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]
References
- ^ Atkinson, Nancy (2023-08-17). "This Brown Dwarf is 2,000 Degrees Hotter Than the Sun". Universe Today. Retrieved 2023-08-28.
- ^ Yirka, Bob; Phys.org. "Discovery of a Brown Dwarf Hotter Than the Sun". phys.org. Retrieved 2023-08-28.
- ^ Hallakoun, Na’ama; Maoz, Dan; Istrate, Alina G.; Badenes, Carles; Breedt, Elmé; Gänsicke, Boris T.; Jha, Saurabh W.; Leibundgut, Bruno; Mannucci, Filippo; Marsh, Thomas R.; Nelemans, Gijs; Patat, Ferdinando; Rebassa-Mansergas, Alberto (2023-08-14). "An Irradiated-Jupiter Analogue Hotter Than the Sun". Nature Astronomy: 1–12. arXiv:2306.08672. doi:10.1038/s41550-023-02048-z. ISSN 2397-3366.
- ^ Gamillo, Elizabeth (15 August 2023). "Astronomers Find a Brown Dwarf That's Hotter Than the Sun | Astronomy.com". Astronomy Magazine. Retrieved 28 August 2023.
- ^ "A Brown Dwarf Star Serves as an Ultrahot-Jupiter Analogue". pubs.aip.org. Retrieved 28 August 2023.
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