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- W2080474423 abstract "Infrared spectroscopic observations of LL Andromedae and EF Eridani are presented. Our K-band spectrum of LL And reveals the presence of methane absorption in the secondary star indicating an effective temperature ≲1300 K, similar to a T-type methane brown dwarf. The secondary star in EF Eri is seen to be warmer with an effective temperature of ~1650 K and a spectroscopic classification consistent with an L4-5 star. Both secondaries have theoretical mass estimates of 0.04-0.055 M☉ (40-55 MJup). Our IR spectroscopic observations of LL And and EF Eri provide the first direct proof of the theoretical prediction that post-period minimum cataclysmic variables contain brown dwarf-like secondary stars." @default.
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- W2080474423 date "2001-03-20" @default.
- W2080474423 modified "2023-09-23" @default.
- W2080474423 title "Spectroscopic Discovery of Brown Dwarf–like Secondary Stars in the Cataclysmic Variables LL Andromedae and EF Eridani" @default.
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- W2080474423 doi "https://doi.org/10.1086/319499" @default.
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