Catalogue and Extension (Cannon+ 1918-1924; ADC 1989)
J/AJ/152/11 : Orbits of four triple stars (Tokovinin, 2016)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/149/8 : RV of southern visual multiple stars (Tokovinin+, 2015)
J/AJ/147/87 : From binaries to multiples. II. Statistics (Tokovinin, 2014)
J/AJ/144/56 : Speckle interferometry at SOAR in 2012 (Tokovinin+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- HIP [9642/64478] Hipparcos number (from Cat. I/239)
7- 12 I6 --- HD [12759/114630]? Henry Draper number (Cat. III/135)
14- 23 A10 --- WDS WDS identification (from Cat. B/wds)
25- 28 A4 --- SpT Spectral type from SIMBAD
30- 33 F4.2 mag Vmag [5.9/9.1] V-band magnitude from SIMBAD
35- 38 F4.2 mag B-V [0.49/0.84] B-V color index from SIMBAD
40- 43 I4 mas/yr pmRA [-81/328] Proper motion in Right Ascension
(µα) (1)
45- 48 I4 mas/yr pmDE [-108/255] Proper motion in Declination
(µδ) (1)
50- 54 F5.2 mas plx [20.4/37.7] Parallax (1)
56- 59 F4.2 mas e_plx [0.25/1.21] Uncertainty in plx
61- 65 F5.1 km/s Uvel [-63.4/11.1]? Galactic velocity U (2)
67- 71 F5.1 km/s Vvel [-59.8/-11]? Galactic velocity V (2)
73- 77 F5.1 km/s Wvel [-27.4/14.8]? Galactic velocity W (2)
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Note (1): From HIP2 (van Leeuwen 2007, Cat. I/311).
Note (2): Computed using the HIP2 (van Leeuwen 2007, Cat. I/311) astrometry and
the center-of-mass radial velocities determined here (the U axis points
away from the Galactic center).
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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- 5 I5 --- HIP [9642/64478] Hipparcos number
7- 9 A3 --- Syst System identifier
11- 15 F5.3 --- ccf [0.01/0.43] Amplitude of the Cross-Correlation
Function (CCF)
17- 21 F5.2 km/s sigma [3.3/24.8] Width of the CCF peak (σ)
23- 27 F5.3 km/s asig [0.06/1.6] Product of the amplitude and width
of CCF
29- 33 F5.2 mag Vmag [6/11.4] V-band magnitude of the components
computed from the spectroscopic flux ratios
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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- 5 I5 --- HIP [9642/64478] Hipparcos number of the primary
component
7- 13 A7 --- Syst Subsystem designation
15- 26 F12.7 d Per [0.2/2443.1] Orbital Period (P)
28- 36 F9.7 d e_Per [0/2.1] Uncertainty in Per
38- 47 F10.4 d T [54775.5/57120.6] Time of periastron passage,
in Julian Date (JD-2400000) (1)
49- 54 F6.4 d e_T [0.0004/2.5] Uncertainty in T
56- 61 F6.4 --- e [0/0.84] Orbital eccentricity
63- 68 F6.4 --- e_e [0.0015/0.017]? Uncertainty in e (2)
70- 75 F6.2 deg omega [0/196] Longitude of periastron for the primary
component (ωA)
77- 80 F4.2 deg e_omega [0.46/3.4]? Uncertainty in omega (2)
82- 87 F6.3 km/s K1 [7.4/85.2] Radial velocity amplitude of the
primary component
89- 93 F5.3 km/s e_K1 [0.04/1.7] Uncertainty in K1
95-100 F6.3 km/s K2 [8/85.4]? Radial velocity amplitude of the
secondary component
102-106 F5.3 km/s e_K2 [0.041/0.637]? Uncertainty in K2
108-113 F6.3 km/s gamma [-0.5/49.1] Center-of-mass velocity γ
115-119 F5.3 km/s e_gamma [0.04/0.24] Uncertainty in γ
121-124 F4.2 km/s rms1 [0.01/0.6] Weighted rms residual for first
component
126-129 F4.2 km/s rms2 [0.1/1.9]? Weighted rms residual for second
component
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Note (1): For circular orbits it corresponds to the radial velocity maximum.
Note (2): When no uncertainty is given for e and omega these parameters are
fixed.
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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- 5 I5 --- HIP [9642/64478] Hipparcos number
7- 11 A5 --- Syst System identifier
13- 21 F9.5 yr Per [6.6/415] Orbital period (P)
23- 28 F6.4 yr e_Per [0.005/0.34]? Uncertainty in Per
30- 37 F8.3 yr T [1997.2/2327.6] Time of periastron (Bessell year)
39- 43 F5.3 yr e_T [0.007/1.6]? Uncertainty in T
45- 50 F6.4 --- e [0.17/0.5] Orbital eccentricity
52- 57 F6.4 --- e_e [0.001/0.02]? Uncertainty in e
59- 64 F6.4 arcsec a [0.1/1.7] Semi-major axis of the orbit
66- 71 F6.4 arcsec e_a [0.0006/0.004]? Uncertainty in a
73- 78 F6.2 deg Omega [183.7/301.3] Position angle of the node
(ΩA) (1)
80- 83 F4.2 deg e_Omega [0.2/0.5]? Uncertainty in Omega
85- 90 F6.2 deg omega [175.5/326.4] Longitude of periastron
(ωA) (1)
92- 96 F5.2 deg e_omega [0.59/17.6]? Uncertainty in omega
98-102 F5.2 deg i [36/89] Inclination
104-107 F4.2 deg e_i [0.4/0.72]? Uncertainty in i
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Note (1): The combined orbit of HIP12780 Aa,Ab is featured in both tables 3 and
4, duplicating the overlapping elements. In the combined orbit, the
longitude of periastron ωA corresponds to the primary, and the
position angle of the visual orbit ΩA is chosen accordingly to
describe the motion of the secondary.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- HIP [9642/64478] Hipparcos number
7- 13 A7 --- Syst System identifier
15- 24 F10.4 d JD [44646.5/57333.7] Julian Date (JD-2400000)
26- 32 F7.3 km/s RV1 [-70/100.2]? Radial Velocity of primary component
34- 39 F6.3 km/s e_RV1 [0.05/20]? Uncertainty in RV1 used for relative
weighting (σ1) (1)
41- 47 F7.3 km/s O-C1 [-10.4/15.9]? (O-C) residual for primary component
49- 55 F7.3 km/s RV2 [-70/100.5]? Radial Velocity of secondary component
57- 62 F6.3 km/s e_RV2 [0.05/20]? Uncertainty in RV2 used for
relative weighting (σ2) (1)
64- 69 F6.3 km/s O-C2 [-1.8/4.8]? (O-C) residual for secondary component
71 A1 --- Ref Data reference (2)
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Note (1): Unrealistically large errors are assigned to radial velocities
corresponding to blended Cross-Correlation Functions (CCFs).
Note (2): Data source defined as follows:
C = CHIRON fiber-fed echelle spectrograph on the Cerro Tololo Interamerican
Observatory (CTIO; Chile) 1.5m telescope;
F = Fiber Echelle (FECH) on the CTIO 1.5m;
S = Saar et al. (1990A&A...235..291S 1990A&A...235..291S);
H = High Accuracy Radial velocity Planet Searcher (HARPS) at the ESO;
Lagrange et al. (2009A&A...495..335L 2009A&A...495..335L);
L = Tokovinin et al. 2015 (Cat. J/AJ/149/8).
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- HIP [9642/64478] Hipparcos number
7- 11 A5 --- Syst System identifier
13- 21 F9.4 yr Year [1932.9/2016] Besselian year
23- 27 F5.1 deg PA [96/339.2] Position angle θ
29- 34 F6.4 arcsec Sep [0.05/1.5] Separation ρ
36- 41 F6.4 arcsec e_Sep [0.002/1.1] Positional error σρ
43- 47 F5.1 deg (O-C)PA [-30.1/34.9] (O-C) residual in position angle
(O-C)θ
49- 55 F7.4 arcsec (O-C)Sep [-0.26/0.033] (O-C) residual in separation
(O-C)ρ
57- 60 A4 --- Ref Data reference (Fin, HIP, SOAR, Spe, Vis) (1)
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Note (1): Data source defined as follows:
Fin = Ocular interferometry by W. S. Finsen;
HIP = Hipparcos;
SOAR = Speckle interferometry at the SOuthern Astrophysical Research (SOAR)
telescope;
Spe = Speckle interferometry at other telescopes;
Vis = Visual micrometer measures.
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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 III. 2018AJ....156...48T 2018AJ....156...48T, Cat. J/AJ/156/48
Tokovinin et al. Paper IV. 2018AJ....156..194T 2018AJ....156..194T, Cat. J/AJ/156/194
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]; Sylvain Guehenneux [CDS] 12-Sep-2016