2020/04/01 by Trent J. Dupuy, Michael C. Liu, E. A. Magnier +6 · 1 citation
Physics and Astronomy · Chemistry · #Stellar, planetary, and galactic studies #Astrophysics and Star Formation Studies #Astrophysical Phenomena and Observations #Parallax #Physics #Astrophysics #Binary number #Flux (metallurgy) #Astronomy #Chemistry
paper · open access · doi:10.3847/2515-5172/ab8942
published in Research Notes of the AAS 4(4), 54 (IOP Publishing)
openalex publication_date 2020/04/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We present new parallax measurements from the CFHT Infrared Parallax Program and the Pan-STARRS 3π Steradian Survey for the young (≈150-300 Myr) triple system VHS J125601.92-125723.9. This system is composed of a nearly equal-flux binary ("AB") and a wide, possibly planetary-mass companion ("b"). The system's published parallactic distance (12.7±1.0 pc) implies absolute magnitudes unusually faint compared to known young objects and is in tension with the spectrophotometric distance for the central binary (17.2±2.6 pc). Our CFHT and Pan-STARRS parallaxes are consistent, and the more precise CFHT result places VHS J1256-1257 at 22.2+1.1-1.2 pc. Our new distance results in higher values for the companion's mass (19±5 M\rm Jup) and temperature (1240±50 K), and also brings the absolute magnitudes of all three components into better agreement with known young objects.