A Brown Dwarf Census from the SIMP Survey

Abstract

We have conducted a near-infrared (NIR) proper motion survey, the Sondage Infrarouge de Mouvement Propre, in order to discover field ultracool dwarfs (UCD) in the solar neighborhood. The survey was conducted by imaging $\sim 28\%$ of the sky with the Caméra PAnoramique Proche-InfraRouge both in the southern hemisphere at the Cerro Tololo Inter-American Observatory 1.5 m telescope, and in the northern hemisphere at the Observatoire du Mont-Mégantic 1.6 m telescope and comparing the source positions from these observations with the Two Micron All-Sky Survey Point Source Catalog (2MASS PSC). Additional color criteria were used to further discriminate unwanted astrophysical sources. We present the results of an NIR spectroscopic follow-up of 169 M, L, and T dwarfs. Among the sources discovered are 2 young field brown dwarfs, 6 unusually red M and L dwarfs, 25 unusually blue M and L dwarfs, 2 candidate unresolved L+T binaries, and 24 peculiar UCDs. Additionally, we add 9 L/T transition dwarfs (L6--T4.5) to the already known objects.

85 pages, 9 figures. Accepted for publication in ApJ

References in corpus (98)

• The Sloan Digital Sky Survey: Technical Summary
• The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
• Validation of the new Hipparcos reduction
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• Intrinsic Colors, Temperatures, and Bolometric Corrections of Pre-Main Sequence Stars
• The SIMBAD astronomical database
• X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
• A Method of Correcting Near-Infrared Spectra for Telluric Absorption
• Precipitating Condensation Clouds in Substellar Atmospheres
• 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
• The UKIDSS Galactic Plane Survey
• Near-Infrared Photometry and Spectroscopy of L and T Dwarfs: the Effects of Temperature, Clouds, and Gravity
• A Unified Near Infrared Spectral Classification Scheme for T Dwarfs
• Stellar SEDs from 0.3-2.5 Microns: Tracing the Stellar Locus and Searching for Color Outliers in SDSS and 2MASS
• 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
• The Mauna Kea Observatories Near-Infrared Filter Set. II. Specifications for a New JHKL'M' Filter Set for Infrared Astronomy
• The First Hundred Brown Dwarfs Discovered by the Wide-field Infrared Survey Explorer (WISE)
• Further Defining Spectral Type "Y" and Exploring the Low-mass End of the Field Brown Dwarf Mass Function
• A Near-Infrared Spectroscopic Study of Young Field Ultracool Dwarfs
• 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
• Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data
• Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5
• The Brown Dwarf Kinematics Project (BDKP) I. Proper Motions and Tangential Velocities for a Large Sample of Late-type M, L and T Dwarfs
• Evidence for Cloud Disruption in the L/T Dwarf Transition
• Discovery of a Very Young Field L Dwarf, 2MASS J01415823-4633574
• The Missing Link: Early Methane ("T") Dwarfs in the Sloan Digital Sky Survey
• BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey
• The Mauna Kea Observatories Near-Infrared Filter Set. I: Defining Optimal 1-5 $\mu$m Bandpasses
• The First Substellar Subdwarf? Discovery of a Metal-poor L Dwarf with Halo Kinematics
• A Method for Determining the Physical Properties of the Coldest Known Brown Dwarfs
• 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 SuperCOSMOS Sky Survey. Paper III: Astrometry
• Binaries and the L Dwarf/T Dwarf Transition
• Subtle Signatures of Multiplicity in Late-type Dwarf Spectra: The Unresolved M8.5 + T5 Binary 2MASS J03202839-0446358
• Discovery of 11 New T Dwarfs in the Two Micron All-Sky Survey, Including a Possible L/T Transition Binary
• Discovery of Two Nearby, Peculiar L Dwarfs from the 2MASS Proper Motion Survey: Young or Metal-Rich?
• VLBA determination of the distance to nearby star-forming regions II. Hubble 4 and HDE 283572 in Taurus
• JHK Observations of Faint Standard Stars in the Mauna Kea Near-Infrared Photometric System
• Colors and Kinematics of L Dwarfs From the Sloan Digital Sky Survey
• The AllWISE Motion Survey and The Quest for Cold Subdwarfs
• Clouds, Gravity and Metallicity in Blue L dwarfs: The Case of 2MASS J11263991-5003550
• JHK Magnitudes for L and T Dwarfs and Infrared Photometric Systems
• A Study of the Diverse T Dwarf Population Revealed by WISE
• 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
• BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups
• Discovery of the brightest T dwarf in the northern hemisphere
• Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. I. DENIS J220002.05-303832.9AB
• Forty seven new T dwarfs from the UKIDSS Large Area Survey
• Discovery of the Young L Dwarf WISE J1741102.78-464225.5
• 2MASS J05185995-2828372: Discovery of an Unresolved L/T Binary
• Doppler Imaging of Exoplanets and Brown Dwarfs
• The Spatial Distribution of Brown Dwarfs in Taurus
• Brown dwarfs and very low mass stars in the Hyades cluster : a dynamically evolved mass function
• A kinematic study of the Taurus-Auriga T association
• A Search for L/T Transition Dwarfs With Pan-STARRS1 and WISE. II. L/T Transition Atmospheres and Young Discoveries
• Wide, Cool and Ultracool Companions to Nearby Stars from Pan-STARRS1
• 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)
• The ultracool-field dwarf luminosity-function and space density from the Canada-France Brown Dwarf Survey
• Spectroscopic characterization of 78 DENIS ultracool dwarf candidates in the solar neighborhood and the Upper Sco OB association
• Nearby young stars selected by proper motion. I. Four new members of the Beta Pictoris moving group from the Tycho-2 catalog
• An Infrared High Proper Motion Survey Using 2MASS and SDSS: Discovery of M, L and T Dwarfs
• Parallaxes of Southern Extremely Cool objects (PARSEC) II: Spectroscopic Follow-up and Parallaxes of 52 Targets
• Discovery of a High Proper Motion L Dwarf Binary: 2MASS J15200224-4422419AB
• A Proper Motion Survey Using the First Sky Pass of NEOWISE-Reactivation Data
• Brown dwarfs in the Hyades and beyond?
• The sub-stellar birth rate from UKIDSS
• A Targeted Search for Peculiarly Red L and T Dwarfs in SDSS, 2MASS, and WISE: Discovery of a Possible L7 Member of the TW Hydrae Association
• A Cross-Match of 2MASS and SDSS. II. Peculiar L Dwarfs, Unresolved Binaries, and the Space Density of T Dwarf Secondaries
• A 2MASS Survey for Brown Dwarfs Towards the Hyades
• Characterization of High Proper Motion Objects from the Wide-field Infrared Survey Explorer
• Ultra-cool dwarfs: new discoveries, proper motions, and improved spectral typing from SDSS and 2MASS photometric colors
• SIMP J2154-1055: A New Low-Gravity L4$\beta$ Brown Dwarf Candidate Member of the Argus Association
• DENIS J081730.0-615520: An overlooked mid-T dwarf in the solar neighborhood
• Discovery of the first wide L dwarf + giant binary system and eight other ultra-cool dwarfs in wide binaries
• WISE/2MASS-SDSS brown dwarfs candidates using Virtual Observatory tools
• Discovery of a Very Low Mass Triple with Late-M and T Dwarf Components: LP 704-48/SDSS J0006-0852AB
• Four new T dwarfs identified in PanSTARRS 1 commissioning data
• A Search for L/T Transition Dwarfs With Pan-STARRS1 and WISE: Discovery of Seven Nearby Objects Including Two Candidate Spectroscopic Variables
• The UKIDSS-2MASS Proper Motion Survey I: Ultracool dwarfs from UKIDSS DR4
• SDSS J125637-022452: a high proper motion L subdwarf
• Spectroscopy of Hyades L dwarf candidates
• Substellar multiplicity in the Hyades cluster
• L dwarfs in the Hyades
• An overlooked brown dwarf neighbour (T7.5 at d~5pc) of the Sun and two additional T dwarfs at about 10pc
• High Resolution Imaging of Very Low Mass Spectral Binaries: Three Resolved Systems and Detection of Orbital Motion in an L/T Transition Binary
• Discovery of two L & T binaries with wide separations and peculiar photometric properties
• High Proper Motion Objects from the UKIDSS Galactic Plane Survey
• UKIDSS detections of cool brown dwarfs - proper motions of 14 known $>$T5 dwarfs and discovery of three new T5.5-T6 dwarfs
• Discovery And Characterization of Wide Binary Systems With a Very Low Mass Component
• Cool carbon stars in the halo and in dwarf galaxies: Halpha, colours, and variabiity
• 2MASS J154043.42-510135.7: a new addition to the 5 pc population
• WISEA J064750.85-154616.4: a new nearby L/T transition dwarf

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• The Factory and the Beehive. IV. A Comprehensive Study of the Rotation X-ray Activity Relation in Praesepe and the Hyades
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