The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs

@article{Kirkpatrick2020TheFS,
  title={The Field Substellar Mass Function Based on the Full-sky 20 pc Census of 525 L, T, and Y Dwarfs},
  author={J. Davy Kirkpatrick and Christopher Ryan Gelino and Jacqueline K. Faherty and Aaron M. Meisner and Dan Caselden and Adam C. Schneider and Federico Marocco and Alfred J. Cayago and R. L. Smart and Peter Eisenhardt and Marc J. Kuchner and Edward L. Wright and Michael C. Cushing and Katelyn Allers and Daniella Bardalez Gagliuffi and Adam J. Burgasser and Jonathan Gagn{\'e} and Sarah E. Logsdon and Emily C. Martin and James G. Ingalls and Patrick J. Lowrance and Ellianna S. Abrahams and Christian Aganze and Roman Gerasimov and Eileen C. Gonzales and Chih-chun Hsu and Nikita Kamraj and Rocio Kiman and J. M. Rees and Christopher A. Theissen and Kareem Ammar and Nikolaj Stevnbak Andersen and Paul-Andr{\'e} Beaulieu and Guillaume Colin and Charles Elachi and Samuel J. Goodman and L{\'e}opold Gramaize and Leslie K. Hamlet and Justin Hong and Alexander F. Jonkeren and Mohammed Khalil and David W. Martin and William Pendrill and Benjamin Pumphrey and Austin Rothermich and Arttu Sainio and Andr{\'e}s Guillermo Stenner and Christopher Tanner and Melina Th{\'e}venot and N. V. Voloshin and Jim Walla and Zbigniew Wedracki},
  journal={The Astrophysical Journal Supplement Series},
  year={2020},
  volume={253}
}
We present final Spitzer trigonometric parallaxes for 361 L, T, and Y dwarfs. We combine these with prior studies to build a list of 525 known L, T, and Y dwarfs within 20 pc of the Sun, 38 of which are presented here for the first time. Using published photometry and spectroscopy as well as our own follow-up, we present an array of color–magnitude and color–color diagrams to further characterize census members, and we provide polynomial fits to the bulk trends. Using these characterizations… 
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