VLT/NaCo angular differential imaging at L ’ ( 3.8 ~ { } \mu m ) revealed a probable giant planet comoving with the young and early-type HD 95086 also known to harbor an extended debris disk .
The discovery was based on the proper motion analysis of two datasets spanning 15 months .
However , the second dataset suffered from bad atmospheric conditions , which limited the significance of the re-detection at the 3 \sigma level .
In this Letter , we report new VLT/NaCo observations of HD 95086 obtained on 2013 June 26-27 at L ’ to recover the planet candidate .
We unambiguously redetect the companion HD 95086 b with multiple independent pipelines at a signal-to-noise ratio greater than or equal to 5 .
Combined with previously reported measurements , our astrometry decisively shows that the planet is comoving with HD 95086 and inconsistent with a background object .
With a revised mass of 5 \pm 2 Jupiter masses , estimated from its L ’ photometry and “ hot-start ” models at 17 \pm 4 ~ { } Myr , HD 95086 b becomes a new benchmark for further physical and orbital characterization of young giant planets .