COol Companions ON Ultrawide orbiTS (COCONUTS). I. A High-gravity T4 Benchmark around an Old White Dwarf and a Re-examination of the Surface-gravity Dependence of the L/T Transition
Authors: Zhoujian Zhang, Michael C. Liu, J.J. Hermes, Eugene A. Magnier, Mark S. Marley, Pier-Emmanuel Tremblay, Michael A. Tucker, Aaron Do, Anna V. Payne, and Benjamin J. Shappee
2020 The Astrophysical Journal891171.
Provider: AAS Journals
Caption: Figure 1.
The white dwarf primary COCONUTS-1A and the T dwarf companion COCONUTS-1B in the Pan-STARRS1 yP1-band image (size of 90″ on each side). The two objects are separated by 40.″61 ± 0.″04, which corresponds to 1280 ± 4 au at the primary’s distance.