J/ApJ/883/205 Ultracool SpeXtroscopic survey. I. M7-L5 sample (Bardalez+, 2019)
The ultracool SpeXtroscopic survey.
I. Volume-limited spectroscopic sample and luminosity function of M7-L5
ultracool dwarfs.
Bardalez Gagliuffi D.C., Burgasser A.J., Schmidt S.J., Theissen C.,
Gagne J., Gillon M., Sahlmann J., Faherty J.K., Gelino C., Cruz K.L.,
Skrzypek N., Looper D.
<Astrophys. J., 883, 205-205 (2019)>
=2019ApJ...883..205B 2019ApJ...883..205B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, brown dwarf; Stars, M-type; Stars, L-type; Spectral types;
Spectra, infrared; Photometry, infrared; Stars, distances;
Radial velocities; Proper motions
Keywords: astronomical databases: miscellaneous; binaries: close
binaries: general; brown dwarfs; infrared: stars
stars: fundamental parameters
Abstract:
We present a volume-limited, spectroscopically verified sample of
M7-L5 ultracool dwarfs (UCDs) within 25pc. The sample contains
410 sources, of which 93% have trigonometric distance measurements
(80% from Gaia DR2) and 81% have low-resolution (R∼120), near-infrared
(NIR) spectroscopy. We also present an additional list of 60 sources
that may be M7-L5 dwarfs within 25pc when distance or spectral-type
uncertainties are taken into account. The spectra provide NIR spectral
and gravity classifications, and we use these to identify young
sources, red and blue J-KS color outliers, and spectral binaries. We
measure very low gravity and intermediate-gravity fractions of
2.1-0.8+0.9 and 7.8-1.5+1.7, respectively; fractions of red
and blue color outliers of 1.4-0.5+0.6 and 3.6-0.9+1.0,
respectively; and a spectral binary fraction of 1.6-0.5+0.5. We
present an updated luminosity function for M7-L5 dwarfs continuous
across the hydrogen-burning limit that agrees with previous studies.
We estimate our completeness to range between 69% and 80% when
compared to an isotropic model. However, we find that the literature
late-M sample is severely incomplete compared to L dwarfs, with
completeness of 62-7+8 and 83-9+10, respectively. This
incompleteness can be addressed with astrometric-based searches of
UCDs with Gaia to identify objects previously missed by color- and
magnitude-limited surveys.
Description:
In this paper, we present a new volume-limited sample of M7-L5
ultracool dwarfs within 25pc, accompanied by NIR spectra homogeneously
acquired with the SpeX spectrograph on the NASA Infrared Telescope
Facility (IRTF).
Two hundred and forty 25pc sample members had SpeX spectra in the SpeX
Prism Library (SPL; Burgasser 2014ASInC..11....7B 2014ASInC..11....7B) prior to 2015. We
observed an additional 286 sources with SpeX (0.75-2.5um) between UT
2015-Feb-24 and 2018-Nov-22 as part of NASA IRTF programs 2015A074,
2015B087, 2016A079, 2016B114, 2017A102, 2018B120 (PI: Bardalez
Gagliuffi), and 2016A038 (PI: Burgasser) over a total of 15 nights.
The observations log is summarized in Table 7. See Section 3.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 106 472 Bona fide and 1σ samples of M7-L5
ultracool dwarfs in the 25pc volume
table4.dat 210 470 Multi-wavelength photometry for bona fide and
1σ samples of M7-L5 ultracool dwarfs
in the 25pc volume
table5.dat 137 471 Bona fide and 1σ samples of M7-L5
ultracool dwarfs in the 25pc volume
table6.dat 73 471 Trigonometric and spectrophotometric distances
of bona fide and 1σ samples of M7-L5
ultracool dwarfs in the 25pc volume
table7.dat 87 286 SpeX observing log
table8.dat 175 69 Intermediate gravity and very low gravity
sources in the M7-L5 25pc Sample
table9.dat 64 23 Red and blue J-Ks color outliers
table10.dat 92 57 Spectral binary candidates with M7-L7 primary
components
table11.dat 92 57 Ultracool binaries with M7-L5 primaries in
the 25pc sample
refs.dat 51 209 References
--------------------------------------------------------------------------------
See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2020)
III/198 : Palomar/MSU nearby star spectroscopic survey (Hawley+ 1997)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/298 : LSPM-North Catalog (Lepine+ 2005)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
I/322 : UCAC4 Catalogue (Zacharias+, 2012)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
J/ApJ/414/279 : Faintest stars (Tinney, 1993)
J/ApJS/94/749 : RI photometry of cool dwarfs (Kirkpatrick+ 1994)
J/A+A/338/1066 : Optical Spectra of DENIS Brown Dwarf Candidate (Tinney+ 1998)
J/ApJ/540/1016 : K-band & NICMOS phot. of Trapezium Cluster (Luhman+, 2000)
J/AJ/123/3356 : Palomar/MSU nearby star sp. survey. III. (Gizis+, 2002)
J/AJ/124/1190 : Northern high proper motion stars in DSS (Lepine+, 2002)
J/A+A/397/575 : Liverpool-Edinburgh high proper motion survey (Pokorny+, 2003)
J/ApJ/582/1011 : Revised NLTT Catalog (Salim+, 2003)
J/AJ/125/1598 : High proper motion stars in the northern sky (Lepine+, 2003)
J/A+A/401/959 : 35 DENIS late-M dwarfs between 10 and 30pc (Phan-Bao+, 2003)
J/AJ/125/3302 : HST binary very low mass stars and brown dwarfs (Gizis+, 2003)
J/AJ/126/1526 : IR photometry of ultracool dwarfs (Bouy+, 2003)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/AJ/127/3553 : JHK phot. and spectroscopy for L and T dwarfs (Knapp+, 2004)
J/A+A/421/763 : Liverpool-Edinburgh High Proper Motion Cat. (Pokorny+, 2004)
J/AJ/128/463 : A preliminary 20pc census from the NLTT cat. (Reid+, 2004)
J/A+A/435/363 : Southern Infrared Proper Motion Survey (Deacon+, 2005)
J/PASP/117/676 : LHS faint proper-motion stars (Reid+, 2005)
J/A+A/440/1061 : Southern red high proper motion objects (Lodieu+, 2005)
J/A+A/441/653 : 32 DENIS nearby red dwarfs (Crifo+, 2005)
J/A+A/442/211 : Spectroscopic distances of 322 NLTT stars (Scholz+, 2005)
J/A+A/446/515 : Distances of nearby ultracool dwarfs (Phan-Bao+, 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/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006)
J/AJ/132/891 : Binaries among nearby L dwarfs (Reid+, 2006)
J/ApJ/648/629 : Radio observations of late M, L, and T dwarfs (Berger+, 2006)
J/MNRAS/373/705 : Opt. spectroscopy of high proper motion stars (Reyle+, 2006)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/AJ/133/971 : Wide companions of low-mass stars and BDs (Allen+, 2007)
J/AJ/133/2258 : Activity and kinematics of ultracool dwarfs (Schmidt+, 2007)
J/AJ/133/2825 : Star beyond the NLTT catalog (Reid+, 2007)
J/MNRAS/383/831 : New DENIS nearby L and late-M dwarfs (Phan-Bao+, 2008)
J/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/MNRAS/384/1399 : Proper motions of field L and T dwarfs (Jameson+, 2008)
J/ApJ/676/1281 : L and T dwarfs in 2MASS/SDSS (Metchev+, 2008)
J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)
J/MNRAS/390/1517 : Proper motions of field L and T dwarfs (Casewell+, 2008)
J/ApJ/689/1295 : Lithium test implications for BDs (Kirkpatrick+, 2008)
J/AJ/137/1 : PMs and astrometry of late-type dwarfs (Faherty+, 2009)
J/A+A/497/619 : New ultra-cool dwarfs from SDSS and 2MASS (Zhang+, 2009)
J/MNRAS/394/857 : UKIDSS-2MASS proper motion survey (Deacon+, 2009)
J/ApJ/699/649 : Young M dwarfs within 25pc. I. (Shkolnik+, 2009)
J/ApJ/704/975 : Rotational velocities for M dwarfs (Jenkins+, 2009)
J/ApJ/705/1416 : Volume-limited sample of M7-M9.5 dwarfs <20pc (Reiners+, 2009)
J/ApJ/710/1142 : SpeX spectroscopy of low mass binaries. I. (Burgasser+, 2010)
J/MNRAS/402/575 : Ultracool dwarfs in young moving groups (Clarke+, 2010)
J/A+A/512/A37 : Velocities of 43 nearby L dwarfs (Seifahrt+, 2010)
J/MNRAS/403/1949 : UBV(RcIc)JHK photometry of HIP nearby stars (Koen+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/ApJS/190/100 : NIR proper motion survey using 2MASS (Kirkpatrick+, 2010)
J/MNRAS/407/2269 : Polarisation of a sample of late M dwarfs (Morin+, 2010)
J/A+A/522/A112 : i'z' phot. of L5 and later dwarf candidates (Reyle+, 2010)
J/ApJ/723/684 : NIRSPEC ultracool dwarf radial velocity survey (Blake+, 2010)
J/AJ/141/97 : SDSS DR7 M dwarfs (West+, 2011)
J/AJ/142/92 : New proper motion stars with pm≥0.18"/yr (Boyd+, 2011)
J/AJ/142/138 : All-sky catalog of bright M dwarfs (Lepine+, 2011)
J/ApJ/743/156 : NEOWISE obs. of NEOs: preliminary results (Mainzer+, 2011)
J/ApJS/197/19 : First brown dwarfs discovered by WISE (Kirkpatrick+, 2011)
J/ApJ/753/156 : T/Y brown dwarfs with WISE photometry (Kirkpatrick+, 2012)
J/A+A/545/A85 : LHS1070 photometry and spectroscopy (Rajpurohit+, 2012)
J/A+A/546/A69 : Orbits of visual binaries and dynamical masses (Malkov+, 2012)
J/AJ/144/99 : Near-IR spectroscopy of 36 late M dwarfs (Deshpande+, 2012)
J/MNRAS/427/3280 : Ultra-cool dwarfs at low Galactic latitudes (Folkes+, 2012)
J/MNRAS/428/2824 : Rapid optical variability in ultracool dwarfs (Koen, 2013)
J/ApJS/205/6 : T dwarf population revealed by WISE (Mace+, 2013)
J/AJ/145/102 : Sp. of bright M dwarfs in the northern sky (Lepine+, 2013)
J/MNRAS/430/1171 : Sub-stellar birth rate from UKIDSS (Day-Jones+, 2013)
J/PASP/125/809 : New nearby M, L, and T dwarfs (Thompson+, 2013)
J/A+A/556/A15 : Effective temperature scale of M dwarfs (Rajpurohit+, 2013)
J/ApJS/208/9 : Intrinsic colors and temperatures of PMS stars (Pecaut+, 2013)
J/AJ/147/20 : Spectroscopy of 447 nearby M dwarfs (Newton+, 2014)
J/AJ/147/34 : SpeX library of L-type dwarfs (Schneider+, 2014)
J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)
J/ApJ/784/156 : Parallaxes for nearby mid-to-late M dwarfs (Dittmann+, 2014)
J/ApJ/787/126 : WISE reduced proper motions and spectral types (Luhman+, 2014)
J/ApJ/792/119 : Companions to nearby stars from Pan-STARRS 1 (Deacon+, 2014)
J/MNRAS/443/2561 : CONCH-SHELL catalog of nearby M dwarfs (Gaidos+, 2014)
J/ApJ/794/143 : New SpeX Observations of M7-L6 Dwarfs (Bardalez+, 2014)
J/AJ/148/122 : YSOVAR: infrared photometry in Lynds 1688 (Gunther+, 2014)
J/AcA/64/359 : Catalog of binary UV Ceti stars (Tamazian+, 2014)
J/AJ/149/5 : Solar neighborhood. XXXV. Dist. to M dwarfs (Winters+, 2015)
J/ApJ/800/85 : Teff, radii and luminosities of cool dwarfs (Newton+, 2015)
J/A+A/577/A128 : CARMENES input cat. of M dwarfs. I (Alonso-Floriano+, 2015)
J/AJ/149/158 : The BUD sample. I. L dwarf activity sample (Schmidt+, 2015)
J/MNRAS/449/3651 : L and T dwarfs from UKIDSS LAS (Marocco+, 2015)
J/AJ/150/57 : SLoWPoKES-II catalog (Dhital+, 2015)
J/ApJ/810/158 : M,L,T dwarfs fundamental param. and SEDs (Filippazzo+, 2015)
J/ApJS/220/16 : SpeX NIR survey of 886 nearby M dwarfs (Terrien+, 2015)
J/ApJS/220/18 : BDKP IV. RVs of late-M & L dwarfs with MagE (Burgasser+, 2015)
J/ApJ/812/3 : MEarth mid-to-late M dwarfs rot. & kinematics (West+, 2015)
J/ApJ/814/118 : L/T transition dwarfs with PS1 & WISE. II. (Best+, 2015)
J/ApJ/817/112 : NEOWISE/AllWISE high proper motion objects (Schneider+, 2016)
J/ApJ/818/153 : MEarth photometry: nearby M-dwarf magnitudes (Dittmann+, 2016)
J/ApJS/224/36 : The AllWISE motion survey (AllWISE2) (Kirkpatrick+, 2016)
J/AJ/152/24 : Trig. parallaxes of 134 low-mass stars (Weinberger+, 2016)
J/ApJS/225/10 : Kinematic analysis of M7-L8 dwarfs (Faherty+, 2016)
J/ApJ/833/96 : Hawaii infrared parallax program. II. (Liu+, 2016)
J/A+A/598/A92 : New ultracool subdwarfs (Lodieu+, 2017)
J/AJ/153/92 : Late-Type Extension to MoVeRS (LaTE-MoVeRS) (Theissen+, 2017)
J/MNRAS/466/2983 : Wide low very low-mass binary systems (Galvez-Ortiz+, 2017)
J/MNRAS/469/401 : Known LT dwarfs in the Gaia DR1 (Smart+, 2017)
J/AJ/154/112 : NIR sp. of new L and T dwarf candidates (Kellogg+, 2017)
J/AJ/154/147 : Astrometry&phot. for late-type dwarfs&subdwarfs (Dahn+, 2017)
J/AJ/154/151 : The solar neighborhood .XXXX. Young stars (Bartlett+, 2017)
J/AJ/155/34 : Analysis of the NIR sp. of neighboring L dwarfs (Cruz+, 2018)
J/ApJS/234/1 : Cat. of M, L, & T dwarfs from PS1 3π Survey (Best+, 2018)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/ApJ/862/173 : Nearby low-mass stars proper motions (Theissen, 2018)
J/A+A/619/L8 : Ultra-cool dwarfs candidates in Gaia DR2 (Reyle, 2018)
J/ApJS/240/19 : Parallaxes of late-T and Y dwarfs (Kirkpatrick+, 2019)
http://jgagneastro.wordpress.com/list-of-ultracool-dwarfs/ : List of UCDs
http://www.browndwarfs.org/spexprism : SpeX Prism Spectral Libraries
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [1/2] Sample type (G1)
3- 29 A27 --- Name Star name
31- 51 A21 --- ID Identifier
53- 56 A4 --- SpT Adopted spectral type
58- 61 A4 --- n_SpT Note on how SpT was determined
63- 67 F5.2 mag Jmag [7.79/16.62]? The J band magnitude
69- 72 F4.2 mag e_Jmag [0.02/0.3]? Uncertainty in Jmag
74- 77 F4.2 mag J-Ks [0.5/2.6]? The (J-KS) color
79- 82 F4.2 mag e_J-Ks [0.03/0.31]? Uncertainty in J-Ks
84- 88 F5.2 pc Dist [3.58/35.71] Distance
90- 94 F5.2 pc e_Dist [0/28.01] Uncertainty in Dist
96-102 A7 --- n_Dist Note on how Dist was determined
104-106 I3 --- Ref [2/118] Reference code (see refs.dat file)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [2/3] Sample type (G1)
3- 29 A27 --- Name Star name
31 A1 --- f_Name [abcd] Flag on Name (1)
33- 36 A4 --- SpT Adopted spectral type
38- 41 A4 --- n_SpT Note on how SpT was determined
43- 47 F5.2 mag rmag [14.6/24.9]? SDSS r band magnitude
49- 52 F4.2 mag e_rmag [0/0.9]? Uncertainty in SDSS rmag
54- 58 F5.2 mag imag [13.2/21.11]? SDSS i band magnitude
60- 63 F4.2 mag e_imag [0/0.09]? Uncertainty in SDSS imag
65- 69 F5.2 mag zmag [11.7/18.62]? SDSS z band magnitude
71- 74 F4.2 mag e_zmag [0/0.04]? Uncertainty in SDSS zmag
76- 80 F5.2 mag 2Jmag [7.79/16.62]? 2MASS J band magnitude
82- 85 F4.2 mag e_2Jmag [0.02/0.3]? Uncertainty in 2MASS Jmag
87- 91 F5.2 mag 2Hmag [7.24/15.32]? 2MASS H band magnitude
93- 96 F4.2 mag e_2Hmag [0.02/0.21]? Uncertainty in 2MASS Hmag
98-102 F5.2 mag 2Ksmag [6.89/14.41] 2MASS Ks band magnitude
104-107 F4.2 mag e_2Ksmag [0.01/0.16]? Uncertainty in 2MASS Ksmag
109-113 F5.2 mag MJmag [8.34/16.53]? MKO J band magnitude
115-118 F4.2 mag e_MJmag [0.01/0.22]? Uncertainty in MKO Jmag
120-124 F5.2 mag MHmag [7.9/15.4]? MKO H band magnitude
126-129 F4.2 mag e_MHmag [0.01/0.15]? Uncertainty in MKO Hmag
131-135 F5.2 mag MKmag [7.5/14.4]? MKO K band magnitude
137-140 F4.2 mag e_MKmag [0.01/0.14]? Uncertainty in MKO Kmag
142-146 F5.2 mag UJmag [11/15.72]? UKIDSS J band magnitude
148-151 F4.2 mag e_UJmag [0/0.01]? Uncertainty in UKIDSS UJmag
153-157 F5.2 mag UHmag [10.5/19.23]? UKIDSS H band magnitude
159-162 F4.2 mag e_UHmag [0/0.21]? Uncertainty in UKIDSS UHmag
164-168 F5.2 mag UKmag [10/18.15]? UKIDSS K band magnitude
170-173 F4.2 mag e_UKmag [0/0.16]? Uncertainty in UKIDSS UKmag
175-179 F5.2 mag W1mag [6.64/13.77]? WISE W1 band magnitude
181-184 F4.2 mag e_W1mag [0.02/0.13]? Uncertainty in WISE W1mag
186-190 F5.2 mag W2mag [6.3/13.61]? WISE W2 band magnitude
192-195 F4.2 mag e_W2mag [0.02/0.05]? Uncertainty in WISE W2mag
197-201 F5.2 mag W3mag [6.29/13]? WISE W3 band magnitude
203-206 F4.2 mag e_W3mag [0.02/0.5]? Uncertainty in WISE W3mag
208-210 I3 --- Ref [2/118] Reference code (see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
a = Individual component flux photometry for LP 881-64BC is reported
in Rajpurohit+ (2012, J/A+A/545/A85). We converted
these fluxes to JHK_S magnitudes using Vega as a reference star.
b = LHS 1901AB does not have reported resolved photometry. We used the
relative JHK' magnitudes from Montagnier+ (2006A&A...460L..19M 2006A&A...460L..19M) to
compute the individual magnitudes. For the MKO K' band we used the
measurement from 08 Jan 2004 that has the largest angular
separations to minimize the effect of blending.
c = Individual component JHK' absolute magnitudes from
Konopacky+ (2010ApJ...711.1087K 2010ApJ...711.1087K) were converted to
apparent magnitudes using Vega as a reference star.
d = Magnitudes are for combined system.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [1/2] Sample type (G1)
3- 29 A27 --- Name Source name
31- 34 A4 --- SpT Adopted spectral type
36- 39 A4 --- n_SpT Note on how SpT was determined
41- 50 A10 --- SpT-o Literature optical spectral type
52- 66 A15 --- SpT-ir Literature NIR spectral type
68- 82 A15 --- SpT-s SIMBAD spectral type
84- 89 A6 --- SpT-sdss SDSS spectral type
91- 95 A5 --- SpT-B07 Burgasser+ 2007ApJ...659..655B 2007ApJ...659..655B spectral type (1)
97- 99 F3.1 --- e_SpT-B07 [0.3/1.2]? Uncertainty in SpT-B07
101-104 A4 --- SpT-A07 Allers+ 2007ApJ...657..511A 2007ApJ...657..511A spectral type (1)
106-108 F3.1 --- e_SpT-A07 [0.3/1]? Uncertainty in SpT-A07
110-114 A5 --- SpT-R01 Reid+ 2001AJ....121.1710R 2001AJ....121.1710R spectral type (1)
116-118 F3.1 --- e_SpT-R01 [0.8/1.4]? Uncertainty in SpT-R01
120-123 A4 --- SpT-Std Standard spectral type
125-137 A13 --- Ref Reference codes for spectral type
classification: optical, NIR, SIMBAD,
Standard (see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Classification by indices.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [1/2] Sample type (G1)
3- 29 A27 --- Name Source name
31- 34 A4 --- SpT Adopted spectral type
36- 39 A4 --- n_SpT Note on how SpT was determined
41- 46 F6.2 mas plx [25.8/280]? Parallax
48- 52 F5.2 mas e_plx [0.06/40]? Uncertainty in Plx
54- 58 F5.2 pc DTrig [3.58/35.71]? Trigonometric distance
60- 64 F5.2 pc e_DTrig [0/16]? Uncertainty in DTrig
66- 67 I2 pc DSpec [3/37]? NIR spectrophotometric distance
69 I1 pc e_DSpec [0/4]? Uncertainty in DSpec
71- 73 I3 --- Ref [1/198]? Reference code for plx
(see refs.dat file)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [1/2] Sample type (1)
3- 24 A22 --- ID Identifier
26 A1 --- f_ID [ab] Flag on ID (2)
28- 33 F6.3 mag Jmag [7.3/17.3]? 2MASS J band magnitude
35- 40 F6.3 mag Ksmag [6.5/15.8]? 2MASS Ks band magnitude
42- 47 A6 arcsec Slit Slit size ("0.5x15" or "0.8x15")
49- 52 I4 s Texp [29/4894] Total exposure time
54- 58 F5.3 --- Air [1/3.1] Airmass
60- 69 A10 "Y/M/D" Date Observation date
71- 77 F7.2 --- S/N [25/1561] Median signal-to-noise
79- 87 A9 --- Std Identifier of A0 standard used
--------------------------------------------------------------------------------
Note (1): Sample type as follows:
1 = within 25 pc;
2 = outside 25 pc.
Note (2): Flag as follows:
a = Magnitudes are for combined system.
b = Background source.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table8.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Set [1/4] Sample type (1)
3- 29 A27 --- Name Source name
31 A1 --- f_Name [bedc] Flag on Name (2)
33- 41 A9 --- SpT-o Optical literature spectral type
43- 57 A15 --- SpT-ir NIR literature spectral type
59- 62 A4 --- SpT-f SpeX field spectral type
64- 76 A13 --- SpT-l SpeX low gravity spectral type
78- 86 F9.3 mas/yr pmRA [-2291/3430]? Proper motion along RA
88- 93 F6.3 mas/yr e_pmRA [0.15/21]? Uncertainty in pmRA
95-102 F8.2 mas/yr pmDE [-3807/1471]? Proper motion along DE
104-108 F5.2 mas/yr e_pmDE [0.1/21]? Uncertainty in pmDE
110-116 F7.2 km/s RVel [-177/74]? Radial velocity
118-123 F6.2 km/s e_RVel [0.05/198]? Uncertainty in RVel
125-129 F5.2 pc Dist [3.8/28.6]? Trigonometric distance
131-134 F4.2 pc e_Dist [0/6.7]? Uncertainty in Dist
136-154 A19 --- YMGProb BANYAN Σ young moving group membership
probability (3)
156-175 A20 --- Ref Reference codes: proper motion, RV, Distance,
Low gravity classification
(see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Sample type as follows:
1 = Very Low Gravity Source;
2 = Intermediate Gravity Source;
3 = Peculiar and/or Low Metallicity Source;
4 = Rejected Low Gravity Candidates from Visual Inspection.
Note (2): Flag as follows:
b = Red J-K_S color outlier.
c = Blue J-K_S color outlier.
d = Member of extended 1σ sample.
e = Teegarden's star.
Note (3): We used BANYAN Σ (Gagne+ 2018, J/ApJ/856/23) on our low-gravity
candidates to assess possible membership in 27 young moving groups
using new kinematic data from Gaia DR2. See Section 4.3.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table9.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- Out "red" or "blue" outlier
6- 28 A23 --- Name Source name
30 A1 --- f_Name Flag on Name (1)
32- 35 A4 --- SpT Adopted spectral type
37- 40 A4 --- n_SpT Note on SpT
42- 45 F4.2 mag J-Ks [0.5/2.52] J-Ks color index
47- 50 F4.2 mag e_J-Ks [0.03/0.3] J-Ks uncertainty
52- 56 F5.2 mag E(J-Ks) [-0.72/0.9] J-Ks excess
58- 60 I3 --- Disc Discovery reference (see refs.dat file)
62- 64 I3 --- Ref ? Young moving group reference
(see refs.dat file)
--------------------------------------------------------------------------------
Note (1): Flag as follows:
b = Here 2MASS J0355+1133 and 2MASS J1741-4642 are members of the AB Doradus
young moving group, while G196-3B is a young, unassociated source.
c = Also classified as INT-G, indicating low metallicity rather than low
gravity.
d = Member of extended 25pc +1σ sample.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table10.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 A12 --- Set "Within 25pc", "Outside 25pc" or
"Rejected candidates"
14- 37 A24 --- Name Name of the source
39- 42 A4 --- SpT-c Combined spectral type
44- 47 A4 --- SpT-P Primary spectral type (1)
49- 51 F3.1 --- e_SpT-P [0/1] SpT-P uncertainty
53- 56 A4 --- SpT-S Secondary spectral type (1)
58- 61 A4 --- e_SpT-S SpT-S uncertainty
63- 66 F4.2 --- DelJ [0.8/5.1] 2MASS J-band difference, ΔJ
68- 71 F4.2 --- e_DelJ [0.1/0.9] DelJ uncertainty
73 A1 --- l_Conf Limit flag on Conf
75- 77 I3 % Conf [32/100] Confidence
79- 80 I2 --- SpInd [4/12] Spectral index (2)
82- 88 A7 --- Ref-P Candidate reference(s) (see refs.dat file)
90- 92 I3 --- Ref-S [63/205]? Confirmed reference
(see refs.dat file)
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Note (1): Primary and secondary spectral types are a weighted average of the
best binary template fits, inversely proportional to their ranked χ2.
Note (2): Strong candidates have been selected by eight or more index-index
plots up to 12, weak candidates by four to eight.
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Byte-by-byte Description of file: table11.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Set Sample (1)
7- 31 A25 --- Name Main name of the source
33 A1 --- f_Name a: Member of extended 25pc +1σ sample
35- 53 A19 --- SpT-c Combined spectral type
55- 59 A5 --- SpT-P Ultracool dwarf primary spectral type
61- 70 A10 --- SpT-S Ultracool dwarf secondary spectral type
72- 76 F5.2 pc Dist [4/33.33] Adopted distance
78- 81 F4.2 pc e_Dist [0/9.11] Dist uncertainty
83- 88 A6 pc Dist2 Second value of distance for
2MASS J15200224-4422419AB
90- 92 I3 --- Ref [10/213] Binary reference
--------------------------------------------------------------------------------
Note (1): Sample as follows:
ultra = ultracool binaries
mult = higher-order multiples containing ultracool dwarf binaries
comp = ultracool companions to main-sequence primaries
--------------------------------------------------------------------------------
Byte-by-byte Description of file: refs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Ref [1/226] Reference code
5- 23 A19 --- BibCode Bibcode of the reference
25- 51 A27 --- Comm Comment
--------------------------------------------------------------------------------
Global notes:
Note (G1): Sample type as follows:
1 = Bona fide sample;
2 = 1σ sample.
3 = 25 pc sample;
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Mar-2021