标题： 氢气氛白矮星与宽 binaries 伴星不太可能被发现 显示英文标题

标题： Hydrogen-Atmosphere White Dwarfs Are Less Likely To Be Found with Wide-Binary Companions

摘要： 通过交叉引用宽双星目录与通过测光确定的白矮星候选体目录以及光谱确认的白矮星目录，估计了在宽双星中发现的白矮星比例。 具有氢主导大气的白矮星的宽双星比例约为5%，但氦主导或碳主导大气的白矮星比例显著更高。 利用光谱分类，确定DA型白矮星的双星比例为$0.063\pm0.002$，而非DA型白矮星的双星比例更高，为$0.080\pm0.004$。 显示英文摘要

摘要： The fraction of white dwarfs found in wide binaries is estimated by cross referencing a catalogue of wide binaries with catalogues photometrically determined white-dwarf candidates and spectroscopically confirmed white dwarf stars. The wide-binary fraction of white dwarfs with hydrogen-dominated atmospheres is about 5%, but the fraction of white dwarfs with helium or carbon-dominated atmospheres is significantly larger. Using spectroscopic classifications, the binary fraction of DA white dwarfs is determined to be $0.063\pm0.002$ and for non-DA white dwarfs is larger at $0.080\pm0.004$.