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- W2964336101 abstract "We have extended our detailed survey of the local white dwarf population from 20 pc to 25 pc, effectively doubling the sample volume, which now includes 232 stars. In the process new stars within 20 pc have been added, a more uniform set of distance estimates as well as improved spectral and binary classifications are available. The present 25 pc sample is estimated to be about 68% complete (the corresponding 20 pc sample is now 86% complete). The space density of white dwarfs is unchanged at 4.8 pm 0.5 x 10^{-3} pc^{-3}. This new study includes a white dwarf mass distribution and luminosity function based on the 232 stars in the 25 pc sample. We find a significant excess of single stars over systems containing one or more companions (74% vs 26%). This suggests mechanisms that result in the loss of companions during binary system evolution. In addition this updated sample exhibits a pronounced deficiency of nearby Sirius-Like systems. Eleven such systems were found within the 20 pc volume vs, only one additional system found in the volume between 20 pc and 25 pc. An estimate of white dwarf birth rates during the last 8 Gyr is derived from individual remnant cooling ages. A discussion of likely ways new members of the local sample may be found is provided." @default.
- W2964336101 created "2019-07-30" @default.
- W2964336101 creator A5068709354 @default.
- W2964336101 creator A5072195436 @default.
- W2964336101 creator A5072482653 @default.
- W2964336101 creator A5072661889 @default.
- W2964336101 date "2016-06-30" @default.
- W2964336101 modified "2023-10-17" @default.
- W2964336101 title "The 25 parsec local white dwarf population" @default.
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- W2964336101 doi "https://doi.org/10.1093/mnras/stw1357" @default.
- W2964336101 hasPublicationYear "2016" @default.
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