J/AJ/156/48 Orbits of subsystems in six multiple stars. III. (Tokovinin, 2018)
Spectroscopic orbits of subsystems in multiple stars. III.
Tokovinin A.
<Astron. J., 156, 48 (2018)>
=2018AJ....156...48T 2018AJ....156...48T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Spectral types ; Proper motions ;
Parallaxes, trigonometric ; Spectroscopy ; Radial velocities
Keywords: binaries: general - binaries: spectroscopic
Abstract:
Spectroscopic orbits are computed for inner pairs in six nearby
hierarchical multiple systems (HIP 35733, 95106/95110, 105441,
105585/105569, 105947, and 109951). Radial velocities and resolved
measurements, when available, are used to derive combined sets of
outer orbital elements for three systems. Each multiple system is
discussed individually. Additionally, HIP 115087 is a simple 7.9-day
single-lined binary. Although the minimum companion mass is substellar
(in the brown dwarf desert regime), it appears to be a 0.2 solar-mass
star in a low-inclination orbit.
Description:
Most 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. The observing time was allocated through NOAO.
Observations were made with the CHIRON 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. Most spectra are taken in the slicer mode with a resolution of
R=80000 and a signal to noise ratio of at least 20.
In 2017 September, the new NRES fiber-fed echelle spectrograph installed
at the 1 m telescope of the Las Cumbres Observatory, located at CTIO,
became available for users (Siverd et al. 2016SPIE.9908E..6XS). It has
a spectral resolution of R=53000. I obtained useful data from NRES,
extending the time coverage available with CHIRON.
For some objects, I also use RVs measured in 2008 with the Du Pont
echelle at Las Campanas and in 2010 with the Fiber Echelle (FECH) at CTIO,
published in (Tokovinin et al. 2015, J/AJ/149/8).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 38 9 List of stars
table1.dat 60 11 Basic parameters of observed multiple systems
table2.dat 121 9 Spectroscopic orbits
table3.dat 95 3 Visual orbits
table4.dat 44 142 Radial velocities and residuals
table5.dat 27 14 Radial velocities of visual components
table6.dat 54 51 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)
B/sb9 : SB9: 9th Catalogue of Spectroscopic Binary Orbits
(Pourbaix+ 2004-2014)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/AJ/124/1144 : Orbits of 171 single-lined spectroscopic binaries
(Latham, 2002)
J/other/AstBu/62.339 : Speckle interferometry of nearby multiples
(Balega+, 2007)
J/A+A/563/A138 : Spectroscopy of spectroscopic binaries
(Veramendi+, 2014)
J/AJ/149/8 : Radial velocity of southern visual multiple stars
(Tokovinin+, 2015)
J/AJ/150/50 : Speckle interferometry at SOAR in 2014
(Tokovinin+, 2015)
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/155/235 : Speckle interferometry at SOAR in 2016 and 2017
(Tokovinin+, 2018)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP [35733/115087] Hipparcos number (Cat. I/239)
8- 9 I2 h RAh Simbad Hour of Right Ascension (J2000)
11- 12 I2 min RAm Simbad Minute of Right Ascension (J2000)
14- 18 F5.2 s RAs Simbad Second of Right Ascension (J2000)
20 A1 --- DE- Simbad Sign of the Declination (J2000)
21- 22 I2 deg DEd Simbad Degree of Declination (J2000)
24- 25 I2 arcmin DEm Simbad Arcminute of Declination (J2000)
27- 30 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000)
32- 34 A3 --- VP4 Indicates RV data in Table 4
36- 38 A3 --- VP5 Indicates RV data in Table 5
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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 component(s)
15- 20 I6 --- HIP [35733/115087] Hipparcos number (Cat. I/239)
22- 27 I6 --- HD [58038/219709]? Henry Draper number (Cat. III/135)
29- 34 A6 --- SpT MK spectral type
36- 40 F5.2 mag Vmag [7.01/10.6] V-band magnitude
42- 45 F4.2 mag V-K [1.14/3.59] V-K color index
47- 49 I3 mas/yr pmRA [-45/214] Proper motion in right ascension
direction (pmRA*cosDE) (1)
51- 54 I4 mas/yr pmDE [-321/98] Proper motion in declination direction
(1)
56- 60 F5.2 mas plx [13.99/31.71]? Parallax (1)
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Note (1): Proper motions and parallax from Gaia DR2 (Cat. I/345).
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [35733/115087] Hipparcos number (Cat. I/239)
8- 12 A5 --- Comp System components
14- 24 F11.5 d Per [4.6237/87658] Orbital period (G1)
26- 35 F10.5 d e_Per [1e-05/1576]? Uncertainty in Per (G1)
37- 46 F10.4 d T [47849/58026.5495] Time of periastron passage,
in Julian Date (JD-2400000)
48- 55 F8.4 d e_T [0.0069/168] Uncertainty in T
57- 61 F5.3 --- e [0/0.714] Orbital eccentricity (G1)
63- 67 F5.3 --- e_e [0.001/0.078]? Uncertainty in e (G1)
69- 73 F5.1 deg omega [0/330.2] Longitude of periastron for the primary
component ωA (G1)
75- 77 F3.1 deg e_omega [0.5/9.7]? Uncertainty in omega (G1)
79- 83 F5.2 km/s K1 [1.71/42.49]? Radial velocity amplitude of
the primary component
85- 88 F4.2 km/s e_K1 [0.06/1.72]? Uncertainty in K1
90- 94 F5.2 km/s K2 [4.52/43.91]? Radial velocity amplitude of
the secondary component
96- 99 F4.2 km/s e_K2 [0.09/0.2]? Uncertainty in K2
101-106 F6.2 km/s gamma [-23.04/27.76] Center-of-mass velocity γ
(G1)
108-111 F4.2 km/s e_gamma [0.04/0.46]? Uncertainty in gamma (G1)
113-116 F4.2 km/s rms1 [0.02/0.53]? Weighted rms residual for first
component
118-121 F4.2 km/s rms2 [0.04/0.14]? Weighted rms residual for second
component
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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 --- HIP [105585/109951] Hipparcos number (Cat. I/239)
8- 10 A3 --- Comp System components
12- 18 F7.3 yr Per [20.744/240] Orbital period (G1)
20- 24 F5.3 yr e_Per [0.037/4.32]? Uncertainty for Per (G1)
26- 33 F8.3 yr T [1989.88/2015.656] Time of periastron
(Bessell year)
35- 39 F5.3 yr e_T [0.027/0.46] Uncertainty in T
41- 45 F5.3 --- e [0.363/0.714] Orbital eccentricity
47- 51 F5.3 --- e_e [0.003/0.044] Uncertainty in e
53- 58 F6.4 arcsec a [0.1675/0.695] Semi-major axis of the orbit
60- 65 F6.4 arcsec e_a [0.0005/0.045] Uncertainty in a
67- 71 F5.1 deg Omega [262/335.1] Position angle of the node ΩA
73- 75 F3.1 deg e_Omega [0.5/3] Uncertainty in Omega
77- 81 F5.1 deg omega [45.2/324.4] Longitude of periastron ωA
83- 85 F3.1 deg e_omega [0.7/9.6] Uncertainty in omega
87- 90 F4.1 deg i [17.7/88.4] Inclination
92- 95 F4.1 deg e_i [0.3/13.6] Uncertainty in i
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [35733/115087] Hipparcos number (Cat. I/239)
8- 12 A5 --- Comp System components
14- 22 F9.3 d JD [46988.867/58195.913] Julian Date (JD-2400000)
24- 29 F6.2 km/s RV [-34.48/72.28] Radial velocity
31- 34 F4.2 km/s e_RV [0.03/1.5] Uncertainty in RV
36- 40 F5.2 km/s (O-C) [-2.48/1.98] (O-C) residual to orbit
42 A1 --- Label [a/b] Component label (a=primary, b=secondary)
44 A1 --- Ref Data source (G2)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [35733/115087] Hipparcos number (Cat. I/239)
8 A1 --- Comp System component
10- 19 F10.4 d JD [54782.8161/58195.4934] Julian Date (JD-2400000)
21- 25 F5.2 km/s RV [3.58/28.06] Radial velocity
27 A1 --- Ref Data source (G2)
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [105585/109951] Hipparcos number (Cat. I/239)
8- 10 A3 --- Comp System components
12- 20 F9.4 yr Year [1900/2017.6823] Besselian year
22- 26 F5.1 deg theta [39.2/357.6] Position angle θ
28- 33 F6.4 arcsec rho [0.0726/1.1] Separation ρ
35- 39 F5.3 arcsec ePos [0.001/1.05] Positional error
41- 45 F5.1 deg (O-C)t [-17.5/1.6] (O-C) in position angle
47- 52 F6.3 arcsec (O-C)r [-0.048/0.042] (O-C) in separation
54 A1 --- Ref Data source (1)
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Note (1): Data source as follows:
H = Hipparcos;
S = Speckle interferometry at SOAR;
s = Speckle interferometry at other telescopes;
M = Visual micrometer measures.
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Global notes:
Note (G1): When no uncertainty is given for Per, e, ωA, and γ,
these parameters are fixed.
Note (G2): Data source as follows:
C = CHIRON fiber-fed echelle spectrograph on the CTIO 1.5m;
D = Du Pont echelle (2015, J/AJ/149/8);
F = Fiber Echelle (FECH) on the CTIO 1.5m (2015, J/AJ/149/8);
L = Latham et al. (2002, J/AJ/124/1144);
N = Network of Robotic Telescopes Echelle Spectrographs (NRES).
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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 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], Tiphaine Pouvreau [CDS] 24-Jan-2019