J/AJ/160/58 Orbits of spectro. binaries with CHARA Array. III. (Lester+, 2020)
Visual orbits of spectroscopic binaries with the CHARA Array.
III. HD 8374 and HD 24546.
Lester K.V., Fekel F.C., Muterspaugh M., Gies D.R., Schaefer G.H.,
Farrington C.D., Guo Z., Matson R.A., Monnier J.D., ten Brummelaar T.,
Sturmann J., Weiss S.A.
<Astron. J., 160, 58 (2020)>
=2020AJ....160...58L 2020AJ....160...58L
ADC_Keywords: Stars, double and multiple; Spectra, optical; Spectra, infrared;
Radial velocities; Positional data
Keywords: Spectroscopic binary stars ; Visual binary stars ;
Fundamental parameters of stars
Abstract:
We present the visual orbits of two long-period spectroscopic binary
stars, HD8374 and HD24546, using interferometric observations acquired
with the Center for High Angular Resolution Astronomy (CHARA) Array
and the Palomar Testbed Interferometer. We also obtained new radial
velocities from echelle spectra using the APO 3.5m and Fairborn 2.0
telescopes. By combining the visual and spectroscopic observations, we
solve for the full, three-dimensional orbits and determine the stellar
masses and distances to within 3% uncertainty. We then estimate the
effective temperature and radius of each component star through
Doppler tomography and spectral energy distribution analyses, in order
to compare the observed stellar parameters to the predictions of
stellar evolution models. For HD8374, we find masses of
M1=1.636±0.050M☉ and M2=1.587±0.049M☉, radii of
R1=1.84±0.05R☉ and R2=1.66±0.12R☉, temperatures of
Teff1=7280±110K and Teff-2-=7280±120K, and an estimated age
of 1.0Gyr. For HD24546, we find masses of M1=1.434±0.014M☉ and
M2=1.409±0.014M☉, radii of R1=1.67±0.06R☉ and
R2=1.60±0.10R☉, temperatures of Teff1=6790±120K and
Teff2=6770±90K, and an estimated age of 1.4Gyr. HD24546 is
therefore too old to be a member of the Hyades cluster, despite its
physical proximity to the group.
Description:
We observed HD8374 and HD24546 with the ARC echelle spectrograph
(ARCES) on the APO 3.5m telescope from 2015 to 2020. ARCES covers
3500-10500Å over 107 orders at an average resolving power of
R=30000.
We also acquired spectroscopic observations of HD8374 and HD24546 at
Fairborn Observatory in southeast Arizona with the Tennessee State
University 2.0m Automatic Spectroscopic Telescope (AST) and a
fiber-fed echelle spectrograph. Those spectra have 21 orders, cover a
wavelength region of 4920-7100Å, and have a resolving power of
35000 at 6000Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 43 Radial velocity measurements for HD8374
table2.dat 72 46 Radial velocity measurements for HD24546
table5.dat 64 24 Relative positions for HD8374
table6.dat 64 9 Relative positions for HD24546
table7.dat 132 2 Orbital parameters from VB+SB2 solution
table8.dat 127 2 Stellar parameters
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See also:
B/pastel : The PASTEL catalogue (Soubiran+, 2016-)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
I/347 : Distance to 1.33 billion stars Gaia DR2 (Bailer-Jones+,2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJS/99/135 : Rotation and Spectral Peculiarities (Abt+ 1995)
J/A+A/331/81 : Hyades membership (Perryman+ 1998)
J/A+AS/124/75 : Multiple star catalogue (MSC) (Tokovinin 1997-1999)
J/A+A/404/775 : Radial velocities of HD 41004A/B (Zucker+, 2003)
J/AJ/133/889 : Faint companions of Hipparcos stars (Lepine+, 2007)
J/ApJS/176/276 : PTI calibrator catalog (van Belle+, 2008)
J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)
J/AJ/145/111 : Radial velocities of 5 spectroscopic binaries (Fekel+, 2013)
J/AJ/152/213 : Interferometry & spectro. of sigma Orionis (Schaefer+, 2016)
J/AJ/153/212 : Obs. of binary stars at the WIYN telescope (Horch+, 2017)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/MNRAS/479/1332 : Binaries with F, G or K primaries & M dwarfs (Montes+, 2018)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 4 I4 yr Obs.Y UT year of observation
6- 8 A3 "month" Obs.M UT month of observation
10- 11 I2 d Obs.D UT day of observation
13- 22 F10.4 d HJD Heliocentric Julian Date, HJD-2400000
24- 27 F4.2 --- Porb Orbital phase
29- 34 F6.2 km/s RVel1 First component radial velocity
36- 39 F4.2 km/s e_RVel1 Error on RVel1
41- 45 F5.2 km/s O-C1 First component residual velocity
47- 52 F6.2 km/s RVel2 Second component radial velocity
54- 57 F4.2 km/s e_RVel2 Error on RVel2
59- 63 F5.2 km/s O-C2 Second component residual velocity
65- 72 A8 --- Tel Telescope used
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Byte-by-byte Description of file: table[56].dat
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Bytes Format Units Label Explanations
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1- 4 I4 yr Obs.Y UT year of observation
6- 8 A3 "month" Obs.M UT month of observation
10- 11 I2 d Obs.D UT day of observation
13- 22 F10.4 d HJD Heliocentric Julian Date, HJD-2400000
24- 27 F4.2 --- Porb Orbital phase
29- 33 F5.3 mas rho Angular distance (ρ)
35- 40 F6.2 deg theta Position angle (θ)
42- 46 F5.3 mas emaj Semi major axis of the error ellipse (σmaj)
48- 52 F5.3 min emin Semi minor axis of the error ellipse (σmin)
54- 59 F6.2 deg Phi Position angle of the error ellipse (Φ)
61- 64 F4.2 --- f2/f1 Flux ratio
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID System identification
10- 17 F8.5 d Per [30/36] Period
19- 25 F7.5 d e_Per [2e-05/5e-05] Error on Per
27- 35 F9.3 d HJD [54293/57341] Heliocentric Julian Date, HJD-2400000
37- 41 F5.3 d e_HJD [0.003/0.004] Error on HJD
43- 48 F6.4 --- e [0.642/0.648] Eccentricity
50- 55 F6.4 --- e_e [0.0005/0.0006] Error on e
57- 62 F6.2 deg omega [207/326] Argument of periastron (ω)
64- 67 F4.2 deg e_omega [0.1/0.2] Error on omega
69- 74 F6.2 deg i [56/141] Inclination
76- 79 F4.2 deg e_i [0.45] Error on i
81- 84 F4.2 mas a [5/7] Semi-major axis
86- 89 F4.2 mas e_a [0.02/0.06] Error on a
91- 95 F5.1 deg Omega [150/337] Ascending node (Ω)
97- 99 F3.1 deg e_Omega [0.1/0.3] Error on Omega
101-105 F5.2 km/s gamma [14.1/25.5] Systemic velocity (γ)
107-110 F4.2 km/s e_gamma [0.02/0.04] Error on gamma
112-116 F5.2 km/s K1 [39.2/52.3] Component 1 velocity amplitude
118-121 F4.2 km/s e_K1 [0.05/0.06] Error on K1
123-127 F5.2 km/s K2 [40.4/53.2] Component 2 velocity amplitude
129-132 F4.2 km/s e_K2 [0.05/0.06] Error on K2
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- ID System identification
10- 14 F5.3 Msun Mass1 [1.43/1.64] Component 1 mass
16- 20 F5.3 Msun e_Mass1 [0.01/0.05] Error on Mass1
22- 26 F5.3 Msun Mass2 [1.4/1.59] Component 2 mass
28- 32 F5.3 Msun e_Mass2 [0.01/0.05] Error on Mass2
34- 37 F4.2 Rsun Rad1 [1.67/1.84] Component 1 radius
39- 42 F4.2 Rsun e_Rad1 [0.05/0.06] Error on Rad1
44- 47 F4.2 Rsun Rad2 [1.6/1.7] Component 2 radius
49- 52 F4.2 Rsun e_Rad2 [0.1/0.2] Error on Rad2
54- 57 I4 K Teff1 [6790/7280] Component 1 effective temperature
59- 61 I3 K e_Teff1 [110/120] Error on Teff1
63- 66 I4 K Teff2 [6770/7280] Component 2 effective temperature
68- 70 I3 K e_Teff2 [90/120] Error on Teff2
72- 75 F4.2 [cm/s2] logg1 [4.15/4.16] Component 1 surface gravity
77- 80 F4.2 [cm/s2] e_logg1 [0.02] Error on logg1
82- 85 F4.2 [cm/s2] logg2 [4.18/4.22] Component 2 surface gravity
87- 90 F4.2 [cm/s2] e_logg2 [0.03] Error on logg2
92- 95 F4.1 km/s vsini1 [14.1/15.9] Component 1 rotational velocity
97- 99 F3.1 km/s e_vsini1 [0.9/1.3] Error on vsini1
101-104 F4.1 km/s vsini2 [10.6/15.2] Component 2 rotational velocity
106-108 F3.1 km/s e_vsini2 [0.7/1.4] Error on vsini2
110-113 F4.1 pc Dist [38.7/61.7] Distance
115-117 F3.1 pc e_Dist [0.2/0.7] Error on Dist
119-122 F4.2 mag E(B-V) [0.04/0.07] Color excess
124-127 F4.2 mag e_E(B-V) [0.01/0.02] Error on E(B-V)
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History:
From electronic version of the journal
References:
Lester et al. Paper I: 2019AJ....157..140L 2019AJ....157..140L
Lester et al. Paper II: 2019AJ....158..218L 2019AJ....158..218L
(End) Prepared by Coralie Fix [CDS], 10-Dec-2020