"The notion of ultra-cold dwarf stars was introduced in 1997 by David Kirkpatrick, Todd J. Henry, and Michael J. Irwin."
This is false. It was introduced by Alexander Oparin in his work, "The Origin of Life". In it, it is introduced that all planets started out as red hot stars like the Sun, which then cooled and shrunk to Earth-like "planet" temperatures and sizes. This was back in the 1920's.
Don't take my word for it. Read it yourself. Cool stars are clearly intermediate stages to a star's evolution into "planets". This is the theory I'm working on. Will they pay attention? Probably not. Their heads are firmly placed up their you know whats. They are looking at close to black dwarf stage stars orbiting a much younger one. It is not difficult to understand!
http://www.valencia.edu/orilife/textos/The%20Origin%20of%20Life.pdf
This TRAPPIST stuff is not a prediction of any accretion model, it is affirmation that they have no idea what they are talking about as well they ignore history. It has already been figured out, almost 100 years ago!!