Unraveling the mystery of the brown dwarf desert with four new discoveries

Star system: TIC 934489 | Distance from the Sun: 1722 light years

Astronomers have identified four new transiting brown dwarfs, objects that are more massive than planets like Jupiter but smaller than stars. Three of these objects have unusually long orbits lasting over 100 days, significantly increasing the known population of such systems. 

The study found that while brown dwarfs on short orbits usually circle metal-rich stars, those on longer orbits tend to be found around metal-poor stars, much like low-mass binary star systems. This suggests that brown dwarfs likely form through the fragmentation of gas clouds similar to stars, and only those in massive, metal-rich discs are pushed into closer orbits near their host stars.

Scientific study

Unraveling the Brown Dwarf Desert: Four New Discoveries and a Unifying, Period-Coded Picture (external link)