{"paper":{"title":"The Mass-Luminosity Relation in the L/T Transition: Individual Dynamical Masses for the New J-Band Flux Reversal Binary SDSSJ105213.51+442255.7AB","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP"],"primary_cat":"astro-ph.SR","authors_text":"David A. Golimowski, Kuenley Chiu, Michael C. Liu, Michael J. Ireland, S. K. Leggett, Trent J. Dupuy","submitted_at":"2015-03-20T20:00:10Z","abstract_excerpt":"We have discovered that SDSSJ105213.51+442255.7 (T0.5$\\pm$1.0) is a binary in Keck laser guide star adaptive optics imaging, displaying a large J-to-K-band flux reversal ($\\Delta$J = -0.45$\\pm$0.09 mag, $\\Delta$K = 0.52$\\pm$0.05 mag). We determine a total dynamical mass from Keck orbital monitoring (88$\\pm$5 $M_{\\rm Jup}$) and a mass ratio by measuring the photocenter orbit from CFHT/WIRCam absolute astrometry ($M_B/M_A$ = 0.78$\\pm$0.07). Combining these provides the first individual dynamical masses for any field L or T dwarfs, 49$\\pm$3 $M_{\\rm Jup}$ for the L6.5$\\pm$1.5 primary and 39$\\pm$3 "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.06212","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}