Kaltenegger, L. & Haghighipour N., Calculating the Habitable
Zone of Binary Star Systems I: S - type Binaries, ApJ, 777, 2, 165, 11 pp., 2013
The orbit
of an Earth - like planet around the tight
binary system that
star Ba forms with its brown dwarf companion in the liquid water
zone would have to be centered around 1.1 AU — a little farther than Earth's orbital distance around Sol — with an orbital period exceeding one Earth year.