Detached white dwarf binaries
Long-term eclipse timing of white dwarf binaries: an observational hint of a magnetic mechanism at work
... semi-detached white dwarf binaries, also known as cataclysmic ...magnetic white dwarfs, and are therefore classified as po- ...brown dwarf donor ...
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Discovery of ZZ Cetis in detached white dwarf plus main-sequence binaries
... pulsating white dwarfs (WDs) in detached white dwarf plus main-sequence ...WD+MS binaries, based on the surface gravities and effective temperatures of the ...pulsating white ...
9
Physical properties of eclipsing white dwarf binaries
... Howell et al. 2001 for reviews and see also Knigge et al. 2011]. Disrupted magnetic braking In the DMB prescription, CV evolution is divided in two main phases, depending on the prevailing AML mechanism. For CVs above ...
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Detailed studies of white dwarf binaries and their orbital periods
... 600 white dwarf eclipse observations were obtained, covering a wide variety of close ...the white dwarf eclipses the aim of this programme is to discover the underlying cause of variations in ...
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The shortest period detached white dwarf + main-sequence binary
... core white dwarfs, enabling us to measure masses and radii for these white dwarfs which are not found in wide binaries (that did not undergo a common envelope ...
10
The evolutionary state of short period magnetic white dwarf binaries
... new binaries fit into this picture? The pa- rameters of the three magnetic binaries, SDSSJ1212+0136, SDSSJ1250+1549 and SDSSJ1514+0744, are plotted in Fig- ure 8 in filled black ...K white dwarfs, ...
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Detection of Double White Dwarf Binaries with Gaia, LSST and eLISA
... Finally, detached DWDs with orbital periods in the range from one hour to a few minutes are particularly suited for study the physics of tides, the stability of the mass-transfer process in compact bi- naries, and ...
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A stellar prominence in the white dwarf/red dwarf binary QS Vir: evidence for a detached system
... becomes detached once more, until angular momentum once more brings the two stars close enough to re-initiate mass ...resemble detached pre-cataclysmic ...
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SDSS J150722.30+523039.8: a cataclysmic variable formed directly from a detached white dwarf/brown dwarf binary?
... brown dwarf secondaries, the com- mon envelope efficiency parameter, α ce , would have to drop to zero for secondary masses lower than ...brown dwarf remains smaller than its Roche ...close binaries ...
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Evolution of Angular Momentum and Orbital Period Changes in Close Double White Dwarf Binaries
... DWD binaries over the entire parameter space of interest for integrations that calculated using the Eggleton approximation for the Roche ...become detached as the orbital period continues to grow and the ...
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Two white dwarfs in ultrashort binaries with detached, eclipsing, likely sub-stellar companions detected by K2
... the white dwarf, based on the fact that it does not fill its Roche ...any detached system with a period 50 min must be older than ∼5 Gyr and must have a mass ...the white dwarf of ...
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Long-term eclipse timing of white dwarf binaries: an observational hint of a magnetic mechanism at work
... of white dwarfs in close binaries to measure apparent and/or real variations in their orbital ...close binaries, both detached and semi-detached and with M-dwarfs, K-dwarfs, brown ...
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14 new eclipsing white dwarf plus main-sequence binaries from the SDSS and Catalina surveys
... variable binaries with similar pe- riods, near 4 hours, and spectral types M2–3, which are very close to Roche-lobe ...WDMS binaries with early M-type main- sequence stars due to their enhanced angular ...
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Eclipsing white dwarf binaries
... Abstract Recent years have seen an explosion in the number of eclipsing binaries containing white dwarfs. In the last few years the number of systems has increased from 7 to over 40, thanks mainly to large ...
205
A magnetic white dwarf in a detached eclipsing binary
... close, detached, eclipsing white dwarf plus M dwarf binary which shows a large infrared excess which has been interpreted in terms of a circumbi- nary dust ...the white dwarf ...
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A magnetic white dwarf in a detached eclipsing binary
... close, detached, eclipsing white dwarf plus M dwarf binary which shows a large infrared excess which has been interpreted in terms of a circumbinary dust ...the white dwarf ...
12
Follow-up Observations of SPY White Dwarf + M-Dwarf Binaries
... Spectra of the Hα region were obtained with the SPIRAL spectrograph on the AAT telescope. Of the eleven stars observed, seven are binaries with periods in the range 2.8 hours to 7.7 days. We also show that one of ...
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A precision study of two eclipsing white dwarf plus M dwarf binaries
... however, since they are all constrained by the same spec- troscopic information the uncertainties in each light curve fit are not independent. Therefore we combine the results from each light curve in an optimal way by ...
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Resonant excitation of white dwarf oscillations in compact object binaries
... the white dwarf along an inspiral trajectory by assuming that the mode damps to some non-zero fiducial amplitude between resonances, which we take to be ...
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Testing the white dwarf mass-radius relationship with eclipsing binaries
... K white dwarf and an ...the white dwarf (see Figure 8 ), allowing us to reliably trace its centre-of-mass as well as measure its rotational ...
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