J/AJ/152/11 Orbits of four triple stars (Tokovinin, 2016)
Orbits of four young triple-lined multiple systems.
Tokovinin A.
<Astron. J., 152, 11 (2016)>
=2016AJ....152...11T 2016AJ....152...11T (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Stars, nearby ; Stars, dwarfs ;
X-ray sources ; Radial velocities ; Interferometry
Keywords: binaries: general - binaries: spectroscopic - stars: solar-type
Abstract:
Each of the nearby triple systems HIP 7601, 13498, 23824, and 113597
(HD 10800, 18198, 35877, 217379) consist of solar-type dwarfs with
comparable masses, where all three components are resolved spectrally,
while the outer pairs are resolved both visually and spectrally. These
stars are relatively young (between 100 and 600Myr) and
chromospherically active (X-ray sources), although they rotate slowly.
I determine the spectroscopic orbits of the inner subsystems (periods
19.4, 14.1, 5.6, 20.3days) and the orbits of the outer systems
(periods 1.75, 51, 27, 500years, respectively). For HIP 7601 and
13498, the combined spectro-interferometric outer orbits produce
direct measurement of the masses of all of the components, allowing
for a comparison with stellar models. The 6708Å lithium line is
present and its strength is measured in each component individually by
subtracting the contributions of the other components. The inner and
outer orbits of HIP 7601 are nearly circular, likely co-planar, and
have a modest period ratio of 1:33. This study contributes to the
characterization of hierarchical multiplicity in the solar
neighborhood and provides data for testing stellar evolutionary models
and chronology.
Description:
Most spectra used here were taken with the 1.5m telescope located at
the Cerro Tololo Interamerican Observatory in Chile, which is 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 fiber-fed echelle spectrograph CHIRON
(http://www.ctio.noao.edu/noao/content/chiron) by the telescope
operators in service mode. The spectra taken in the slicer mode have a
resolution of R=80000 and a signal-to-noise ratio (S/N) of at least
20. They cover the range from 415 to 880nm in 53 orders.
Thorium-argon calibrations were recorded for each target. A few
spectra taken in 2010 at the same telescope with the Fiber Echelle
(FECH) with a resolution of R=44000 are also used here.
Information on the resolved outer subsystems has been retrieved from
the Washington Double Star Catalog (WDS; Cat. B/wds). It is
complemented by recent speckle interferometry from the SOuthern
Astrophysical Research (SOAR) telescope. The latest publication
(Tokovinin et al. 2015, Cat. J/AJ/150/50) contains references to the
previous papers of this series. Observations made in 2015 and 2016 are
not yet published.
In the ESO archive, I found 11 spectra of HIP7601 taken with HARPS in
the period from 2009 to 2012 (program 088C.513 and its continuation).
The spectral resolution is very similar to that of CHIRON: R=80000.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 62 5 Basic parameters of multiple systems
table2.dat 130 7 Spectroscopic orbits
table3.dat 113 4 Visual orbits
table4.dat 67 108 Radial velocities and residuals
table5.dat 58 56 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/150/50 : Speckle interferometry at SOAR in 2014 (Tokovinin+, 2015)
J/AJ/149/195 : Spectroscopy of the quadruple system HD91962 (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/147/86 : From binaries to multiples. I. FG-67 sample (Tokovinin, 2014)
J/A+A/568/A26 : SACY. V. Multiple systems (Elliott+, 2014)
J/AJ/143/42 : Speckle interferometry with SOAR in 2010-2011 (Hartkopf+, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [7601/113597] Hipparcos number (from Cat. I/239)
8- 13 I6 --- HD [10800/217379] Henry Draper number (Cat. III/135)
15- 24 A10 --- WDS WDS identification (from Cat. B/wds)
26- 31 A6 --- SpT Spectral type
33- 36 F4.2 mag Vmag [5.87/9.65] The V-band magnitude
38- 41 F4.2 mag B-V [0.57/1.34] The B-V color index
43- 46 I4 mas/yr pmRA [7/122] Proper motion in Right Ascension
(µα) (1)
48- 51 I4 mas/yr pmDE [-157/147] Proper motion in Declination
(µδ) (1)
53- 57 F5.2 mas plx [14/36.6] Parallax (1)
59- 62 F4.2 mas e_plx [0.28/2.1] Error in plx (1)
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Note (1): From HIP2 (van Leeuwen 2007, Cat. I/311).
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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 [7601/113597] Hipparcos number
8- 13 I6 --- HD [10800/217379] Henry Draper number
15- 19 A5 --- Syst System identifier
21- 31 F11.5 d Per [5/18794] Orbital period (P)
33- 41 F9.5 d e_Per [0/301] Uncertainty in Per
43- 51 F9.3 d T [54190/57372.7] Time of periastron passage, in
Julian Date (JD-2400000)
53- 57 F5.3 d e_T [0.003/9] Uncertainty in T
59- 64 F6.4 --- e [0/0.78] Orbital eccentricity
66- 71 F6.4 --- e_e [0.0009/0.013]? Uncertainty in e (1)
73- 77 F5.1 deg omega [0/242.8] Longitude of periastron of the first
component (ωA)
79- 81 F3.1 deg e_omega [0.3/1.8]? Uncertainty in omega (1)
83- 87 F5.2 km/s K1 [3.98/54.72] Radial velocity amplitude of the
first component
89- 92 F4.2 km/s e_K1 [0.03/0.61] Uncertainty in K1
94- 98 F5.2 km/s K2 [9.9/61.65]? Radial velocity amplitude of the
second component
100-103 F4.2 km/s e_K2 [0.05/0.7]? Uncertainty in K2
105-109 F5.2 km/s gamma [-1.65/18.61] Center-of-mass velocity γ
111-114 F4.2 km/s e_gamma [0.02/0.12]? Uncertainty in γ (1)
116-119 F4.2 km/s rms1 [0/0.55] Weighted rms residual to the
spectroscopic orbit for the first component
121-124 F4.2 km/s rms2 [0.03/0.49] Weighted rms residual to the
spectroscopic orbit for the second component
126-127 I2 --- N1 [9/19] Total number of radial velocities
for first component
129-130 I2 --- N2 [9/20] Total number of radial velocities
for second component
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Note (1): When no uncertainty is given for e, omega, and gamma these parameters
are fixed.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [7601/113597] Hipparcos number
8- 12 I5 --- HD [10800/35877]? Henry Draper number
14- 16 A3 --- Syst System identifier
18- 26 F9.5 yr Per [1.7/500] Orbital period (P)
28- 34 F7.5 yr e_Per [0.00047/0.82]? Uncertainty in Per
36- 43 F8.3 yr T [1843.2/2014.7] Time of periastron
(Bessell year)
45- 49 F5.3 yr e_T [0.003/0.14]? Uncertainty in T
51- 56 F6.4 --- e [0.19/0.78] Orbital eccentricity
58- 63 F6.4 --- e_e [0.0018/0.013]? Uncertainty in e
65- 71 F7.5 arcsec a [0.07/2.5] Semi-major axis of the orbit
73- 79 F7.5 arcsec e_a [0.0004/0.005]? Uncertainty in a
81- 85 F5.1 deg Omega [2.4/298.3] Position angle of the visual
orbit (ΩA) (1)
87- 89 F3.1 deg e_Omega [0.3/1.3]? Uncertainty in Omega
91- 95 F5.1 deg omega [16.2/151.2] Longitude of periastron
(ωA) (1)
97- 99 F3.1 deg e_omega [0.3/1.7]? Uncertainty in omega
101-105 F5.2 deg i [47.6/80.9] Inclination
107-110 F4.2 deg e_i [0.48/1.9]? Uncertainty in i
112-113 I2 --- N [11/17] Number of astrometric measures
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Note (1): The combined orbits are featured in both tables 2 and 3, duplicating
overlapping elements. In combined orbits, 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: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [7601/113597] Hipparcos identifier
8- 12 A5 --- Syst System identifier
14- 23 F10.4 d JD [51845.2/57402.6] Julian Date of observation
(JD-2400000)
25- 31 F7.3 km/s RV1 [-46.8/58.8]? Primary radial velocity (1)
33- 37 F5.3 km/s e_RV1 [0/9.9]? Uncertainty in RV1 used for relative
weighting
39- 44 F6.3 km/s O-C1 [-2.4/1.1]? Primary orbit (O-C) residual
46- 52 F7.3 km/s RV2 [-60/55.7]? Secondary radial velocity (1)
54- 58 F5.3 km/s e_RV2 [0/9.9]? Uncertainty in RV2 used for relative
weighting
60- 65 F6.3 km/s O-C2 [-3.86/0.85]? Secondary orbit (O-C) residual
67 A1 --- Ref Reference code (C, E, F, H, L, or W) (2)
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Note (1): For the inner subsystem of HIP7601, the velocities RV1 and RV2 are
relative to the center of mass VA (motion in the visual orbit is
subtracted). In the outer orbits, RV1 refers to the center of mass of the
subsystem. The radial velocities of the non-variable component HIP113597B
are also listed in this table.
Note (2): The codes for the data sources are defined as follows:
C = The fiber-fed echelle spectrograph CHIRON on the 1.5m telescope located
at the Cerro Tololo Interamerican Observatory (CTIO) in Chile;
E = Elliott et al. 2014 (Cat. J/A+A/568/A26);
F = Fiber Echelle (FECH) on the 1.5m telescope located at the Cerro Tololo
Interamerican Observatory in Chile;
H = High Accuracy Radial velocity Planet Searcher (HARPS) at the ESO;
L = Tokovinin et al. 2015 (Cat. J/AJ/149/8);
W = Wichman et al. (2003A&A...400..293W 2003A&A...400..293W).
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP [7601/113597] Hipparcos identifier
8- 10 A3 --- Syst System identifier
12- 20 F9.4 yr Year [1927/2016.2] Year of the observation
22- 26 F5.1 deg PA [0.1/359.6] Position angle between components
(θ)
28- 33 F6.4 arcsec Sep [0.037/2.3] Angular separation between
components (ρ)
35- 39 F5.3 arcsec e_Sep [0/9.5] Position error σ used for
weighting
41- 45 F5.1 deg (O-C)PA [-31.1/8.7] Position angle (O-C) residual
47- 53 F7.4 arcsec (O-C)Sep [-0.685/0.155] Separation (O-C) residual
55- 58 A4 --- Ref Reference code (Hip, SOAR, Spe, or Vis) (1)
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Note (1): The reference codes are defined as follows:
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 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 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] 13-Sep-2016