South African Astronomical Observatory;
P.O.Box 9;
Observatory;
Cape Town;
7935;
South Africa;
Southern African Large Telescope;
P.O.Box 9;
Observatory;
Cape Town;
7935;
South Africa;
Sternberg Astronomical Institute;
Lomonosov Moscow State University;
Moscow;
119992;
Russia;
Institute of Astronomy of RAS;
Moscow 119017;
Russia;
New York University Abu Dhabi;
PO Box 129188;
Abu Dhabi;
UAE;
Center for Astro;
Particle;
and Planetary Physics;
NYU Abu Dhabi;
PO Box 129188;
Abu Dhabi;
UAE;
stars:luminosity function; mass function; stars:binaries:spectroscopic;