Together with Antonio Nemmer Kanaan Neto and other researchers, he is the co-discoverer of BPM37093, the "Diamond Star", a crystallized carbon-oxygen core pulsating white dwarf, and an Oxygen white dwarf, "Dox".
Together with Antonio Nemmer Kanaan Neto and other researchers, he is the co-discoverer of BPM37093, the "Diamond Star", a crystallized carbon-oxygen core pulsating white dwarf. With Detlev Koester and Gustavo Ourique, he discovered SDSSJ1240 +6710, an Oxygen white dwarf, "Dox".