i'z' photometry of L5 and later dwarf candidates

Thanks to recent and ongoing large scale surveys, hundreds of brown dwarfs have been discovered in the last decade. The Canada-France Brown Dwarf Survey is a wide-field survey...得益于近期及持续开展的大规模巡天观测，近十年间已发现数百颗褐矮星（brown dwarfs）。加拿大-法国褐矮星巡天（Canada-France Brown Dwarf Survey）是一项宽视场巡天项目……