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• W2021177386 abstract "More than 100 planets and brown dwarfs have been discovered in orbits around stars like our Sun. When these stars evolve to become red giants they will easily engulf their companions: what happens then? The discovery of the first known close sub-stellar (brown dwarf) companion to a white dwarf suggests that, surprisingly, some of these companions will survive the interaction relatively intact. Many sub-stellar companions orbit solar-type stars. These stars can engulf their companions when they become red giants. This paper reports the discovery of a brown dwarf in a short-period orbit around a white dwarf, where the engulfment of the brown dwarf had little effect on it. Many sub-stellar companions (usually planets but also some brown dwarfs) orbit solar-type stars. These stars can engulf their sub-stellar companions when they become red giants. This interaction may explain several outstanding problems in astrophysics1,2,3,4,5 but it is unclear under what conditions a low mass companion will evaporate, survive the interaction unchanged or gain mass1,4,5. Observational tests of models for this interaction have been hampered by a lack of positively identified remnants—that is, white dwarf stars with close, sub-stellar companions. The companion to the pre-white dwarf AA Doradus may be a brown dwarf, but the uncertain history of this star and the extreme luminosity difference between the components make it difficult to interpret the observations or to put strong constraints on the models6,7. The magnetic white dwarf SDSS J121209.31 + 013627.7 may have a close brown dwarf companion8 but little is known about this binary at present. Here we report the discovery of a brown dwarf in a short period orbit around a white dwarf. The properties of both stars in this binary can be directly observed and show that the brown dwarf was engulfed by a red giant but that this had little effect on it." @default.
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• W2021177386 date "2006-08-01" @default.
• W2021177386 modified "2023-10-01" @default.
• W2021177386 title "Survival of a brown dwarf after engulfment by a red giant star" @default.
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• W2021177386 doi "https://doi.org/10.1038/nature04987" @default.
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