We report the discovery of three planetary-mass companions ( M = 6 –20 M _ { Jup } ) in wide orbits ( \rho \sim 150 –300 AU ) around the young stars FW Tau ( Taurus-Auriga ) , ROXs 12 ( Ophiuchus ) , and ROXs 42B ( Ophiuchus ) .
All three wide planetary-mass companions ( “ PMCs ” ) were reported as candidate companions in previous binary survey programs , but then were neglected for > 10 years .
We therefore obtained followup observations which demonstrate that each candidate is comoving with its host star .
Based on the absolute M _ { K ^ { \prime } } magnitudes , we infer masses ( from hot-start evolutionary models ) and projected separations of 10 \pm 4 M _ { Jup } and 330 \pm 30 AU for FW Tau b , 16 \pm 4 M _ { Jup } and 210 \pm 20 AU for ROXs 12 , and 10 \pm 4 M _ { Jup } and 140 \pm 10 AU for ROXs 42B b .
We also present similar observations for ten other candidates which show that they are unassociated field stars , as well as multicolor JHK ^ { \prime } L ^ { \prime } near-infrared photometry for our new PMCs and for five previously-identified substellar or planetary-mass companions .
The NIR photometry for our sample of eight known and new companions generally parallels the properties of free-floating low-mass brown dwarfs in these star-forming regions .
However , 5 of the 7 objects with M < 30 M _ { Jup } are redder in K ^ { \prime } - L ^ { \prime } than the distribution of young free-floating counterparts of similar J - K ^ { \prime } .
We speculate that this distinction could indicate a structural difference in circum-planetary disks , perhaps tied to higher disk mass since at least two of the objects in our sample are known to be accreting more vigorously than typical free-floating counterparts .