New Cold Subdwarf Discoveries from Backyard Worlds and a Metallicity Classification System for T Subdwarfs

Burgasser, Adam J. and Schneider, Adam C. and Meisner, Aaron M. and Caselden, Dan and Hsu, Chih-Chun and Gerasimov, Roman and Aganze, Christian and Softich, Emma and Karpoor, Preethi and Theissen, Christopher A. and Brooks, Hunter and Bickle, Thomas P. and Gagné, Jonathan and Artigau, Ètienne and Marsset, Michaël and Rothermich, Austin and Faherty, Jacqueline K. and Kirkpatrick, J. Davy and Kuchner, Marc J. and Andersen, Nikolaj Stevnbak and Beaulieu, Paul and Colin, Guillaume and Gantier, Jean Marc and Gramaize, Leopold and Hamlet, Les and Hinckley, Ken and Kabatnik, Martin and Kiwy, Frank and Martin, David W. and Massat, Diego H. and Pendrill, William and Sainio, Arttu and Schümann, Jörg and Thévenot, Melina and Walla, Jim and Wdracki, Zbigniew and Backyard Worlds: Planet 9 Collaboration

ApJ