| |
 |
| Paper: |
Discovery of a T Dwarf Companion to the “Hyperactive” L Dwarf 2MASS J13153094-2649513 |
| Volume: |
448, 16th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun |
| Page: |
741 |
| Authors: |
Sitarski, B. N.; Gelino, C. R.; Burgasser, A. J.; Perrin, M. D. |
| Abstract: |
We report the discovery of a T dwarf companion to the “hyperactive” L dwarf 2MASS J13153094-2649513. Initially identified as a spectral binary from combined-light SpeX prism spectroscopy, we resolved the system with the Keck laser guide star adaptive optics system to be a 0.35 ± 0.07 arcsecond binary with ΔK = 4.50 ± 0.02. Resolved spectroscopy with OSIRIS confirms the T dwarf nature of the companion and indicates a spectral type of T5.5. At a projected separation of ∼7 AU, the secondary is too wide for Roche lobe overflow to be responsible for the system's persistent activity, but may nevertheless provide a clue as to the origin of this rare subclass of unusually active ultracool dwarfs. |
|
|
|
|
|
