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Ross 19B: An Extremely Cold Companion Discovered via the Backyard Worlds: Planet 9 Citizen Science Project

  • Authors: Adam C. Schneider, Aaron M. Meisner, Jonathan Gagné, Jacqueline K. Faherty, Federico Marocco, Adam J. Burgasser, J. Davy Kirkpatrick, Marc J. Kuchner, Léopold Gramaize, Austin Rothermich, Hunter Brooks, Frederick J. Vrba, Daniella Bardalez Gagliuffi, Dan Caselden, Michael C. Cushing, Christopher R. Gelino, Michael R. Line, Sarah L. Casewell, John H. Debes, Christian Aganze, Andrew Ayala, Roman Gerasimov, Eileen C. Gonzales, Chih-Chun Hsu, Rocio Kiman, Mark Popinchalk, Christopher Theissen

Adam C. Schneider et al 2021 The Astrophysical Journal 921 .

  • Provider: AAS Journals

Caption: Figure 4.

Absolute J magnitude, absolute W2 magnitude, and J–W2 color vs. spectral type for the 20 pc sample of nearby L, T, and Y dwarfs from Kirkpatrick et al. (2021). Known wide companions are highlighted in light blue. The 3σ absolute magnitudes (based on the Gaia EDR3 distance to Ross 19A) and color of Ross 19B are indicated by the gray shaded region in each panel. The position of the cold companion WD 0806-661B in these diagrams (labeled) is discussed in the text.

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