The Birth and Evolution of
Brown Dwarfs
Outline
Mass
Central Temperature
Radius
Thermal Properties
Density
Spectra
Rotation
The Solar Neighborhood Census
The Mass Function
Scenarios of Brown Dwarf
Formation
The Jeans mass
The Jeans’s instability
criterion
Minimum mass of isolated star formation
Unstable Multiple Systems
Formation of two BDs via
disc fragmentation
Orbital migration
Brown Dwarfs in SFRs
Optical spectra of young BDs
Near-infrared spectra of BDs
Substellar H-R diagram
The substellar IMF
IMF of dusty clumps
Ha activity
The GG Tau quadruple system
GG Tau in the H-R diagram
A Double Brown Dwarf
Orbital motion of Gl 569 B
and C
Dynamical Substellar Masses
of Gl 569 B and C
AO Survey of M7-M9 Dwarfs
HST surveys of BD primaries
A Close VLM Companion to a Nearby Solar Analog
AO Proper Motion and
Spectroscopy of HR7672B
A Brown Dwarf Binary Close to a Young Solar Analog
AO Proper Motion and
Spectroscopy of HR5534B and C
The MF of Extrasolar Planets
Final Remarks