The UKIDSS-2MASS Proper Motion Survey I: Ultracool dwarfs from UKIDSS DR4

Abstract

The UKIRT Infrared Deep Sky Survey (UKIDSS) is the first of a new generation of infrared surveys. Here we combine the data from two UKIDSS components, the Large Area Survey (LAS) and the Galactic Cluster Survey (GCS), with 2MASS data to produce an infrared proper motion survey for low mass stars and brown dwarfs. In total we detect 267 low mass stars and brown dwarfs with significant proper motions. We recover all ten known single L dwarfs and the one known T dwarf above the 2MASS detection limit in our LAS survey area and identify eight additional new candidate L dwarfs. We also find one new candidate L dwarf in our GCS sample. Our sample also contains objects from eleven potential common proper motion binaries. Finally we test our proper motions and find that while the LAS objects have proper motions consistent with absolute proper motions, the GCS stars may have proper motions which are significantly under-estimated. This is due possibly to the bulk motion of some of the local astrometric reference stars used in the proper motion determination.

Accepted for publication in MNRAS

References in corpus (43)

• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Evolutionary models for cool brown dwarfs and extrasolar giant planets. The case of HD 20945
• The Fourth Data Release of the Sloan Digital Sky Survey
• The UKIRT Infrared Deep Sky Survey ZYJHK Photometric System: Passbands and Synthetic Colours
• An Infrared Spectroscopic Sequence of M, L and T Dwarfs
• Astrometry and Photometry for Cool Dwarfs and Brown Dwarfs
• The SuperCOSMOS Sky Survey. Paper I: Introduction and Description
• Sixty-seven Additional L Dwarfs Discovered by the Two Micron All Sky Survey (2MASS)
• Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: the Effects of Temperature, Clouds, and Gravity
• New Neighbors from 2MASS: Activity and Kinematics at the Bottom of the Main Sequence
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• A Unified Near Infrared Spectral Classification Scheme for T Dwarfs
• L' and M' Photometry of Ultracool Dwarfs
• The WFCAM Science Archive
• Preliminary Parallaxes of 40 L and T Dwarfs from the U.S. Naval Observatory Infrared Astrometry Program
• Characterization of M,L and T dwarfs in the Sloan Digital Sky Survey
• The Spectra of T Dwarfs I: Near-Infrared Data and Spectral Classification
• 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 2MASS Wide-Field T Dwarf Search. III. Seven New T Dwarfs and Other Cool Dwarf Discoveries
• Multiplicity of Nearby Free-floating Ultra-cool Dwarfs: a HST-WFPC2 search for companions
• Meeting the Cool Neighbors. IX. The Luminosity Function of M7-L8 Ultracool Dwarfs in the Field
• Infrared Parallaxes for Methane T dwarfs
• Discovery of Two Nearby, Peculiar L Dwarfs from the 2MASS Proper Motion Survey: Young or Metal-Rich?
• L Dwarfs Found in Sloan Digital Sky Survey Commissioning Imaging Data
• A very cool brown dwarf in UKIDSS DR1
• A Cross-Match of 2MASS and SDSS: Newly-Found L and T Dwarfs and an Estimate of the Space Densitfy of T Dwarfs
• Keck Spectra of Brown Dwarf Candidates and a Precise Determination of the Lithium Depletion Boundary in the Alpha Persei Open Cluster
• New High Proper Motion Stars from the Digitized Sky Survey. I. Northern Stars with proper motion between 0.5 and 2.0 arcsec/yr at Low Galactic Latitudes
• Fifteen new T dwarfs discovered in the UKIDSS Large Area Survey
• A wide deep infrared look at the Pleiades with UKIDSS: new constraints on the substellar binary fraction and the low mass IMF
• Southern Infrared Proper Motion Survey I: Discovery of New High Proper Motion Stars From First Full Hemisphere Scan
• The Solar Neighborhood VIII: Discovery of New High Proper Motion Nearby Stars Using the SuperCOSMOS Sky Survey
• A Substellar Mass Function for Alpha Per
• Southern Infrared Proper Motion Survey II: A sample of low mass stars with μ> 0.1''/yr
• New members in the Upper Sco association from the UKIDSS Early Data Release
• New High Proper Motion Stars from the Digitized Sky Survey. IV. Completion of the Southern Survey and 170 Additional Stars with pm>0.45 arcsec/yr
• L Dwarfs Found in Sloan Digital Sky Survey Commissioning Data II. Hobby-Eberly Telescope Observations
• The Liverpool-Edinburgh High Proper Motion Survey
• New neighbours VI. Spectroscopy of DENIS nearby stars candidates
• Spectroscopic distances of nearby ultracool dwarfs
• The Solar Neighborhood. XVIII. Discovery of new proper motion stars with 0.40 arcsec yr^-1 > mu >= 0.18 arcsec yr^-1 between declinations -90 degrees and -47 degrees
• Meeting the Cool Neighbours, VI: A search for nearby ultracool dwarfs in the Galactic Plane

Cited by in corpus (30)

• VISTA Variables in the Via Lactea (VVV): The public ESO near-IR variability survey of the Milky Way
• Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data
• BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups With Previously Known Signs of Youth
• Low-Mass Tertiary Companions to Spectroscopic Binaries I: Common Proper Motion Survey for Wide Companions using 2MASS
• Discovery of a ~250 K Brown Dwarf at 2 pc from the Sun
• Discovery of a Binary Brown Dwarf at 2 Parsecs from the Sun
• The Solar Neighborhood XXXV: Distances to 1404 M Dwarf Systems Within 25 pc in the Southern Sky
• SpeX Spectroscopy of Unresolved Very Low Mass Binaries. II. Identification of Fourteen Candidate Binaries with Late-M/Early-L and T Dwarf Components
• Photometry and Proper Motions of M, L, and T Dwarfs from the Pan-STARRS1 3$\pi$ Survey
• Wide, Cool and Ultracool Companions to Nearby Stars from Pan-STARRS1
• A Proper Motion Survey Using the First Sky Pass of NEOWISE-Reactivation Data
• The Ultracool SpeXtroscopic Survey. I. Volume-Limited Spectroscopic Sample and Luminosity Function of M7$-$L5 Ultracool Dwarfs
• Characterization of High Proper Motion Objects from the Wide-field Infrared Survey Explorer
• Discovery of the first wide L dwarf + giant binary system and eight other ultra-cool dwarfs in wide binaries
• Towards a complete stellar mass function of the Hyades. I. Pan-STARRS1 optical observations of the low-mass stellar content
• Hubble Space Telescope Observations of Field Ultracool Dwarfs at High Galactic Latitude
• Four new T dwarfs identified in PanSTARRS 1 commissioning data
• A Brown Dwarf Census from the SIMP Survey
• A Pan-STARRS1 study of the relationship between wide binarity and planet occurrence in the Kepler field
• One more neighbor: The first brown dwarf in the VVV survey
• A 1500 deg${}^2$ Near Infrared Proper Motion Catalogue from the UKIDSS Large Area Survey
• Hunting The Most Distant Stars in the Milky Way: Methods and Initial Results
• A new free-floating planet in the Upper Scorpius association
• A Global Correction to PPMXL Proper Motions
• Sample of LMXBs in the Galactic bulge. I. Optical and near-infrared constraints from the Virtual Observatory
• M dwarfs in the b201 tile of the VVV survey: Colour-based Selection, Spectral Types and Light Curves
• The Solar Neighborhood. XLIII: Discovery of New Nearby Stars with pm < 0.18 arcsec yr-1 (TINYMO sample)
• Spectro-photometric characterization of high proper motion sources from WISE
• The Brown Dwarf Kinematics Project (BDKP). II. Details on Nine Wide Common Proper Motion Very Low-Mass Companions to Nearby Stars
• The Future of Stellar Populations Studies in the Milky Way and the Local Group