Abstract
ABSTRACT. V4O46 Sgr is an extremely active BY Dra type red dwarf star. Spectroscopic observations show that this object presents typical characteristics of a star in the pre-main sequence stage of evolution. It was discovered to be a s pe c t ro s cop i C binary with very s imi 1 ar components. It does not seem to be associated with any cloud or asso - ciation, although it shows far infrared excess as detected by IRAS. The H emission, although varying in intensity with the orbital or rotational period (2.4213d), seems to come from a common envelope of the system. We will present an analysis of all the data obtained and will discuss some implications concerning the evolutionary model of the system. K wo : STARS-BINARY -- STARS-PRE-MAIN SEQUENCE - STAPS-T TAURI
