학술논문
Thirteen New M Dwarf + T Dwarf Pairs Identified with WISE/NEOWISE
Document Type
Working Paper
Author
Marocco, Federico; Kirkpatrick, J. Davy; Schneider, Adam C.; Meisner, Aaron M.; Popinchalk, Mark; Gelino, Christopher R.; Faherty, Jacqueline K.; Burgasser, Adam J.; Caselden, Dan; Gagné, Jonathan; Aganze, Christian; Bardalez-Gagliuffi, Daniella C.; Casewell, Sarah L.; Hsu, Chih-Chun; Kiman, Rocio; Eisenhardt, Peter R. M.; Kuchner, Marc J.; Stern, Daniel; Gramaize, Léopold; Sainio, Arttu; Bickle, Thomas P.; Rothermich, Austin; Pendrill, William; Thévenot, Melina; Kabatnik, Martin; Colombo, Giovanni; Higashimura, Hiro; Kiwy, Frank; Marchese, Elijah J.; Andersen, Nikolaj Stevnbak; Tanner, Christopher; Walla, Jim; Wedracki, Zbigniew; Collaboration, The Backyard Worlds
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Subject
Language
Abstract
We present the discovery of 13 new widely separated T dwarf companions to M dwarf primaries, identified using WISE/NEOWISE data by the CatWISE and Backyard Worlds: Planet 9 projects. This sample represents a $\sim$60% increase in the number of known M+T systems, and allows us to probe the most extreme products of binary/planetary system formation, a discovery space made available by the CatWISE2020 catalog and the Backyard Worlds: Planet 9 effort. Highlights among the sample are WISEP J075108.79-763449.6, a previously known T9 thought to be old due to its SED, which we now find is part of a common-proper-motion pair with L 34-26 A, a well studied young M3 V star within 10 pc of the Sun; CWISE J054129.32-745021.5 B and 2MASS J05581644-4501559 B, two T8 dwarfs possibly associated with the very fast-rotating M4 V stars CWISE J054129.32-745021.5 A and 2MASS J05581644-4501559 A; and UCAC3 52-1038 B, which is among the widest late T companions to main sequence stars, with a projected separation of $\sim$7100 au. The new benchmarks presented here are prime $JWST$ targets, and can help us place strong constraints on formation and evolution theory of substellar objects as well as on atmospheric models for these cold exoplanet analogs.
Comment: Accepted for publication in ApJ. 35 pages, 6 tables, 21 figures
Comment: Accepted for publication in ApJ. 35 pages, 6 tables, 21 figures