Посилання:Physical properties of substellar population in the young σ Orionis cluster / V.J.S. Bejar // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 239-243. — Бібліогр.: 18 назв. — англ.
Підтримка:We review different searches for isolated brown dwarfs and planetary mass objects (M <13MJup) which we have conducted in the optical and infrared ranges, in the very young (age of 1–8 Myr), nearby (d ~ 350 pc) σ Orionis cluster. We describe the main characteristics of this substellar population: spectral properties, effective temperature, spatial distribution, and the presence of discs. We present an initial mass spectrum in the substellar domain.