Infrared Observations and Modeling of One of the Coolest T Dwarfs: Gliese 570D
Infrared Observations and Modeling of One of the Coolest T Dwarfs: Gliese 570D
We have obtained a good quality R$\sim$400 0.8-2.5 $\mu$m spectrum and accurate photometry of Gl 570D, one of the coolest and least luminous brown dwarfs currently known. The spectrum shows that Gl 570D has deeper absorptions in the strong water and methane bands at 1.12-1.17 $\mu$m, 1.33-1.45 $\mu$m, 1.62-1.88 $\mu$m, …