The LuckyCam Survey for Very Low Mass Binaries II: 13 new M4.5-M6.0 Binaries

Abstract

We present results from a high-angular-resolution survey of 78 very low mass (VLM) binary systems with 6.0 <= V-K colour <= 7.5 and proper motion >= 0.15 arcsec/yr. 21 VLM binaries were detected, 13 of them new discoveries. The new binary systems range in separation between 0.18 arcsec and 1.3 arcsec. The distance-corrected binary fraction is 13.5% (+6.5%/-4%), in agreement with previous results. 9 of the new binary systems have orbital radii > 10 AU, including a new wide VLM binary with 27 AU projected orbital separation. One of the new systems forms two components of a 2300 AU separation triple system. We find that the orbital radius distribution of the binaries with V-K < 6.5 in this survey appears to be different from that of redder (lower-mass) objects, suggesting a possible rapid change in the orbital radius distribution at around the M5 spectral type. The target sample was also selected to investigate X-ray activity among VLM binaries. There is no detectable correlation between excess X-Ray emission and the frequency and binary properties of the VLM systems.

arXiv comment11 pages, 8 figures. Submitted to MNRAS

References in corpus (31)

• The Formation of Brown Dwarfs as Ejected Stellar Embryos
• Characterization of M,L and T dwarfs in the Sloan Digital Sky Survey
• Binarity in Brown Dwarfs: T Dwarf Binaries Discovered with the Hubble Space Telescope WPFC2
• A Catalog of Northern Stars With Annual Proper Motions Larger Than 0.15 Seconds of Arc (LSPM catalog - North)
• Detection of Nine M8.0-L0.5 Binaries: The Very Low Mass Binary Population and its Implications for Brown Dwarf and VLM Star Formation
• Multiplicity of Nearby Free-floating Ultra-cool Dwarfs: a HST-WFPC2 search for companions
• The Formation of Close Binary Systems by Dynamical Interactions and Orbital Decay
• Lucky Imaging: High Angular Resolution Imaging in the Visible from the Ground
• Improved Astrometry and Photometry for the Luyten Catalog. II. Faint Stars and the Revised Catalog
• Hubble Space Telescope Observations of Binary Very-Low-Mass Stars and Brown Dwarfs
• The Wide Brown Dwarf Binary Oph 1622-2405 and Discovery of A Wide, Low Mass Binary in Ophiuchus (Oph 1623-2402): A New Class of Young Evaporating Wide Binaries?
• A Survey for Spectroscopic Binaries Among Very Low-Mass Stars
• Meeting the Cool Neighbours I: Nearby stars in the NLTT Catalogue - Defining the sample
• Discovery of Two Very Low-Mass Binaries: Final Results of an Adaptive Optics Survey of Nearby M6.0-M7.5 Stars
• X-ray Emission From Nearby M-dwarfs: the Super-saturation Phenomenon
• The Monitor project: Rotation of low-mass stars in the open cluster M34
• A First Look at White Dwarf - M Dwarf Pairs in the Sloan Digital Sky Survey (SDSS)
• On the frequency of close binary systems among very low-mass stars and brown dwarfs
• A Systematic Study Of X-Ray Variability In The ROSAT All-Sky Survey
• The Decay of Accreting Triple Systems as Brown Dwarf Formation Scenario
• Discovery of Five Very Low Mass Close Binaries, Resolved in the Visible with Lucky Imaging
• Rotation and activity in the solar-metallicity open cluster NGC2516
• Diffraction-limited 800nm imaging with the 2.56m Nordic Optical Telescope
• Five new very low mass binaries
• Diffraction-limited CCD imaging with faint reference stars
• Discovery of the Widest Very Low Mass Binary
• An all-sky optical catalogue of radio / X-ray sources
• The widest ultracool binary
• Discovery of a widely separated binary system of very low mass stars
• Close binary systems among very low mass stars and brown dwarfs
• 10 New Very Low Mass Close Binaries Resolved in the Visible

Cited by in corpus (39)

• Stellar, brown dwarf and multiple star properties from a radiation hydrodynamical simulation of star cluster formation
• Stellar, Brown Dwarf, and Multiple Star Properties from Hydrodynamical Simulations of Star Cluster Formation
• How to Constrain Your M dwarf II: the mass-luminosity-metallicity relation from 0.075 to 0.70$M_{\odot }$
• BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups With Previously Known Signs of Youth
• The AstraLux Large M-dwarf Multiplicity Survey
• Planets Around Low-Mass Stars (PALMS). IV. The Outer Architecture of M Dwarf Planetary Systems
• The Solar Neighborhood XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
• CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS
• The 10 parsec sample in the Gaia era
• BANYAN. XIII. A First Look at Nearby Young Associations with Gaia Data Release 2
• Impact of Binary Stars on Planet Statistics -- I. Planet Occurrence Rates, Trends with Stellar Mass, and Wide Companions to Hot Jupiter Hosts
• Lucky Imaging survey for southern M dwarf binaries
• BANYAN. V. A Systematic All-Sky Survey for New Very Late-Type Low-Mass Stars and Brown Dwarfs in Nearby Young Moving Groups
• CARMENES input catalogue of M dwarfs II. High-resolution imaging with FastCam
• Trends in Ultracool Dwarf Magnetism. I. X-Ray Suppression and Radio Enhancement
• Studying the Physical Diversity of Late-M Dwarfs with Dynamical Masses
• An empirical calibration to estimate cool dwarf fundamental parameters from H-band spectra
• SPIRou Input Catalogue: Global properties of 440 M dwarfs observed with ESPaDOnS at CFHT
• Getting Lucky with Adaptive Optics: Fast AO Image Selection in the Visible with a Large Telescope
• The AstraLux Multiplicity Survey: Extension to Late M-dwarfs
• Characterizing the Brown Dwarf Formation Channels from the Initial Mass Function and Binary-star Dynamics
• HAZMAT III: The UV Evolution of Mid- to Late-M Stars with GALEX
• The High-Order-Multiplicity of Unusually Wide M-dwarf Binaries: Eleven New Triple and Quadruple Systems
• Three New Eclipsing White-dwarf - M-dwarf Binaries Discovered in a Search for Transiting Planets Around M-dwarfs
• New M, L, and T Dwarf Companions to Nearby Stars from the Wide-field Infrared Survey Explorer
• Stellar Multiplicity and Debris Disks: An Unbiased Sample
• The Volume-Complete Sample of M Dwarfs with Masses 0.1 <= M/M_sol <= 0.3 within 15 Parsecs
• The Elusive Majority of Young Moving Groups. I. Young Binaries and Lithium-Rich Stars in the Solar Neighborhood
• High-Precision Radio and Infrared Astrometry of LSPM J1314+1320AB - II: Testing Pre--Main-Sequence Models at the Lithium Depletion Boundary with Dynamical Masses
• Calibration of the MEarth Photometric System: Optical Magnitudes and Photometric Metallicity Estimates for 1802 Nearby M-dwarfs
• Orbital Monitoring of the AstraLux Large M-dwarf Multiplicity Sample
• Planets Around Low-Mass Stars (PALMS). V. Age-Dating Low-Mass Companions to Members and Interlopers of Young Moving Groups
• Effective Temperatures of Low-Mass Stars from High-Resolution H-band Spectroscopy
• High-speed imaging and wavefront sensing with an infrared avalanche photodiode array
• Large Adaptive Optics Survey for Substellar Objects (LASSO) Around Young, Nearby, Low-mass Stars with Robo-AO
• The Science Case for PILOT I: Summary and Overview
• Precision Astrometry of a Sample of Speckle Binaries and Multiples with the Adaptive Optics Facilities at the Hale and Keck II Telescopes
• Detecting New Visual Binaries in Gaia DR3 with Gaia and 2MASS Photometry I. New Candidate Binaries Within 200 pc of the Sun
• The absolute magnitudes $M_J$, the binary fraction, and the binary mass ratios of M7 to M9.5 dwarfs