WD 0032−317 is a low mass white dwarf star orbited by brown dwarf WD 0032−317 b.

WD 0032−317

The white dwarf WD 0032−317 is located about 1,400 light years from Earth. ^[1] WD 0032−317 formed about three billion years ago when a low mass star (possibly of 1.3 solar masses) expanded into its red giant phase. The star then blew out its outer layers leaving behind the helium-rich core (which is WD 0032−317).

WD 0032−317 b

The orbiting brown dwarf, WD 0032−317 b, was massive enough to survive the red giant's nova event. ^[2] It is an extremely hot and very large (75-88 Jupiter masses) brown dwarf that orbits WD 0032−317. One orbit from WD 0032−317 b takes only 2.5 hours. This object is tidally locked to its star with a day side temperature of 8,000 K (7,730 °C; 13,940 °F) and a night temperature of about 2,000 K (1,730 °C; 3,140 °F) making its temperature equivalent to a planet orbiting close to a late stage B-type star. The intense ultraviolet ( UV) exposure can break down the molecules in WD 0032−317's atmosphere and vaporize materials from the surface of the brown dwarf. ^{[3] [4] [5]}

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