The Intermediate Age Brown Dwarf LP 944-20

Abstract

Observations are presented which show that LiI 6708A is detected with equivalent width of 0.53+-0.05A in the proper-motion object LP 944-20 (which is also known as BRI 0337-3535). This Li detection implies that LP 944-20 is a brown dwarf with mass between 0.057 and 0.063Mo and age between 475 and 650Myr, making it the first brown dwarf to have its mass and age precisely determined.

3 pages, 2 figures

Cited by in corpus (61)

• New Neighbors from 2MASS: Activity and Kinematics at the Bottom of the Main Sequence
• BANYAN. II. Very Low Mass and Substellar Candidate Members to Nearby, Young Kinematic Groups With Previously Known Signs of Youth
• Infrared Spectra and Spectral Energy Distributions of Late-M- and L-Dwarfs
• An Effective Temperature Scale for Late M and L Dwarfs, from Resonance Absorption Lines of CsI and RbI
• An empirical criterion to classify T Tauri stars and substellar analogs using low-resolution optical spectroscopy
• Radio Observations of a Large Sample of Late-M, L, and T Dwarfs: The Distribution of Magentic Field Strengths
• L Dwarfs and the Substellar Mass Function
• Spitzer/IRAC Photometry of M, L, and T Dwarfs
• The Field Substellar Mass Function Based on the Full-sky 20-pc Census of 525 L, T, and Y Dwarfs
• High resolution spectroscopy of ultracool M dwarfs
• L-dwarf variability: I-band observations
• Chandra Detection of an X-ray Flare from the Brown Dwarf LP 944-20
• Infrared Colors at the Stellar/Substellar Boundary
• The discovery of a very cool, very nearby brown dwarf in the Galactic plane
• Epsilon Indi B: a new benchmark T dwarf
• Spectroscopic rotational velocities of brown dwarfs
• Meeting the Cool Neighbours I: Nearby stars in the NLTT Catalogue - Defining the sample
• Searching for Weather in Brown Dwarfs
• The lithium depletion boundary and the age of the Hyades cluster
• A Volume-limited Sample of 63 M7--M9.5 Dwarfs I. Space Motion, Kinematic Age, and Lithium
• Planets Around Low-Mass Stars (PALMS). I. A Substellar Companion to the Young M Dwarf 1RXS J235133.3+312720
• Spectroscopic classification of red high proper motion objects in the Southern Sky
• Periodic photometric variability of the brown dwarf Kelu-1
• A multiwavelength radial velocity search for planets around the brown dwarf LP 944-20
• The Brown Dwarf Kinematics Project (BDKP). IV. Radial Velocities of 85 Late-M and L dwarfs with MagE
• The First L-type Brown Dwarf in the Pleiades
• The Discovery of a Companion to the Very Cool Dwarf Gl~569~B with the Keck Adaptive Optics Facility
• Near-infrared low-resolution spectroscopy of Pleiades L-type brown dwarfs
• X-ray emission of brown dwarfs: Towards constraining the dependence on age, luminosity, and temperature
• Companions of old brown dwarfs, and very low mass stars
• Neighbours hiding in the Galactic plane - a new M/L dwarf candidate for the 8pc sample
• The field brown dwarf LP 944-20 and the Castor moving group
• Discovery of the first wide L dwarf + giant binary system and eight other ultra-cool dwarfs in wide binaries
• Coronal X-ray emission from an intermediate-age brown dwarf
• SSSPM J1444-2019: an extremely high proper motion, ultracool subdwarf
• Probing Dust around Brown Dwarfs: The naked LP 944-20 and the Disk of Cha Ha2
• LSR0602+3910 - Discovery of a Bright Nearby L-type Brown Dwarf
• Search for nearby stars among proper motion stars selected by optical-to-infrared photometry. II. Two late M dwarfs within 10 pc
• A new strongly X-ray flaring M9 dwarf in the solar neighborhood
• XMM-Newton observations of the nearby brown dwarf LP 944-20
• Lithium in LP 944-20
• A Chandra Observation of a TW Hydrae Association Brown Dwarf
• WISEP J180026.60+013453.1: A Nearby Late L Dwarf Near the Galactic Plane
• Extremely faint high proper motion objects from SDSS stripe 82 - Optical classification spectroscopy of about 40 new objects
• Three newly-discovered M-dwarf companions of Solar Neighbourhood stars
• VLT X-shooter spectroscopy of the nearest brown dwarf binary
• A search for southern ultracool dwarfs in young moving groups
• The Second APM UKST Colour Survey for z>4 Quasars
• Kepler Observations of Very Low-Mass Stars
• Spectroscopic signatures of youth in low-mass kinematic candidates of young moving groups
• An Age Constraint for the Very Low-Mass Stellar/Brown Dwarf Binary 2MASS J03202839-0446358AB
• Detection of lithium in nearby young late-M dwarfs
• A search for lithium in metal-poor L dwarfs
• A non-uniform distribution of the nearest brown dwarfs
• On the Formation of Brown Dwarfs
• X-ray emission from a brown dwarf in the Pleiades
• SPIRAL Phase A: A Prototype Integral Field Spectrograph for the AAT
• Formation, evolution and multiplicity of brown dwarfs and giant exoplanets
• Short-term spectroscopic monitoring of two cool dwarfs with strong magnetic fields
• New constraints on the minimum mass for thermonuclear lithium burning in brown dwarfs
• Spatially Dependent Photometric Activity of M dwarfs in the Solar Cylinder