J/AJ/159/290 RVs of 12 spectroscopic binaries M-dwarfs (Winters+, 2020)
Spectroscopic orbits of 11 nearby, mid-to-late M-dwarf binaries.
Winters J.G., Irwin J.M., Charbonneau D., Latham D.W., Medina A.M., Mink J.,
Esquerdo G.A., Berlind P., Calkins M.L., Berta-Thompson Z.K.
<Astron. J., 159, 290 (2020)>
=2020AJ....159..290W 2020AJ....159..290W
ADC_Keywords: Binaries, spectroscopic; Stars, M-type; Stars, dwarfs;
Radial velocities; Proper motions; Parallaxes, trigonometric;
Spectra, optical
Keywords: Spectroscopic binary stars ; Solar neighborhood ; M dwarf stars ;
White dwarf stars ; Orbital elements ; Substellar companion stars
Abstract:
We present the spectroscopic orbits of 11 nearby, mid-to-late M dwarf
binary systems in a variety of configurations: 2 single-lined binaries
(SB1s), 7 double-lined binaries (SB2s), 1 double-lined triple (ST2),
and 1 triple-lined triple (ST3). Eight of these orbits are the first
published for these systems, while five are newly identified
multiples. We obtained multi-epoch, high-resolution spectra with the
TRES instrument on the 1.5m Tillinghast Reflector at the Fred Lawrence
Whipple Observatory located on Mt. Hopkins in AZ. Using the TiO
molecular bands at 7065-7165Å, we calculated radial velocities for
these systems, from which we derived their orbits. We find LHS 1817 to
have in a 7hr period a companion that is likely a white dwarf, due to
the ellipsoidal modulation we see in our MEarth-North light-curve
data. We find G123-45 and LTT11586 to host companions with minimum
masses of 41MJup and 44MJup with orbital periods of 35 and 15days,
respectively. We find 2MA0930+0227 to have a rapidly rotating stellar
companion in a 917 day orbital period. GJ268, GJ1029, LP734-34,
GJ1182, G258-17, and LTT7077are SB2s with stellar companions with
orbital periods of 10, 96, 34, 154, 5, and 84days; LP655-43 is an ST3
with one companion in an 18day orbital period and an outer component
in a longer undetermined period. In addition, we present radial
velocities for both components of L870-44AB and for the outer
components of LTT11586 and LP655-43.
Description:
We observed each object between UT-2016-October-14 and 2020-January-8
using Tillinghast Reflector Echelle Spectrograph (TRES) on the 1.5m
Fred Lawrence Whipple Observatory (FLWO) on Mt. Hopkins, AZ. TRES is a
high-throughput, cross-dispersed, fiber-fed, echelle spectrograph. We
used the medium fiber (2.3" diameter) for a resolving power of
R∼44000. The spectral resolution of the instrumental profile is
6.7km/s at the center of all echelle orders. Exposure times ranged
from 120s to 3x1200s under good conditions, achieving a
signal-to-noise ratio of 3-25 per pixel at 7150Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 102 12 Astrometric Data For multiple systems
table3.dat 72 200 Radial velocities for multiple systems
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See also:
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/AJ/124/1144 : Orbits of 171 single-lined spectro. binaries (Latham, 2002)
J/ApJS/141/503 : Radial Velocities for 889 late-type stars (Nidever+, 2002)
J/AJ/123/2822 : Photometry of southern NLTT stars (Reid+, 2002)
J/ApJ/704/975 : Rotational velocities for M dwarfs (Jenkins+, 2009)
J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/ApJ/742/123 : Photometry and Velocity of LSPM J1112+7626 (Irwin+, 2011)
J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)
J/A+A/546/A14 : Limb-darkening for CoRoT, Kepler, Spitzer (Claret+, 2012)
J/ApJ/758/56 : Young M dwarfs within 25pc. II. Kinematics (Shkolnik+, 2012)
J/MNRAS/429/859 : New companions to nearby low-mass stars (Jodar+, 2013)
J/ApJ/784/156 : Plxs for 1507 nearby mid-to-late M dwarfs (Dittmann+, 2014)
J/ApJ/788/81 : BANYAN III. RVel and rotation of low-mass stars (Malo+,2014)
J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)
J/AJ/147/87 : From binaries to multiples. II. (Tokovinin, 2014)
J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/MNRAS/449/2618 : M-dwarfs in Multiples (MinMs) survey. I. (Ward-Duong+, 2015)
J/AJ/149/5 : Solar neighborhood. XXXV. Distances M dwarfs (Winters+,2015)
J/AJ/152/141 : Solar neighborhood. XXXVII. RVs M dwarfs (Benedict+, 2016)
J/MNRAS/462/2295 : 25 parsec local white dwarf population (Holberg+, 2016)
J/ApJ/821/93 : Rotation & Galactic kinematics mid M dwarfs (Newton+, 2016)
J/A+A/597/A47 : CARMENES input cat. of M dwarfs II (Cortes-Contreras+, 2017)
J/AJ/154/32 : Solar neighborhood. XXXIX. White dwarfs (Subasavage+, 2017)
J/AJ/153/14 : Solar neighborhood XXXVIII. Nearby M dwarf (Winters+, 2017)
J/A+A/619/A32 : CARMENES SB2 orbital parameters (Baroch+, 2018)
J/A+A/614/A76 : CARMENES input catalogue of M dwarfs. III. (Jeffers+, 2018)
J/AJ/155/225 : M dwarf stars rotational broadening measur. (Kesseli+, 2018)
J/AJ/156/217 : Stellar prop. for M dwarfs in MEarth-South (Newton+, 2018)
J/A+A/612/A49 : 324 CARMENES M dwarfs velocities (Reiners+, 2018)
J/AJ/156/259 : Robo-AO detected close binaries in Gaia DR2 (Ziegler+, 2018)
J/AJ/157/216 : Stellar multipl. rate M dwarfs within 25pc (Winters+, 2019)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID System identification
17- 32 A16 --- 2MASS 2MASS identification (2MASS JHHMMSSss+DDMMSSsA)
34- 35 I2 h RAh [1/17] Hour of right ascension (J2000)
37- 38 I2 min RAm Minute of right ascension (J2000)
40- 43 F4.1 s RAs Second of right ascension (J2000)
45 A1 --- DE- [-+] Sign of declination (J2000)
46- 47 I2 deg DEd Degree of declination (J2000)
49- 50 I2 arcmin DEm Arcminute of declination (J2000)
52- 53 I2 arcsec DEs Arcsecond of declination (J2000)
55- 62 F8.3 mas/yr pmRA [-745/1915] Proper motion in right ascension
(µRA)
64- 71 F8.3 mas/yr pmDE [-945/302] Proper motion in declination
(µDE)
73- 78 F6.2 mas plx [68/164] Parallaxe (πinit)
80- 84 F5.2 mas e_plx [1.7/11.7] Error on plx
86 A1 --- f_plx A * indicates that the listed "parallax" is a
photometric distance estimate
88- 90 A3 --- r_plx Reference used (1)
92- 97 F6.2 mas plxGaia [27/165] Gaia DR2 parallax (πDR2)
99-102 F4.2 mas e_plxGaia [0.05/1.1] error on plxGaia
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Note (1): References as follows:
1 = Dittmann+, 2014, J/ApJ/784/156
2 = Finch+, 2018, I/344
3 = van Altena+, 1995yCat.1174....0V 1995yCat.1174....0V
4 = van Leeuwen, 2007, I/311
5 = Winters+, 2015, J/AJ/149/5
6 = Winters+, 2017, J/AJ/153/14
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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- 14 A14 --- ID Source identifier
16- 27 F12.4 d BJD [2457676/2458857] Barycentric Julian Date (1)
29- 36 F8.3 km/s A-RVel [-116/125] Primary Barycentric radial velocity (2)
38- 42 F5.3 km/s e_A-RVel [0.04/2]? Uncertainty in A-RVel
44- 50 F7.3 km/s B-RVel [-50/91]? Secondary Barycentric radial velocity (2)
52- 56 F5.3 km/s e_B-RVel [0.05/2.4]? Uncertainty in B-RVel
58- 63 F6.3 km/s C-RVel [21.5/24.8]? Teriary Barycentric radial velocity (2)
65- 72 F8.6 --- h [0.375/0.958] Peak normalized cross-correlation
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Note (1): Of mid-exposure, in the TDB time-system.
Note (2): The internal model-dependent uncertainties on each listed velocity
are σ/h, where σ is listed in Table5 and h is the
peak-normalized cross-correlation for each spectrum listed here.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 14-Sep-2020