Characterization of M,L and T dwarfs in the Sloan Digital Sky Survey

Abstract

An extensive sample of M, L and T dwarfs identified in the Sloan Digital Sky Survey (SDSS) has been compiled. The sample of 718 dwarfs includes 677 new objects (629 M dwarfs, 48 L dwarfs) together with 41 that have been previously published. All new objects and some of the previously published ones have new optical spectra obtained either with the SDSS spectrographs or with the Apache Point Observatory 3.5m ARC telescope. Spectral types and SDSS colors are available for all objects; approximately 35% also have near-infrared magnitudes measured by 2MASS or on the Mauna Kea system. We use this sample to characterize the color--spectral type and color--color relations of late type dwarfs in the SDSS filters, and to derive spectroscopic and photometric parallax relations for use in future studies of the luminosity and mass functions based on SDSS data. We find that the (i*-z*) and (i*-J) colors provide good spectral type and absolute magnitude (M_i*) estimates for M and L dwarfs. Our distance estimates for the current sample indicate that SDSS is finding early M dwarfs out to about 1.5 kpc, L dwarfs to approximately 100 pc and T dwarfs to near 20 pc. The T dwarf photometric data show large scatter and are therefore less reliable for spectral type and distance estimation.

46 pages, 14 figures (24 pages of figures), Accepted for publication in the Astronomical Journal

References in corpus (8)

• The u'g'r'i'z' Standard Star Network
• A photometricity and extinction monitor at the Apache Point Observatory
• Towards Spectral Classification of L and T Dwarfs: Infrared and Optical Spectroscopy and Analysis
• The Spectra of T Dwarfs I: Near-Infrared Data and Spectral Classification
• Infrared Photometry of Late-M, L, and T Dwarfs
• JHK Standard Stars for Large Telescopes: the UKIRT Fundamental and Extended Lists
• The Solar Neighborhood VI: New Southern Stars Identified by Optical Spectroscopy
• L Dwarfs Found in Sloan Digital Sky Survey Commissioning Data II. Hobby-Eberly Telescope Observations

Cited by in corpus (302)

• The Sixth Data Release of the Sloan Digital Sky Survey
• Constraining the Age-Activity Relation for Cool Stars: The SDSS DR5 Low-Mass Star Spectroscopic Sample
• The Hawaii Infrared Parallax Program. I. Ultracool Binaries and the L/T Transition
• Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: the Effects of Temperature, Clouds, and Gravity
• The SEGUE Stellar Parameter Pipeline. I. Description and Initial Validation Tests
• L' and M' Photometry of Ultracool Dwarfs
• Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
• Preliminary Parallaxes of 40 L and T Dwarfs from the U.S. Naval Observatory Infrared Astrometry Program
• Design Considerations for a Ground-based Transit Search for Habitable Planets Orbiting M dwarfs
• Meeting the Cool New Neighbors V: A 2MASS-Selected Sample of Ultracool Dwarfs
• A Catalog of Northern Stars With Annual Proper Motions Larger Than 0.15 Seconds of Arc (LSPM catalog - North)
• The 0.8-14.5 micron Spectra of Mid-L to Mid-T Dwarfs: Diagnostics of Effective Temperature, Grain Sedimentation, Gas Transport, and Surface Gravity
• Fundamental Parameters and Spectral Energy Distributions of Young and Field Age Objects with Masses Spanning the Stellar to Planetary Regime
• The Luminosity and Mass Functions of Low-Mass Stars in the Galactic Disk: II. The Field
• A Near-Infrared Spectroscopic Study of Young Field Ultracool Dwarfs
• A Re-appraisal of the Habitability of Planets Around M Dwarf Stars
• Spectroscopic Properties of Cool Stars in the SDSS: An Analysis of Magnetic Activity and a Search for Subdwarfs
• The 2MASS Wide-Field T Dwarf Search. III. Seven New T Dwarfs and Other Cool Dwarf Discoveries
• Seventy-One New L and T Dwarfs from the Sloan Digital Sky Survey
• The Sloan Digital Sky Survey Data Release 7 Spectroscopic M Dwarf Catalog I: Data
• Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data
• Low-Mass Dwarf Template Spectra from the Sloan Digital Sky Survey
• Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field
• The Brown Dwarf Kinematics Project (BDKP) I. Proper Motions and Tangential Velocities for a Large Sample of Late-type M, L and T Dwarfs
• Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs
• A Spectroscopic Catalog of the Brightest (J<9) M Dwarfs in the Northern Sky
• Population Properties of Brown Dwarf Analogs to Exoplanets
• UV/Optical Detections of Candidate Tidal Disruption Events by GALEX and CFHTLS
• Theoretical isochrones in several photometric systems II. The Sloan Digital Sky Survey ugriz system
• The Hawaii Infrared Parallax Program. II. Young Ultracool Field Dwarfs
• Radio Observations of a Large Sample of Late-M, L, and T Dwarfs: The Distribution of Magentic Field Strengths
• A Sample of Very Young Field L Dwarfs and Implications for the Brown Dwarf "Lithium Test" at Early Ages
• Low-Mass Tertiary Companions to Spectroscopic Binaries I: Common Proper Motion Survey for Wide Companions using 2MASS
• BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey
• Automatic Determination of Stellar Atmospheric Parameters and Construction of Stellar Spectral Templates of the Guoshoujing Telescope (LAMOST)
• Strong Brightness Variations Signal Cloudy-to-Clear Transition of Brown Dwarfs
• Hubble Space Telescope Observations of Binary Very-Low-Mass Stars and Brown Dwarfs
• Identifying the Young Low-mass Stars within 25 pc. I. Spectroscopic Observations
• Activity and Kinematics of Ultracool Dwarfs Including An Amazing Flare Observation
• Spitzer/IRAC Photometry of M, L, and T Dwarfs
• Prospecting in late-type dwarfs: a calibration of infrared and visible spectroscopic metallicities of late-K and M dwarfs spanning 1.5 dex
• CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS
• Spectroscopy of New High Proper Motion Stars in the Northern Sky. I. New Nearby Stars, New High Velocity Stars, and an Enhanced Classification Scheme for M Dwarfs
• Mid-Infrared Photometry of Cold Brown Dwarfs: Diversity in Age, Mass and Metallicity
• Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
• Optical Spectroscopy of the Surface Population of the rho Ophiuchi Molecular Cloud: The First Wave of Star Formation
• The Field Substellar Mass Function Based on the Full-sky 20-pc Census of 525 L, T, and Y Dwarfs
• Lyman Break Galaxies and the Star Formation Rate of the Universe at z~6
• Discovery of 11 New T Dwarfs in the Two Micron All-Sky Survey, Including a Possible L/T Transition Binary
• CARMENES input catalogue of M dwarfs V. Luminosities, colours, and spectral energy distributions
• Colors and Kinematics of L Dwarfs From the Sloan Digital Sky Survey
• 2MASSJ035523.51+113337.4: A Young, Dusty, Nearby, Isolated Brown Dwarf Resembling A Giant Exoplanet
• A search for binary systems among the nearest L dwarfs
• Clouds, Gravity and Metallicity in Blue L dwarfs: The Case of 2MASS J11263991-5003550
• The Great Observatories Origins Deep Survey - VLT/ISAAC Near-Infrared Imaging of the GOODS-South Field
• A Cross-Match of 2MASS and SDSS: Newly-Found L and T Dwarfs and an Estimate of the Space Densitfy of T Dwarfs
• SpeX Spectroscopy of Unresolved Very Low Mass Binaries. II. Identification of Fourteen Candidate Binaries with Late-M/Early-L and T Dwarf Components
• Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime
• The WIRED Survey II: Infrared Excesses in the SDSS DR7 White Dwarf Catalog
• BANYAN. XIII. A First Look at Nearby Young Associations with Gaia Data Release 2
• Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3$\pi$ Survey
• HST imaging and Keck Spectroscopy of z~6 I-band Drop-Out Galaxies in the ACS GOODS Fields
• The Stellar Mass Density at z~6 from Spitzer Imaging of i-drop Galaxies
• A Flaring L5 Dwarf: The Nature of HαEmission in Very Low Mass (Sub)Stellar Objects
• Stellar Locus Regression: Accurate Color Calibration, and the Real-time Determination of Galaxy Cluster Photometric Redshifts
• Cool Young Stars in the Northern Hemisphere: Beta Pictoris and AB Doradus Moving Group Candidates
• A Survey for Circumstellar Disks Around Young Substellar Objects
• An empirical template library of stellar spectra for a wide range of spectral classes, luminosity classes, and metallicities using SDSS BOSS spectra
• The CARMENES search for exoplanets around M dwarfs. Activity indicators at visible and near-infrared wavelengths
• The Magnetic Properties of an L Dwarf Derived from Simultaneous Radio, X-ray, and H-alpha Observations
• Discovery of a Highly Unequal-Mass Binary T Dwarf with Keck Laser Guide Star Adaptive Optics: A Coevality Test of Substellar Theoretical Models and Effective Temperatures
• Optical Spectroscopy of 2MASS Color-Selected Ultracool Subdwarfs
• SPECULOOS -- Ultracool Dwarf Transit Survey: Target List and Strategy
• Finding benchmark brown dwarfs to probe the IMF as a function of time
• A Volume-Limited Sample of Ultracool Dwarfs. I. Construction, Space Density, and a Gap in the L/T Transition
• The Luminosity and Mass Functions of Low-Mass Stars in the Galactic Disk: I. The Calibration Region
• Kelu-1 is a Binary L Dwarf: First Brown Dwarf Science from Laser Guide Star Adaptive Optics
• Doppler Imaging of Exoplanets and Brown Dwarfs
• The 2MASS Wide-Field T Dwarf Search. I. Discovery of a Bright T Dwarf Within 10 pc of the Sun
• The young population of the Chamaeleon II dark cloud
• Discovery of very nearby ultracool dwarfs from DENIS
• New Low Accretion-Rate Magnetic Binary Systems and their Significance for the Evolution of Cataclysmic Variables
• Discovery of a protocluster at z~6
• The Solar Neighborhood IX: Hubble Space Telescope Detections of Companions to Five M and L Dwarfs within 10 pc of the Sun
• Sloan Digital Sky Survey Imaging of Low Galactic Latitude Fields: Technical Summary and Data Release
• The AllWISE Motion Survey, Part 2
• A large spectroscopic sample of L and T dwarfs from UKIDSS LAS: peculiar objects, binaries, and space density
• Measuring the evolution of the most stable optical clock G 117-B15A
• Exploring the Local Milky Way: M Dwarfs as Tracers of Galactic Populations
• The star formation in the L1615/L1616 cometary cloud
• Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph. II. Emergence and Sedimentation of Silicate Clouds in L Dwarfs, and Analysis of the Full M5--T9 Field Dwarf Spectroscopic Sample
• A Second Stellar Color Locus: a Bridge from White Dwarfs to M stars
• Finding ultracool brown dwarfs with MegaCam on CFHT: method and first results
• Nearby M, L, and T Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)
• An independent analysis of the brown dwarf atmosphere monitoring (BAM) data: large-amplitude variability is rare outside the L/T transition
• The Brown dwarf Atmosphere Monitoring (BAM) Project I: The largest near-IR monitoring survey of L- & T-dwarfs
• Multiplicity and Optical Excess Across the Substellar Boundary in Taurus
• Exploring the age dependent properties of M and L dwarfs using Gaia and SDSS
• The Mass of HD 38529 c from Hubble Space Telescope Astrometry and High-Precision Radial Velocities
• The Hawaii Infrared Parallax Program. IV. A Comprehensive Parallax Survey of L0-T8 dwarfs with UKIRT
• A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)
• Spectroscopic characterization of 78 DENIS ultracool dwarf candidates in the solar neighborhood and the Upper Sco OB association
• An Infrared High Proper Motion Survey Using 2MASS and SDSS: Discovery of M, L and T Dwarfs
• Optical Linear Polarization of Late M- and L-Type Dwarfs
• The Initial Mass Function and Disk Frequency of the Rho Ophiuchi Cloud: An Extinction-Limited Sample
• Using the Galactic Dynamics of M7 Dwarfs to Infer the Evolution of Their Magnetic Activity
• The Chromospheric Activity and Ages of M Dwarf Stars in Wide Binary Systems
• Parallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets
• Thirty New Low-Mass Spectroscopic Binaries
• Discovery of a Young L Dwarf Binary, SDSS J224953.47+004404.6AB
• Discovery of a High Proper Motion L Dwarf Binary: 2MASS J15200224-4422419AB
• Contamination by field late-M, L and T dwarfs in deep surveys
• Parallaxes of Southern Extremely Cool objects - I: Targets, Proper motions and first results
• Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging
• Optical Spectroscopic Classification and Membership of Young M Dwarfs in Star-Forming Regions
• LHS 2803B: A very wide mid-T dwarf companion to an old M dwarf identified from Pan-STARRS1
• NPARSEC: NTT Parallaxes of Southern Extremely Cool objects. Goals, targets, procedures and first results
• A three dimensional extinction map of the Galactic Anticentre from multi-band photometry
• Speckle Imaging Excludes Low-Mass Companions Orbiting the Exoplanet Host Star TRAPPIST-1
• Multiplicity at the Stellar/Substellar Boundary in Upper Scorpius
• Surface Gravities for 228 M, L, and T Dwarfs in the NIRSPEC Brown Dwarf Spectroscopic Survey
• A precision study of two eclipsing white dwarf plus M dwarf binaries
• Proper motion L and T dwarf candidate members of the Pleiades
• New Close Binary Systems from the SDSS-I (Data Release Five) and the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems
• The Gaia Ultracool Dwarf Sample. I. Known L and T dwarfs and the first Gaia data release
• New atmospheric parameters and spectral interpolator for the MILES cool stars
• The Ultracool SpeXtroscopic Survey. I. Volume-Limited Spectroscopic Sample and Luminosity Function of M7$-$L5 Ultracool Dwarfs
• Discovery of the Coolest Extreme Subdwarf
• SDSS J080531.84+481233.0: An Unresolved L Dwarf/T Dwarf Binary
• Discovery of An Unusually Blue L Dwarf Within 10 pc of the Sun
• Spitzer Follow-up of Extremely Cold Brown Dwarfs Discovered by the Backyard Worlds: Planet 9 Citizen Science Project
• Testing the Metal of Late-Type Kepler Planet Hosts with Iron-Clad Methods
• The substellar companion in the eclipsing white dwarf binary SDSS J141126.20+200911.1
• Extragalactic fast X-ray transient candidates discovered by Chandra (2000-2014)
• The sub-stellar birth rate from UKIDSS
• Photometric brown-dwarf classification. II. A homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 with accurate spectral types
• A Cross-Match of 2MASS and SDSS. II. Peculiar L Dwarfs, Unresolved Binaries, and the Space Density of T Dwarf Secondaries
• Discovery of a nearby L-T transition object in the Southern Galactic plane
• Characterization of High Proper Motion Objects from the Wide-field Infrared Survey Explorer
• Proper motions of field L and T dwarfs
• Discovery of an ultra-cool subdwarf: LSR1425+7102, first star with spectral type sdM8.0
• Disentangling Time Series Spectra with Gaussian Processes: Applications to Radial Velocity Analysis
• Variable Faint Optical Sources Discovered by Comparing POSS and SDSS Catalogs
• New neighbours: V. 35 DENIS late-M dwarfs between 10 and 30 parsecs
• Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors
• The LuckyCam Survey for Very Low Mass Binaries II: 13 new M4.5-M6.0 Binaries
• Cool Customers in the Stellar Graveyard II: Limits to Substellar Objects Around Nearby DAZ White Dwarfs
• Cool Companions to White Dwarfs from the 2MASS Second Incremental Data Release
• The shortest period detached white dwarf + main-sequence binary
• Two Rare Magnetic Cataclysmic Variables with Extreme Cyclotron Features Identified in the Sloan Digital Sky Survey
• The Dawes Review 3: The Atmospheres of Extrasolar Planets and Brown Dwarfs
• Cool Companions to White Dwarf Stars from the Two Micron All Sky Survey All Sky Data Release
• Discovery of the first wide L dwarf + giant binary system and eight other ultra-cool dwarfs in wide binaries
• The discovery of a significant sample of massive galaxies at redshifts 5 < z < 6 in the UKIDSS Ultra Deep Survey Early Data Release
• New neighbours VI. Spectroscopy of DENIS nearby stars candidates
• Discovery of a 66 mas Ultracool Binary with Laser Guide Star Adaptive Optics
• The Subdwarf Luminosity Function
• A New Detached M Dwarf Eclipsing Binary
• Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. II. 2MASS J 17072343-0558249AB
• WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools
• K2-137 b: an Earth-sized planet in a 4.3-hour orbit around an M-dwarf
• Constraining the Distribution of L- & T-Dwarfs in the Galaxy
• Optical Counterparts of Ultra Luminous X-ray Sources
• Periodic Variability of Low-Mass Stars in SDSS Stripe 82
• A New Brown Dwarf Desert? A Scarcity of Wide Ultracool Binaries
• Hubble Space Telescope Observations of Field Ultracool Dwarfs at High Galactic Latitude
• SSSPMJ0829-1309: A new nearby L dwarf detected in SuperCOSMOS Sky Surveys
• Optical Counterparts of Ultraluminous X-Ray Sources
• Discovery of a Very Low Mass Triple with Late-M and T Dwarf Components: LP 704-48/SDSS J0006-0852AB
• A Search for Photometric Variability in L and T type Brown Dwarf Atmospheres
• Primeval very low-mass stars and brown dwarfs - IV. New L subdwarfs, Gaia astrometry, population properties, and a blue brown dwarf binary
• Four new T dwarfs identified in PanSTARRS 1 commissioning data
• Candidate Disk Wide Binaries in the Sloan Digital Sky Survey
• Twins: The Two Shortest Period Non-Interacting Double Degenerate White Dwarf Stars
• A Brown Dwarf Census from the SIMP Survey
• Discovery of the Widest Very Low Mass Field Binary
• Update on the Nature of Virgo Overdensity
• A Limit on the Number of Isolated Neutron Stars Detected in the ROSAT Bright Source Catalog
• Extragalactic FXT Candidates Discovered by Chandra (2014-2022)
• Two Additions to the New Class of Low Accretion-Rate Magnetic Binaries
• On Contamination and Completeness in z>5 Lyman Break Galaxy Surveys
• Detectability of Transiting Jupiters and Low-Mass Eclipsing Binaries in Sparsely Sampled Pan-STARRS-1 Survey Data
• The UKIDSS-2MASS Proper Motion Survey I: Ultracool dwarfs from UKIDSS DR4
• The Near-Ultraviolet Luminosity Function of Young, Early M-Type Dwarf Stars
• SDSS J125637-022452: a high proper motion L subdwarf
• Milky Way Red Dwarfs in the BoRG Survey; Galactic scale-height and the distribution of dwarfs stars in WFC3 imaging
• A search for long-timescale, low-frequency radio transients
• The ILIUM forward modelling algorithm for multivariate parameter estimation and its application to derive stellar parameters from Gaia spectrophotometry
• Spectroscopy of Hyades L dwarf candidates
• First T dwarfs in the VISTA Hemisphere Survey
• GTC Osiris spectroscopic identification of a faint L subdwarf in the UKIRT Infrared Deep Sky Survey
• Serendipitous discovery of seven new southern L-dwarfs
• Ultracool Dwarfs Observed with the Spitzer Infrared Spectrograph -- III. Dust Grains in Young L Dwarf Atmospheres Are Heavier
• Identifying Ultra-Cool Dwarfs at Low Galactic Latitudes: A Southern Candidate Catalogue
• An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc
• Discovery of Four High Proper Motion L Dwarfs, Including a 10 pc L Dwarf at the L/T Transition
• Optical spectroscopy of high proper motion stars: new M dwarfs within 10 pc and the closest pair of subdwarfs
• High Resolution Imaging of Very Low Mass Spectral Binaries: Three Resolved Systems and Detection of Orbital Motion in an L/T Transition Binary
• Warm Dust around Cool Stars: Field M Dwarfs with WISE 12 or 22 Micron Excess Emission
• A new strongly X-ray flaring M9 dwarf in the solar neighborhood
• A Reanalysis of the Fundamental Parameters and Age of TRAPPIST-1
• Mapping the Local Halo: Statistical Parallax Analysis of SDSS Low-Mass Subdwarfs
• Unravelling the Puzzle of the Eclipsing Polar SDSSJ 015543.40+002807.2 with XMM and Optical Photometry/Spectropolarimetry
• New ultracool subdwarfs identified in large-scale surveys using Virtual Observatory tools: II. SDSS DR7 vs UKIDSS LAS DR6, SDSS DR7 vs UKIDSS LAS DR8, SDSS DR9 vs UKIDSS LAS DR10, and SDSS DR7 vs 2MASS
• Stellar populations in the CFHTLS. I. New constraints on the IMF at low mass
• The very low mass multiple system LHS\,1070 -- a testbed for model atmospheres for the lower end of the main sequence
• The Surface Densities of Disk Brown Dwarfs in JWST Surveys
• A 1500 deg${}^2$ Near Infrared Proper Motion Catalogue from the UKIDSS Large Area Survey
• High-resolution Imaging of Transiting Extrasolar Planetary systems (HITEP). II. Lucky Imaging results from 2015 and 2016
• Extremely faint high proper motion objects from SDSS stripe 82 - Optical classification spectroscopy of about 40 new objects
• Parallaxes of five L Dwarfs with a Robotic Telescope
• K2 Ultracool Dwarfs Survey I: Photometry of an L Dwarf Superflare
• The Orbit of the L dwarf + T dwarf Spectral Binary SDSS J080531.84+481233.0
• Candidate spectroscopic binaries in the Sloan Digital Sky Survey
• Lucky Imaging of M subdwarfs
• Rotation periods and photometric variability of rapidly rotating ultra-cool dwarfs
• The Sloan Digital Sky Survey
• CatNorth: An Improved Gaia DR3 Quasar Candidate Catalog with Pan-STARRS1 and CatWISE
• An L0 dwarf companion in the brown dwarf desert, at 30 AU
• The Collapse of the Wien Tail in the Coldest Brown Dwarf? Hubble Space Telescope Near-Infrared Photometry of WISE J085510.83-071442.5
• The Dark Energy Survey: Prospects for Resolved Stellar Populations
• UCAC4 Nearby Star Survey: A Search for Our Stellar Neighbors
• Finding cool subdwarfs using a V-J reduced proper-motion diagram: Stellar parameters for 91 candidates
• High spatial resolution optical imaging of the multiple T Tauri system LkHα 262/LkHα 263
• A Limit on the Number Density of Bright z~7 Galaxies
• PSYM-WIDE: a survey for large-separation planetary-mass companions to late spectral type members of young moving groups
• K2-288Bb: A Small Temperate Planet in a Low-mass Binary System Discovered by Citizen Scientists
• The Late-Type Extension to MoVeRS (LaTE-MoVeRS): Proper motion verified low-mass stars and brown dwarfs from SDSS, 2MASS, and WISE
• The fast transient sky with Gaia
• Parallaxes of southern extremely cool objects III: 118 L \& T dwarfs
• Calibrating Ultracool Dwarfs: Optical Template Spectra, Bolometric Corrections, and $\chi$ Values
• Ultracool Field Brown Dwarf Candidates Selected at 4.5 microns
• Search for z~7 Ly-alpha emitters with Suprime-Cam at the Subaru Telescope
• WEIRD: Wide-orbit Exoplanet search with InfraRed Direct imaging
• Ultracool dwarfs in Gaia DR3
• Sloan/Johnson-Cousins/2MASS Color Transformations for Cool-Stars
• Identifying nearby field T dwarfs in the UKIDSS Galactic Clusters Survey
• The ultracool helium-atmosphere white dwarf companion of PSR J0740+6620?
• Discovery And Characterization of Wide Binary Systems With a Very Low Mass Component
• Photometric Selection of z~5 Lyman Break Galaxies in the ESO Remote Galaxy Survey
• GTC OSIRIS z-band imaging of Y dwarfs
• Low Mass Stars and Brown Dwarfs in Praesepe
• The Size and Shape of the Milky Way Disk and Halo from M-type Brown Dwarfs in the BoRG Survey
• M-Dwarfs at Large Heliocentric Distances
• An Empirical Template Library for FGK and Late--type A Stars Using LAMOST Observed Spectra
• Searching for planetary-mass T-dwarfs in the core of Serpens
• Characterization of the known T type dwarfs towards the Sigma Orionis cluster
• The Color Selection of Quasars from Redshifts 5 to 10: Cloning and Discovery
• Motion Verified Red Stars (MoVeRS): A Catalog of Proper Motion Selected Low-mass Stars from WISE, SDSS, and 2MASS
• A Method for Selecting M dwarfs with an Increased Likelihood of Unresolved Ultra-cool Companionship
• Discovery of wide low and very low-mass binary systems using Virtual Observatory tools
• White Dwarfs with Infrared Excess from LAMOST Data Release 5
• Discovery of a nearby young brown dwarf binary candidate
• Astrometric orbits of spectral binary brown dwarfs I: Massive T dwarf companions to 2M1059$-$21 and 2M0805$+$48
• Optical Spectra of Ultracool Dwarfs with the Southern African Large Telescope
• Search for bright nearby M dwarfs with Virtual Observatory tools
• New brown dwarf companions to dM(e) stars
• Improved Photometric Calibrations for Red Stars Observed with the SDSS Photometric Telescope
• The SRG/eROSITA All-Sky Survey: X-ray beacons at late cosmic dawn
• The first spectroscopically identified L dwarf in Praesepe
• The WIRED Survey III: An Infrared Excess around the Eclipsing Post-Common Envelope Binary SDSS J030308.35+005443.7
• Proper motions of field L and T dwarfs -II
• 2MASS J154043.42-510135.7: a new addition to the 5 pc population
• An IPHAS-based search for accreting very low-mass objects using VO tools
• Identifying High Metallicity M Giants at Intragroup Distances with SDSS
• M dwarfs in the b201 tile of the VVV survey: Colour-based Selection, Spectral Types and Light Curves
• The Discovery of an X-ray/UV Stellar Flare from the Late-K/Early-M Dwarf LMC 335
• PSR B0656+14: the unified outlook from the infrared to X-rays
• A homogeneous sample of 34 000 M7-M9.5 dwarfs brighter than $J$=17.5 with accurate spectral types
• Measuring the undetectable: Proper motions and parallaxes of very faint sources
• Spectroscopic distances of 28 nearby star candidates
• Euclid Quick Data Release (Q1) -- Spectroscopic search, classification and analysis of ultracool dwarfs in the Deep Fields
• Collisions of Terrestrial Worlds: The Occurrence of Extreme Mid-Infrared Excesses around Low-Mass Field Stars
• Discovery and Characterization of an Extremely Deep-Eclipsing Cataclysmic Variable: LSQ172554.8-643839
• L dwarfs detection from SDSS images using improved Faster R-CNN
• Proper motions of Upper Sco T-type candidates
• The Intermediate-band Dropout Method: A New Method to Search for High-Redshift Galaxies
• Sample of Cataclysmic Variables from 400d X-ray Survey
• Discovery of a Possible Cool White Dwarf Companion from the AllWISE Motion Survey
• Near-Infrared Imaging of White Dwarfs with Candidate Debris Disks
• Testing the existence of optical linear polarization in young brown dwarfs
• The magnetically-active, low-mass, triple system WDS 19312+3607
• Spitzer Observations of Var Her 04: Possible Detection of Dust Formation in a Super-Outbursting TOAD
• Large Scale Searches for Brown Dwarfs and Free-Floating Planets
• Orbital Separation Amplification in Fragile Binaries with Evolved Components
• M Subdwarf Research III. Spectroscopic Diagnostics for Breaking Parameter Degeneracy
• Near-infrared spectroscopic characterisation of Gaia ultra-cool dwarf candidates; Spectral types and peculiarities
• Using Magnetic Activity and Galactic Dynamics to Constrain the Ages of M Dwarfs
• Detection and characterisation of two VLM binaries: LP 1033-31 and LP 877-72
• The Brown Dwarf Kinematics Project (BDKP). V. Radial and Rotational Velocities of T Dwarfs from Keck/NIRSPEC High-Resolution Spectroscopy
• The Brown Dwarf Kinematics Project (BDKP). II. Details on Nine Wide Common Proper Motion Very Low-Mass Companions to Nearby Stars
• Spectral analysis of 636 white dwarf - M star binaries from the Sloan Digital Sky Survey
• The Gaia Ultracool Dwarf Sample -- IV. GTC/OSIRIS optical spectra of Gaia late-M and L dwarfs
• Spectroscopic and Photometric Observations of Unidentified Ultraviolate Variable Objects in GUVV-2 Catalog
• The Sloan Digital Sky Survey DR7 Spectroscopic M Dwarf Catalog II: Statistical Parallax Analysis
• Hot Subdwarfs in Resolved Binaries
• SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition
• Proper motions with Subaru II. A sample in the Subaru/XMM-Newton Deep Survey field
• Disentangling the Signatures of Blended-Light Atmospheres in L/T Transition Brown Dwarfs
• Chromospheric variabilities of M active stars based on Guoshoujing Telescope
• Using Old and New Approaches: Determining Physical Properties of Brown Dwarfs with Empirical Relations and Machine Learning Models
• Exploring the Variable Sky with the Sloan Digital Sky Survey