J/AJ/166/103 UKIRT Hemisphere Survey L, T & Y dwarfs catalog (Schneider+, 2023)
Astrometry and photometry for ∼1000 L, T, and Y dwarfs from the UKIRT
Hemisphere Survey.
Schneider A.C., Munn J.A., Vrba F.J., Bruursema J., Dahm S.E.,
Williams S.J., Liu M.C., Dorland B.N.
<Astron. J., 166, 103 (2023)>
=2023AJ....166..103S 2023AJ....166..103S
ADC_Keywords: Stars, L-type ; Stars, T-type ; Stars, Y-type ;
Photometry, ugriz; Positional data; Spectral types;
Proper motions; Cross identifications; Stars, brown dwarf
Keywords: Brown dwarfs ; L dwarfs ; T dwarfs ; Y dwarfs ; Low mass stars
Abstract:
We present the positions, proper motions, and near-infrared photometry
for 966 known objects with spectral types later than M that were
observed as part of the UKIRT Hemisphere Survey (UHS). We augment the
photometry and astrometry from UHS with information from Gaia DR3,
Pan-STARRS DR2, and CatWISE 2020 to produce a database of homogeneous
photometry and astrometry for this sample. The multi-epoch survey
strategy of UHS allows us to determine the proper motions for most
sources, with a median proper motion uncertainty of ∼3.6mas/yr. Our
UHS proper motion measurements are generally in good agreement with
those from Gaia DR3, Pan-STARRS, and CatWISE 2020, with UHS proper
motions typically more precise than those from CatWISE 2020 and
Pan-STARRS but not Gaia DR3. We critically analyze the publicly
available spectra for 406 members of this sample and provide updated
near-infrared spectral types for ∼100 objects. We determine typical
colors as a function of spectral type and provide absolute magnitude
versus spectral type relations for UHS J- and K-band photometry. Using
newly determined proper motions, we highlight several objects of
interest, such as objects with large tangential velocities, widely
separated co-moving companions, and potential members of young nearby
associations.
Description:
The goal of this work is to compile the UKIRT Hemisphere Survey (UHS)
astrometry and photometry for known L, T, and Y dwarfs in the UHS
footprint.
The photometry from the UHS survey is based on the UKIRT photometric
system, which was designed to closely match photometry from the Mauna
Kea Observatories (MKO) system.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 672 966 The UHS L, T, and Y dwarf catalog
refs.dat 76 157 References used in table A1
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See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
VI/135 : All-sky spectrally matched Tycho2 stars (Pickles+, 2010)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
II/367 : The VISTA Hemisphere Survey (VHS) catalog DR5 (McMahon+, 2020)
II/365 : CatWISE2020 catalog (updated version 28-Jan-2021) (Marocco+, 2021)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
J/ApJ/414/279 : Faintest stars (Tinney, 1993)
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/124/1190 : Northern high proper motion stars in DSS (Lepine+, 2002)
J/A+A/381/446 : Astrometric Radial Velocities. III. (Madsen+, 2002)
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/125/3302 : HST bin very low mass stars and brown dwarfs (Gizis+, 2003)
J/AJ/127/2856 : Brown dwarfs in the 2MASS Survey (Burgasser+, 2004)
J/AJ/127/3553 : JHK photometry and spectro for L and T dwarfs (Knapp+, 2004)
J/other/ARA+A/43.195 : L and T dwarf stars (Kirkpatrick, 2005)
J/ApJ/637/1067 : NIR spectral classification of T dwarfs (Burgasser+, 2006)
J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006)
J/ApJ/645/676 : Spatial distribution brown dwarfs in Taurus (Luhman+, 2006)
J/AJ/132/891 : Binaries among nearby L dwarfs (Reid+, 2006)
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/AJ/133/2258 : Activity and kinematics of ultracool dwarfs (Schmidt+, 2007)
J/A+A/481/661 : Hyades brown dwarfs and very low mass stars (Bouvier+, 2008)
J/MNRAS/384/1399 : Proper motions of field L and T dwarfs (Jameson+, 2008)
J/ApJ/689/1295 : Li test implications for brown dwarfs (Kirkpatrick+, 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/AJ/135/785 : SDSS-DR5 low-mass star spectroscopic sample (West+, 2008)
J/MNRAS/394/857 : UKIDSS-2MASS proper motion survey (Deacon+, 2009)
J/AJ/137/1 : Proper motions & astrometry latetype dwarfs (Faherty+, 2009)
J/A+A/493/L27 : Parallaxes of 10 ultracool subdwarfs (Schilbach+, 2009)
J/A+A/497/619 : New ultra-cool dwarfs from SDSS and 2MASS (Zhang+, 2009)
J/ApJ/723/684 : NIRSPEC ultracool dwarf radial velocity (Blake+, 2010)
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/A+A/522/A112 : i'z' photometry of L5 &later dwarf candidates (Reyle+, 2010)
J/AJ/139/1808 : Colors and kinematics of SDSS L dwarfs (Schmidt+, 2010)
J/MNRAS/404/1817 : 2MASS/SDSS data for 806 ultracool dwarfs (Zhang+, 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/141/97 : SDSS DR7 M dwarfs (West+, 2011)
J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)
J/ApJ/752/56 : BDKP. III. Plxes for 70 ultracool dwarfs (Faherty+, 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/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/783/121 : BANYAN II. Nearby young assoc. cand members (Gagne+, 2014)
J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)
J/ApJ/781/4 : Photo of high proper motion objects from WISE (Luhman, 2014)
J/ApJ/787/126 : WISE reduced proper motions & spectral types (Luhman+, 2014)
J/AJ/147/34 : SpeX library of L-type dwarfs (Schneider+, 2014)
J/MNRAS/437/3603 : NIR proper motion catalogue from UKIDSS-LAS (Smith+, 2014)
J/MNRAS/454/593 : Young moving groups in solar neighbourhood (Bell+, 2015)
J/ApJ/814/118 : L/T transition dwarfs search PS1 & WISE. II. (Best+, 2015)
J/ApJS/219/33 : BANYAN. VII. Candidate YMG members from BASS (Gagne+, 2015)
J/ApJ/798/73 : BANYAN All-Sky Survey catalog. V. Nearby YMGs (Gagne+, 2015)
J/MNRAS/449/3651 : L and T dwarfs from UKIDSS LAS (Marocco+, 2015)
J/AJ/149/158 : The BUD sample. I. L dwarf activity sample (Schmidt+, 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 infrared plx program II Ultracool dwarfs (Liu+, 2016)
J/MNRAS/455/357 : 2MASS J18212815+1414010 field stars (Sahlmann+, 2016)
J/ApJ/817/112 : NEOWISE/AllWISE high proper motion object (Schneider+, 2016)
J/A+A/589/A49 : Photometric brown-dwarf classification (Skrzypek+, 2016)
J/AJ/154/147 : Astrometry&photometry late dwarfs&subdwarfs (Dahn+, 2017)
J/ApJS/231/15 : Astrometric monitoring of ultracool dwarf bin (Dupuy+, 2017)
J/AJ/154/134 : Planetary-mass brown dwarfs in Taurus SFR (Esplin+, 2017)
J/AJ/154/112 : NIR spectroscopy of L & T dwarf candidates (Kellogg+, 2017)
J/ApJ/838/150 : The Taurus-Auriga ecosystem. I. (Kraus+, 2017)
J/AJ/153/95 : Catalog of Suspected Nearby Young Stars (Riedel+, 2017)
J/ApJS/234/1 : Catalog of M, L, & T dwarfs from PS1 3π (Best+, 2018)
J/AJ/155/34 : Analysis of NIR spectra of neighboring Ldwarfs (Cruz+, 2018)
J/ApJ/862/138 : BANYAN. XIII. Nearby young assoc. Gaia DR2 (Gagne+, 2018)
J/ApJ/856/23 : BANYAN. XI. The BANYAN Σ algorithm (Gagne+, 2018)
J/ApJ/867/109 : Spitzer observations of Y and T dwarfs (Martin+, 2018)
J/A+A/619/L8 : Ultra-cool dwarfs candidates in Gaia DR2 (Reyle, 2018)
J/ApJ/858/71 : CHARA array obs. of 13 AB Dor moving group (Schaefer+, 2018)
J/ApJ/862/106 : Stellar & substellar members in Coma Berenices (Tang+, 2018)
J/ApJ/883/205 : Ultracool SpeXtroscopic. I. M7-L5 sample (Bardalez+, 2019)
J/MNRAS/482/4570 : Gaia DR2 white dwarf candidates (Gentile Fusillo+, 2019)
J/AJ/158/182 : Discoveries from NEOWISE proper motion survey (Greco+, 2019)
J/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)
J/ApJS/240/19 : Parallaxes of late-T and Y dwarfs (Kirkpatrick+, 2019)
J/A+A/623/A35 : A 3D view of the Hyades population (Lodieu+, 2019)
J/MNRAS/485/4423 : The Gaia ultracool dwarf sample (Smart+, 2019)
J/ApJ/877/12 : Coma Ber & Neighbor Stellar Group tidal tails (Tang+, 2019)
J/MNRAS/485/5573 : Gaia-DR2 100pc white dwarf population (Torres+, 2019)
J/AJ/159/257 : Hawaii IR plx program IV. L0-T8 BDs with UKIRT (Best+, 2020)
J/ApJ/889/176 : Very low-mass binaries with Gaia DR2 data (Faherty+, 2020)
J/ApJ/903/96 : The µTau Association (MUTA) (Gagne+, 2020)
J/A+A/640/A9 : Open star cluster Coma Berenices multi-photo (Martin+, 2020)
J/ApJ/889/74 : Spitzer follow-up of Y brown dwarfs (Meisner+, 2020)
J/ApJ/899/123 : Spitzer follow up of 95 brown dwarfs (Meisner+, 2020)
J/ApJ/898/77 : NIR spectra of 2 extreme T-type subdwarfs (Schneider+, 2020)
J/AJ/159/166 : Membership & properties of moving groups (Ujjwal+, 2020)
J/ApJ/891/171 : COCONUTS. I. Spectra a WD & T4 comoving syst. (Zhang+, 2020)
J/AJ/161/42 : Volume-limited cool dwarfs. I. L0-T8 dwarfs (Best+, 2021)
J/ApJ/923/48 : Discovery of an Ldwarf co-moving BD+60 1417 (Faherty+, 2021)
J/A+A/649/A6 : Gaia Catalogue of Nearby Stars (Gaia collaboration, 2021)
J/ApJS/257/45 : BDKP. V. Radial & rot. velocities of M, L, T (Hsu+, 2021)
J/ApJS/253/7 : Full-sky census of brown dwarfs 20pc (Kirkpatrick+, 2021)
J/AJ/164/3 : 34 Low-mass comoving astrometry using NSC DR2 (Kiwy+, 2022)
http://wsa.roe.ac.uk/uhsDR2.html : UHS DR2 homepage
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 26 A26 --- Name Discovery name (1)
28- 32 A5 --- r_Name Discovery reference
34- 42 A9 --- SpT-Opt Optical spectral type
44- 46 I3 --- r_SpT-Opt [4/122]? Reference for SpT-Opt
48- 66 A19 --- SpT-IR Near infrared spectral type
68- 70 I3 --- r_SpT-IR [1/157]? Reference for SpT-IR
72- 82 F11.7 deg RAdeg UHS DR2 right ascension (2)
84- 93 F10.7 deg DEdeg UHS DR2 declination (2)
95- 105 F11.7 deg RAUJdeg ? UHS DR2 J-band right ascension (2)
107- 112 F6.3 mas e_RAUJdeg [5/92]? Uncertainty in RA-UHS-J
114- 123 F10.7 deg DEUJdeg ? UHS DR2 J-band right declination (2)
125- 130 F6.3 mas e_DEUJdeg [6/92]? Uncertainty in Dec-UHS-J
132- 139 F8.3 yr UJEpoch [2012/2018]? UHS DR2 J-band epoch
141- 151 F11.7 deg RAUKdeg ? UHS DR2 K-band right ascension (2)
153- 158 F6.3 mas e_RAUKdeg [5/90]? Uncertainty in RA-UHS-K
160- 169 F10.7 deg DEUKdeg ? UHS DR2 K-band right declination (2)
171- 176 F6.3 mas e_DEUKdeg [5/90]? Uncertainty in Dec-UHS-K
178- 185 F8.3 yr UKEpoch [2017/2021]? UHS DR2 K-band epoch
187- 193 F7.4 mag Jmag [11.6/19.7]? UHS DR2 J magnitude
195- 200 F6.4 mag e_Jmag [0.001/0.2]? Uncertainty in Jmag
202- 208 F7.4 mag Kmag [10.6/18.5]? UHS DR2 K magnitude
210- 215 F6.4 mag e_Kmag [0.0008/0.3]? Uncertainty in Kmag
217- 224 F8.2 mas/yr pmRA [-1855/2606]? UHS proper motion in RA
226- 230 F5.2 mas/yr e_pmRA [1/41]? Uncertainty in UHS-pmra
232- 239 F8.2 mas/yr pmDE [-1464/1467]? UHS proper motion in DE
241- 245 F5.2 mas/yr e_pmDE [0.8/42]? Uncertainty in UHS-pmdec
247- 261 F15.11 deg RAGaiadeg ? Gaia DR3 right ascension
263- 275 F13.10 deg DEGaiadeg ? Gaia DR3 declination
277- 284 F8.4 mas Gaia-plx [7.12/156]? Gaia DR3 parallax
286- 291 F6.4 mas e_Gaia-plx [0.09/3]? Uncertainty in Gaia-plx
293- 301 F9.3 mas/yr Gaia-pmra [-1856/902]? Gaia DR3 proper motion in RA
303- 307 F5.3 mas/yr e_Gaia-pmra [0.1/3]? Uncertainty in Gaia-pmra
309- 317 F9.3 mas/yr Gaia-pmdec [-1249/1465]? Gaia DR3 proper motion in DE
319- 323 F5.3 mas/yr e_Gaia-pmdec [0.08/3]? Uncertainty in Gaia-pmdec
325- 333 F9.6 mag Gmag [16.6/21.6]? Gaia DR3 G magnitude
335- 343 F9.6 mag RPmag [18.8/23.6]? Gaia DR3 G_RP magnitude
345- 353 F9.6 mag BPmag [14.9/20.6]? Gaia DR3 G_BP magnitude
355- 375 A21 --- PS1 Pan-Starrs DR2 designation
377- 387 F11.7 deg RAPS1deg ? Pan-Starrs DR2 right ascension
389- 398 F10.7 deg DEPS1deg ? Pan-Starrs DR2 declination
400- 406 F7.4 mag gmag [17/30.2]? Pan-Starrs g magnitude
408- 413 F6.4 mag e_gmag [0.008/0.3]? Uncertainty in gmag
415- 421 F7.4 mag rmag [16.6/26.3]? Pan-Starrs r magnitude
423- 428 F6.4 mag e_rmag [0.0004/0.4]? Uncertainty in rmag
430- 436 F7.4 mag imag [16.1/23.3]? Pan-Starrs i magnitude
438- 443 F6.4 mag e_imag [0/0.5]? Uncertainty in imag
445- 451 F7.4 mag zmag [14.6/21.7]? Pan-Starrs z magnitude
453- 458 F6.4 mag e_zmag [0.0002/0.4]? Uncertainty in zmag
460- 466 F7.4 mag ymag [13.6/21]? Pan-Starrs y magnitude
468- 473 F6.4 mag e_ymag [0.0002/0.4]? Uncertainty in ymag
475- 481 F7.1 mas/yr PS1-pmra [-1855/1038]? Best+ 2018, J/ApJS/234/1,
proper motion in RA
483- 487 F5.1 mas/yr e_PS1-pmra [0.9/116]? Uncertainty in PS1-pmra
489- 495 F7.1 mas/yr PS1-pmdec [-1472/1464]? Best+ 2018, J/ApJS/234/1,
proper motion in DE
497- 500 F4.1 mas/yr e_PS1-pmdec [0.8/92]? Uncertainty in PS1-pmdec
502- 520 A19 --- CWISE CatWISE 2020 designation
522- 532 F11.7 deg RACWdeg ? CatWISE 2020 right ascension
534- 543 F10.7 deg DECWdeg ? CatWISE 2020 declination
545- 550 F6.3 mag W1mag [10.1/19.5]? CatWISE 2020 W1 magnitude
552- 556 F5.3 mag e_W1mag [0/0.5]? Uncertainty in W1mag
558- 563 F6.3 mag W2mag [9.87/16.8]? CatWISE 2020 W2 magnitude
565- 569 F5.3 mag e_W2mag [0.005/0.4]? Uncertainty in w2mag
571- 578 F8.2 mas/yr CW-pmra [-1835/2684]? CatWISE 2020 proper motion
in RA
580- 584 F5.1 mas/yr e_CW-pmra [2/122]? Uncertainty in CWISE-pmra
586- 593 F8.2 mas/yr CW-pmdec [-2246/1453]? CatWISE 2020 proper motion
in DE
595- 599 F5.1 mas/yr e_CW-pmdec [2/148]? Uncertainty in CWISE-pmdec
601- 609 F9.3 mas/yr O-pmra [-1856/2563] Optimal proper motion in RA
611- 616 F6.3 mas/yr e_O-pmra [0.1/100] Uncertainty in O-pmra
618- 626 F9.3 mas/yr O-pmdec [-2220/1465] Optimal proper motion in DE
628- 634 F7.3 mas/yr e_O-pmdec [0.08/116] Uncertainty in O-pmdec
636- 638 I3 --- r_O-pm [9/155] Reference for optimal proper motion
640- 647 F8.4 mas O-plx [5.08/215]? Optimal parallax
649- 655 F7.4 mas e_O-plx [0.01/13]? Uncertainty in O-plx
657- 659 I3 --- r_O-plx [10/155]? Reference for optimal parallax
661- 672 A12 --- Flag Flag (3)
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Note (1): 2MASS J16094569+1426422 is a misprint for the object
2MASS J16095469+1426422 (the misprint is also propagated
in 2015AJ....150..182K 2015AJ....150..182K); note added by CDS.
Note (2): The positions, and UHS J- and K-band photometry for objects in this
sample pulled directly from UHS DR2 (Bruursema et al. 2023, in preparation).
Note (3): Flags as follows:
1 = young or suggested to be young;
2 = subdwarf;
3 = visual binary;
4 = Hyades member or candidate member;
5 = red near-infrared spectrum;
6 = spectral binary;
7 = wide companion;
8 = peculiar spectrum;
9 = uncertain spectral type;
10 = poor or contaminated CatWISE 2020 photometry;
11 = poor or contaminated Pan-STARRS photometry;
12 = blue near-infrared spectrum;
13 = Gaia RUWE≥1.4;
14 = photometry from CatWISE 2020 reject catalog;
15 = Parallax given is from co-moving companion.
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Ref [1/157] Reference code
5- 29 A25 --- Auth Main author
31- 49 A19 --- BibCode BibCode of the reference
51- 66 A16 --- Cat Catalog reference in VizieR
68- 76 A9 --- Note Additional note
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History:
From electronic version of the journal
* 11-Sep-2024:Insert into VizieR
* 16-Apr-2025: Modification of table name (A1 as in the paper instead of
13 as in the online MRT file) and coordinates from SIMBAD added.
(End) Prepared by [AAS], Coralie Fix [CDS], 22-Mar-2024