J/AJ/159/257 Hawaii IR parallax program. IV. L0-T8 BDs with UKIRT (Best+, 2020)
The Hawaii infrared parallax program.
IV. A comprehensive parallax survey of L0-T8 dwarfs with UKIRT.
Best W.M.J., Liu M.C., Magnier E.A., Dupuy T.J.
<Astron. J., 159, 257 (2020)>
=2020AJ....159..257B 2020AJ....159..257B
ADC_Keywords: Stars, brown dwarf; Proper motions; Parallaxes, trigonometric;
Photometry, infrared; Surveys
Keywords: Late-type dwarf stars ; Parallax ; Proper motions ;
Infrared photometry ; Trigonometric parallax ; L dwarfs ; T dwarfs
Abstract:
We present parallaxes, proper motions, and J-band photometry for 348 L
and T dwarfs measured using the wide-field near-infrared camera
(WFCAM) on the United Kingdom Infrared Telescope (UKIRT). This is the
largest single batch of infrared parallaxes for brown dwarfs to date.
Our parallaxes have a median uncertainty of 3.5mas, similar to most
previous ground-based infrared parallax surveys. Our target list was
designed to complete a volume-limited parallax sample of L0-T8 dwarfs
out to 25pc spanning declinations -30° to +60° (68% of the
sky). We report the first parallaxes for 165 objects, and we improve
on previous measurements for another 53 objects. Our targets include
104 objects (mostly early-L dwarfs) having Gaia DR2 parallax
measurements with which our parallaxes are consistent. We include an
extensive comparison of previous literature parallaxes for L and T
dwarfs with both our results and Gaia DR2 measurements, identifying
systematic offsets for some previous surveys. Our parallaxes confirm
that 14 objects previously identified as wide common proper motion
companions to main-sequence stars have distances consistent with
companionship. We also report new JMKO photometry for our targets,
including the first measurements for 193 of our targets and
improvements over previously published JMKO photometry for another
60 targets. Altogether, our parallaxes will enable the first
population studies using a volume-limited sample spanning spectral
types L0-T8 defined entirely by parallaxes.
Description:
We used the near-infrared Wide Field Camera (WFCAM) on United Kingdom
Infrared Telescope (UKIRT). WFCAM consists of four 2048x2048 Rockwell
Hawaii-II (HgCdTe) infrared arrays, each with a field of view of
13.65'x13.65', arranged in a 2x2 grid and spaced by 12.83'. WFCAM has
a pixel scale of 0.4"/pixel. The observations presented in this paper
span 2014-May-5-UT through 2018-January-16-UT. Details of our
observations are given in Table1.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 133 356 Observations
table4.dat 144 348 UKIRT/WFCAM parallaxes and proper motions
table5.dat 68 19 *Objects with discrepant parallaxes
table6.dat 82 4 Updates to young moving group membership status
table7.dat 181 14 Updates to common proper motion companion status
refs.dat 58 84 References used for table 1
--------------------------------------------------------------------------------
Note on table5.dat: Including all objects with literature and UKIRT
parallax measurements that differ by at least 2σ or 10mas
-------------------------------------------------------------------------------
See also:
III/198 : Palomar/MSU nearby star spectro. survey (Hawley+, 1997)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/564/421 : Spectra of T dwarfs. I. (Burgasser+, 2002)
J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)
J/AJ/126/1526 : IR photometry of ultracool dwarfs (Bouy+, 2003)
J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/AJ/125/3302 : HST binary very low mass stars and brown dwarfs (Gizis+, 2003)
J/AJ/126/2048 : NStars project: the Northern Sample. I. (Gray+, 2003)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)
J/AJ/127/3553 : JHK photo. and spectroscopy for L and T dwarfs (Knapp+, 2004)
J/other/ARA+A/42.685 : Young stars near the Sun (Zuckerman+, 2004)
J/A+A/435/363 : Southern Infrared Proper Motion Survey (Deacon+, 2005)
J/ApJ/637/1067 : Near-IR spectral classification of T dwarfs (Burgasser+, 2006)
J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006)
J/AJ/132/161 : NStars project: The southern sample. I. (Gray+, 2006)
J/AJ/132/891 : Binaries among nearby L dwarfs (Reid+, 2006)
J/MNRAS/374/664 : Stellar atmospheric param. in MILES library (Cenarro+, 2007)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/AJ/134/1162 : 11 new T dwarfs in 2MASS (Looper+, 2007)
J/ApJ/689/1295 : Lithium test implications for brown dwarfs (Kirkpatrick+,2008)
J/ApJ/676/1281 : L and T dwarfs in 2MASS/SDSS (Metchev+, 2008)
J/MNRAS/383/831 : New DENIS nearby L and late-M dwarfs (Phan-Bao+, 2008)
J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)
J/A+A/493/L27 : Parallaxes of 10 ultracool subdwarfs (Schilbach+, 2009)
J/ApJ/710/1142 : SpeX spectroscopy of low mass binaries. I. (Burgasser+, 2010)
J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/AJ/142/77 : New T dwarfs identified in Pan-STARRS 1 (Deacon+, 2011)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)
J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)
J/ApJ/752/56 : BDKP. III. Parallaxes for 70 ultracool dwarfs (Faherty+, 2012)
J/MNRAS/427/3280 : Ultra-cool dwarfs at low Galactic latitudes (Folkes+, 2012)
J/ApJ/754/44 : The AstraLux Large M-dwarf Survey (Janson+ 2012)
J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)
J/MNRAS/433/457 : 76 T dwarfs from the UKIDSS LAS (Burningham+, 2013)
J/MNRAS/430/1171 : Sub-stellar birth rate from UKIDSS (Day-Jones+, 2013)
J/ApJS/205/6 : T dwarf population revealed by WISE (Mace+, 2013)
J/ApJ/762/88 : Young stellar kinematic group candidate members (Malo+, 2013)
J/A+A/556/A133 : Astrometric orbit of DENIS-P J082303.1-49120 (Sahlmann+, 2013)
J/PASP/125/809 : New nearby M, L, and T dwarfs (Thompson+, 2013)
J/ApJ/794/143 : New SpeX Observations of M7-L6 Dwarfs (Bardalez+, 2014)
J/ApJ/792/119 : Companions to nearby stars from Pan-STARRS 1 (Deacon+, 2014)
J/ApJ/784/156 : Parallaxes 1507 nearby mid-to-late M dwarfs (Dittmann+, 2014)
J/ApJ/783/121 : BANYAN II. Nearby young assoc. candidate members (Gagne+,2014)
J/ApJ/789/102 : Properties of late M-dwarfs (Janson+, 2014)
J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)
J/ApJ/787/126 : WISE reduced proper motions and spectral types (Luhman+, 2014)
J/MNRAS/443/2327 : New proper motion objects from UKIDSS GPS (Smith+, 2014)
J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)
J/ApJ/814/118 : L/T transition dwarfs search with PS1 & WISE. II. (Best+,2015)
J/ApJS/219/33 : BANYAN. VII. Candidate YMG members from BASS (Gagne+, 2015)
J/MNRAS/449/3651 : L and T dwarfs from UKIDSS LAS (Marocco+, 2015)
J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)
J/ApJS/224/36 : The AllWISE motion survey (AllWISE2) (Kirkpatrick+, 2016)
J/ApJ/833/96 : Hawaii IR parallax program. II. Ultracool dwarfs (Liu+, 2016)
J/ApJ/817/112 : NEOWISE/AllWISE high proper motion objects (Schneider+, 2016)
J/AJ/152/24 : Trigo. parallaxes of 134 low-mass stars (Weinberger+, 2016)
J/AJ/154/147 : Astrometry&photometry late-type dwarfs&subdwarfs (Dahn+, 2017)
J/MNRAS/468/3499 : Partially resolved binaries in PS1 data (Deacon+, 2017)
J/ApJS/231/15 : Astrom. monitoring ultracool dwarf binaries (Dupuy+, 2017)
J/AJ/153/14 : Solar neighbourhood XXXVIII. Nearby M dwarf (Winters+, 2017)
J/ApJS/234/1 : Catalog M, L, & T dwarfs from PS1 3π Survey (Best+, 2018)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/AJ/155/265 : Solar neighbourhood. XLIV. RECONS discoveries (Henry+, 2018)
J/ApJ/867/109 : Spitzer observations of Y and T dwarfs (Martin+, 2018)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 26 A26 --- Name Star name
28- 28 A1 --- f_Name Specific star notes (1)
30- 39 A10 --- SpT-op Optical spectral type (2)
41- 52 A12 --- SpT-ir Infrared spectral type (2)
54- 58 F5.2 mag Jmag [12.63/19.06]? mean pipeline measured MKO J
band magnitude
60- 63 F4.2 mag e_Jmag [0.02/0.02]? Uncertainty in Jmag
65- 68 F4.2 arcsec FWHM [0.72/1.5]? mean Full Width at Half Maximum
70- 73 F4.2 arcsec e_FWHM [0.05/0.52]? Uncertainty (Root Mean Square)
in FWHM
75- 79 F5.3 --- dAirmass [0.006/0.301]? Maximum difference in airmass
across all epochs
81- 83 A3 s Tint Exposure time for each image (3)
87- 90 I4 --- Nfr [18/1066] Total number, frames obtained
92- 93 I2 --- Nep [1/18] Total number, epoch (nights) observed
95- 97 F3.1 yr dt [0.0/3.7] Time span (Δt)
99-102 I4 --- Nref [25/3394]? Number of stars used for the
astrometric reference frame
104-107 I4 --- Ncal [10/3303]? Number of subset of Nref used for
absolute astrometric calibration
109-112 I4 --- Nabs [4/1077]? Number of subset of Nref used to
correct the final parallaxes from relative
to absolute
114-117 F4.1 mas Domega [-1.9/3.6]? Offset, relative to absolute
parallax computed for each field
119-121 F3.1 mas e_Domega [0.0/1.2]? Uncertainty in Domega
123-127 A5 --- r_Name Discovery reference for star
(See refs.dat file)
129-133 A5 --- r_SpT Spectral type reference (See refs.dat file)
--------------------------------------------------------------------------------
Note (1): Notes as follows:
b = With fewer than six epochs observed, a robust astrometric solution
could not be calculated for this object;
c = WISE J033605.05-014350.4 proved too faint to be detected in our
longest 300s frames;
d = For its first epoch, WISEPA J050003.05-122343.2 was erroneously
observed with tint=15s and 9 dithers;
e = No robust astrometric solution for 2MASS J21371044+1450475 could
be calculated from our data (Section 5.6).
Note (2): Optical/NIR spectral types: for binaries, we list the
integrated-light spectral type(s). Most spectral types have an uncertainty
of ±0.5 subtypes; types uncertain by ±1 and ±2 subtypes are
denoted by ":" and "::", respectively.
Note (3): Integration times listed in the format x;5 indicate that
observations prior to 2016 February 01 UT used x second integrations,
while subsequent observations used 5 second integrations.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 26 A26 --- Name Star name
28- 28 A1 --- f_Name Flag(s) on Name (1)
30- 40 F11.7 deg RAdeg Right Ascension (J2000)
42- 52 F11.7 deg DEdeg [-30/60] Declination (J2000)
54- 61 F8.2 d Epoch [56782/57681] Epoch of first observation,
Julian Date -2400000.5
63- 67 F5.1 mas omega-rel [15/158] Relative parallax (ωrel)
69- 72 F4.1 mas e_omega-rel [1.5/10.6] Uncertainty in omega-rel
74- 80 F7.1 mas/yr pmRA-rel [-1217/1232] Relative proper motion in RA,
(µα,relcosδ)
82- 85 F4.1 mas/yr e_pmRA-rel [1/15.1] Uncertainty in pmRA-rel
87- 93 F7.1 mas/yr pmDE-rel [-1843/1466] Relative proper motion in DE
(µδ,rel)
95- 98 F4.1 mas/yr e_pmDE-rel [1.1/11.1] Uncertainty in pmDE-rel
100-104 F5.1 mas omega-abs [15.7/159.2] Absolute parallax
(ωabs) (2)
106-109 F4.1 mas e_omega-abs [1.5/10.6] Uncertainty in omega-abs (2)
111-117 F7.1 mas/yr pmRA-abs [-1225/1238] Absolute proper motion in RA,
(µα,abscosδ (2)
119-122 F4.1 mas/yr e_pmRA-abs [1/15.1] Uncertainty in pmRA-abs (2)
124-130 F7.1 mas/yr pmDE-abs [-1848/1461] Absolute proper motion in DE
(µδ,abs) (2)
132-135 F4.1 mas/yr e_pmDE-abs [1.1/11.1] Uncertainty in pmDE-abs (2)
137-140 F4.1 --- chi2 [3.2/58.9] smallest χ^2 among the
IRLS+MCMC chains
142-144 I3 --- dof [7/31] Degrees of freedom for dataset
--------------------------------------------------------------------------------
Note (1): Flags as follows:
a = Observations for ULAS J085910.69+101017.1 and UGPS J20480024+503821.9
span only one year. While our astrometric solutions appear to be robust,
the parallax and proper motions should be regarded as preliminary;
b = This known 0.9" binary (Burgasser+, 2009AJ....138.1563B 2009AJ....138.1563B) is
resolved in our UKIRT images. Our astrometric solution appears
reasonable (Section 6.6) but should be treated with caution.
Note (2): Absolute values incorporate a correction for the mean parallax and
proper motion of our reference stars (Table1), which includes an
additional uncertainty added in quadrature to the relative astrometry
uncertainties (Section 5.5).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 26 A26 --- Name Star name
28- 28 A1 --- f_Name Flag on Name (1)
30- 33 F4.1 mas omega-abs [26.6/84.6] Absolute parallax, this work
35- 37 F3.1 mas e_omega-abs [1.8/5.9] Uncertainty in omega-abs
39- 44 F6.2 mas omega-lit [36.61/116.0] Relative parallax
46- 50 F5.2 mas e_omega-lit [1.6/29.0] Uncertainty in omega-lit
52- 52 I1 --- r_omega-lit [1/6] Literature source, omega-lit (2)
54- 58 F5.1 mas Domega [-73.1/25.1] Parallax difference
(Δω)
60- 63 F4.1 mas e_Domega [3.0/29.1] Uncertainty in Domega
65- 68 F4.1 --- sigma [-3.2/2.3] Parallax difference / total
uncertainty
(Δω/σΔω)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
a = Discussed in Section 7.2 in detail: 2MASS J02132062+3648506C in
Section 7.2.1 and HIP73169B in Section 7.2.3.
Note (2): References as follows:
1 = Deacon+, 2017MNRAS.467.1126D 2017MNRAS.467.1126D
2 = Faherty+, 2012, J/ApJ/752/56
3 = Kirkpatrick+, 2011, J/ApJS/197/19
4 = Kirkpatrick+, 2019ApJS..240...19K 2019ApJS..240...19K
5 = Smart+, 2018MNRAS.481.3548S 2018MNRAS.481.3548S
6 = van Leeuwen+, 2007ASSL..350.....V 2007ASSL..350.....V
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 25 A25 --- Name Star name
27- 34 A8 --- SpT Spectral Type
36- 39 F4.1 pc Dist-phot [13.1/31.2] Photometric Distance
41- 43 F3.1 pc e_Dist-phot [1.3/3.1] Uncertainty in Dist-phot
45- 49 A5 --- Assoc-lit Literature Association (1)
51- 54 F4.1 % Mem-lit [86.4/97.1] Literature membership probability
(2)
56- 60 A5 --- r_Assoc-lit Reference for literature association (3)
62- 65 F4.1 pc Dist-par [19.2/43.3] Parallax based Distance
67- 69 F3.1 pc e_Dist-par [1.4/7.1] Uncertainty in Dist-par
71- 75 A5 --- Assoc-new Updated Association (1)
77- 80 F4.1 % Mem-new [97/100] Updated membership probability (4)
82- 82 A1 --- f_Assoc-new Flag on Association (5)
--------------------------------------------------------------------------------
Note (1): Association as follows:
TWA = TW Hydrae Association;
BPMG = β Pictoris Moving Group;
ABDMG = AB Doradus Moving Group.
Note (2): Probabilities for previous memberships were calculated using the
online BANYAN II tool (Malo et al. 2013ApJ...762...88M 2013ApJ...762...88M;
Gagne et al. 2014ApJ...783..121G 2014ApJ...783..121G).
Note (3): References as follows:
1 = Schneider+, 2016ApJ...822L...1S 2016ApJ...822L...1S
2 = Gagne+, 2017ApJS..228...18G 2017ApJS..228...18G
3 = Best+, 2015, J/ApJ/814/118
4 = Mace+, 2013, J/ApJ/762/88
5 = Best+, 2013ApJ...777...84B 2013ApJ...777...84B
Note (4): Probabilities for updated memberships were calculated using the
online BANYAN Σ tool (Gagne+, 2018ascl.soft01001G).
Note (5): Flag as follows:
a = change in status from TWA to field is a result of differences
in the models of TWA and/or the field population between BANYAN II and
BANYAN Σ. WISEA J1147-2040 lies at the extreme edge of the TWA
population, so determining its true membership will require more careful
analysis.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 25 A25 --- Name Primary name
27- 37 A11 --- SpT-pri Primary spectral type
39- 43 F5.2 mas omega-pri [22.25/70.02] Primary parallax
45- 48 F4.2 mas e_omega-pri [0.04/3.2] Uncertainty in omega-pri
50- 50 A1 --- f_omega-pri Flag on omega-pri (1)
52- 58 F7.2 mas/yr pmRA-pri [-995.2/381.54] Primary proper motion in RA,
(µα,pricosδ)
60- 63 F4.2 mas/yr e_pmRA-pri [0.05/7] Uncertainty in pmRA-pri
65- 65 A1 --- f_pmRA-pri Flag on pmRA-pri (1)
67- 73 F7.2 mas/yr pmDE-pri [-512.98/244.28] Primary proper motion in DE
(µδ)
75- 78 F4.2 mas/yr e_pmDE-pri [0.04/6.1] Uncertainty in pmDE-pri
80- 80 A1 --- f_pmDE-pri Flag on pmDE-pri (1)
82-107 A26 --- Comp Companion name
109-123 A15 --- SpT-comp Companion spectral type
125-125 A1 --- f_SpT-comp Flag on SpT-comp (1)
127-130 F4.1 mas omega-comp [26.6/70.1] Companion parallax
132-134 F3.1 mas e_omega-comp [2.5/4.3] Uncertainty in omega-comp
136-136 A1 --- f_omega-comp Flag on omega-comp (1)
138-144 F7.1 mas/yr pmRA-comp [-1011.7/372.6] Companion proper motion in
RA, (µα,seccosδ)
146-148 F3.1 mas/yr e_pmRA-comp [1.7/5.0] Uncertainty in pmRA-comp
150-150 A1 --- f_pmRA-comp Flag on pmRA-comp (1)
152-157 F6.1 mas/yr pmDE-comp [-513.8/250.1] Companion proper motion in DE
(µδ)
159-161 F3.1 mas/yr e_pmDE-comp [1.9/4.6] Uncertainty in pmDE-comp
163-163 A1 --- f_pmDE-comp Flag on pmDE-comp (1)
165-169 F5.1 arcsec Sep [6.4/265.0] Separation
171-181 A11 --- Refs References (2)
--------------------------------------------------------------------------------
Note (1): Flags as follows:
a = Astrometry from Gaia DR2 (Gaia Collaboration+, I/345) except where
indicated
b = Companion spectral types are near-infrared. Additional optical
spectral types for specific objects are given footnotes
c = Astrometry from UKIRT (this work)
d = Optical spectral type L7 (Kirkpatrick+, 2010, J/ApJS/190/100);
e = Also has Gaia DR2 measurements of parallax=36.09±0.73mas,
pmRA*cos(DEdeg)=-12.71±0.87, pmDE=-151.51±0.94;
f = Optical spectral type L8 (unresolved; Wilson+, 2001AJ....122.1989W 2001AJ....122.1989W)
g = Optical spectral type L4.5 (unresolved;
Kirkpatrick+, 2000AJ....120..447K 2000AJ....120..447K);
h = Also has Gaia DR2 measurements of parallax=42.87±1.10,
pmRA*cos(DEdeg)=-236.35±2.13, pmDE=-152.07±2.11;
i = Parallax from Dittmann+, 2014, J/ApJ/784/156, proper motion
from Kirkpatrick+, 2016, J/ApJS/224/36; Gaia DR2 reported only
a position for this object;
j = Also has Gaia DR2 measurements of parallax=47.44±0.65,
pmRA*cos(DEdeg)=251.25±1.31, pmDE=79.57±1.25.
Note (2): References as follows:
1 = Barnaby+, 2000AJ....119..378B 2000AJ....119..378B
2 = Bidelman, 1951ApJ...113..304B 1951ApJ...113..304B
3 = Burgasser+, 2006, J/ApJ/637/1067
4 = Cenarro+, 2007, J/MNRAS/374/664
5 = Deacon+, 2012ApJ...755...94D 2012ApJ...755...94D
6 = Deacon+, 2012ApJ...757..100D 2012ApJ...757..100D
7 = Deacon+, 2014, J/ApJ/792/119
8 = Deacon+, 2017MNRAS.467.1126D 2017MNRAS.467.1126D
9 = Dittmann+, 2014, J/ApJ/784/156
10 = Dupuy & Liu, 2012, J/ApJS/201/19
11 = Gray+, 2003, J/AJ/126/2048
12 = Gray+, 2006, J/AJ/132/161
13 = Janson+, 2012, J/ApJ/754/44
14 = Kirkpatrick+, 2001AJ....121.3235K 2001AJ....121.3235K
15 = Kirkpatrick+, 2010, J/ApJS/190/100
16 = Kirkpatrick+, 2011, J/ApJS/197/19
17 = Kirkpatrick+, 2016, J/ApJS/224/36
18 = Murray+, 2011MNRAS.414..575M 2011MNRAS.414..575M
19 = Muzic+, 2012AJ....144..180M 2012AJ....144..180M
20 = Radigan+, 2008ApJ...689..471R 2008ApJ...689..471R
21 = Reid+, 1995, III/198
22 = Reid+, 2003, J/AJ/126/3007
23 = Scholz, 2010A&A...515A..92S 2010A&A...515A..92S
24 = Scholz, 2010A&A...515A..92S 2010A&A...515A..92S
25 = Wilson+, 2001AJ....122.1989W 2001AJ....122.1989W
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref [1-84] Reference number
4-21 A18 --- Autors First autor(s) of the reference
23-41 A19 --- BIB Bibcode of the reference
43-58 A16 --- Cat Catalog associated
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Dupuy T.J. Paper I. 2012ApJS..201...19D 2012ApJS..201...19D cat. J/ApJS/201/19
Liu M.C. Paper II. 2016ApJ...833...96L 2016ApJ...833...96L cat. J/ApJ/833/96
Dupuy T.J. Paper III. 2018AJ....156...57D 2018AJ....156...57D
(End) Prepared by [AAS], Coralie Fix [CDS], 07-Jul-2020