Luminosity function of M7-L8 ultracool dwarfs

We present a 20pc, volume-limited sample of M7-L8 dwarfs created through spectroscopic follow-up of sources selected from the Two Micron All Sky Survey Second Incremental...我们构建了一个20秒差距体积限选的M7至L8型矮星样本，该样本通过对从2微米全天巡天（Two Micron All Sky Survey）第二次增量……中筛选出的源天体开展光谱后续观测得到。