Detached white-dwarf close-binary stars – CV's extended family
نویسندگان
چکیده
منابع مشابه
Six detached white - dwarf close binaries ⋆
We determine the orbits of four double degenerate systems (DDs), composed of two white dwarfs, and of two white dwarf – M dwarf binaries. The four DDs, WD1022+050, WD1428+373, WD1824+040, and WD2032+188, show orbital periods of 1.157155(5) d, 1.15674(2) d, 6.26602(6) d and 5.0846(3) d respectively. These periods combined with estimates for the masses of the brighter component, based on their ef...
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We initiated a comprehensive state of the art binary population synthesis study of white dwarf main-sequence star (WDMS) binaries to serve as a foundation for subsequent studies on pre-cataclysmic variables, double white dwarfs, and white dwarf + B-star binaries. We considered seven distinct formation channels subdivided into three main groups according to the evolutionary process that gives ri...
متن کاملar X iv : a st ro - p h / 99 06 10 0 v 1 7 J un 1 99 9 Detached white - dwarf close - binary stars – CV ’ s extended family
I review detached binaries consisting of white dwarfs with either other white dwarfs or low mass main-sequence stars in tight orbits around them. Orbital periods have been measured for 15 white dwarf/white dwarf systems and 22 white dwarf/M dwarf systems. While small compared to the number of periods known for CVs (> 300), I argue that each variety of detached system has a space density an orde...
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متن کاملThe nature of the close magnetic white dwarf + probable brown dwarf binary
Optical time series photometry of the short period magnetic white dwarf + probable brown dwarf binary SDSS J121209.31 + 013627.7 reveals pulse-like variability in all bands from i to u, peaking at u. These modulations are most likely due to a self-eclipsing accretion hot spot on the white dwarf, rotating into view every 88.43 minutes. This period is commensurate with the radial velocity period ...
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ژورنال
عنوان ژورنال: New Astronomy Reviews
سال: 2000
ISSN: 1387-6473
DOI: 10.1016/s1387-6473(00)00024-5