<i>HUBBLE SPACE TELESCOPE</i>OBSERVATIONS OF FIELD ULTRACOOL DWARFS AT HIGH GALACTIC LATITUDE
<i>HUBBLE SPACE TELESCOPE</i>OBSERVATIONS OF FIELD ULTRACOOL DWARFS AT HIGH GALACTIC LATITUDE
We present a sample of 17 newly discovered ultracool dwarf candidates later than ∼M8, drawn from 231.90 arcmin2 of Hubble Space Telescope Wide Field Camera 3 infrared imaging. By comparing the observed number counts for 17.5 ⩽ J125 ⩽ 25.5 AB mag to an exponential disk model, we estimate a …