WISE J135501.90-825838.9 is a Nearby, Young, Extremely Low-mass Substellar Binary

Abstract

We present a parallax solution for WISE J135501.90-825838.9, a spectral binary with spectral types L7+T7.5 and candidate AB Doradus member. Using $WISE$ astrometry, we obtain a distance of $d=16.7\pm 5.3$ pc. This preliminary parallax solution provides further evidence that WISE J135501.90-825838.9 is a member of AB Doradus (130-200 Myr), and when combined with evolutionary models predicts masses of 11 $M_{\mathrm{Jup}}$ and 9 $M_{\mathrm{Jup}}$ for both components.

Submitted to RNAAS