... Science . ... Research . Binary stars with a special emphasis on mass transfer . ... Binary brown dwarfs . ... If you are interested in pursueing an undergraduate research project or your PhD thesis related to one of the topics above at ESO Vitacura, please contact me . ... It indeed appears that at least 2 stars out of 3 are members of a binary system, i.e. they are gravitationally bound to a companion. ... Further research has shown that these peculiar stars are all member of a binary system. ...