Results 1 to 10 of about 365 (77)
Formation of high-field magnetic white dwarfs from common envelopes. [PDF]
Proc Natl Acad Sci U S A, 2011 The origin of highly-magnetized white dwarfs has remained a mystery since their initial discovery. Recent observations indicate that the formation of high-field magnetic white dwarfs is intimately related to strong binary interactions during post-main ...
Nordhaus J +4 more
europepmc +3 more sources
WZ Sagittae as a DQ Herculis star [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 8 pages, 5 figures; accepted for publication in ...
Lasota, Jean-Pierre +2 more
openaire +4 more sources
The Astronomical Journal, 2023 There have been relatively few published long-duration, uninterrupted light curves of magnetic cataclysmic variable stars in which the accreting white dwarf’s rotational frequency is slightly desynchronized from the binary orbital frequency.
Colin Littlefield +9 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 When the accreting white dwarf in a magnetic cataclysmic variable star (mCV) has a field strength in excess of 10 MG, it is expected to synchronize its rotational frequency to the binary orbit frequency, particularly at small binary separations, due to ...
Colin Littlefield +8 more
doaj +1 more source
The Astrophysical Journal, 2023 We report timing and broadband spectral analysis of a Galactic X-ray source, CXOGBS J174517.0−321356 (J1745), with a 614 s periodicity. Chandra discovered the source in the direction of the Galactic Bulge.
Benjamin Vermette +11 more
doaj +1 more source
Rapid Evolution of the White Dwarf Pulsar AR Scorpii
The Astrophysical Journal Letters, 2023 Analysis of AR Sco optical light curves spanning 9 yr shows a secular change in the relative amplitudes of the beat pulse pairs generated by the two magnetic poles of its rotating white dwarf.
Peter Garnavich +6 more
doaj +1 more source
Gravitational Redshift Detection from the Magnetic White Dwarf Harbored in RX J1712.6–2414
The Astrophysical Journal, 2023 Gravitational redshift is a fundamental parameter that allows us to determine the mass-to-radius ratio of compact stellar objects, such as black holes, neutron stars, and white dwarfs (WDs).
Takayuki Hayashi +4 more
doaj +1 more source
57 second oscillations in Nova Centauri 1986 (V842 Cen) [PDF]
, 2009 High speed photometry in 2008 shows that the light curve of V842 Cen possesses a coherent modulation at 56.825 s, with sidebands at 56.598 s and 57.054 s. These have appeared since this nova remnant was observed in 2000 and 2002.
Andrea +37 more
core +1 more source
The Astrophysical Journal, 1986 Time-resolved X-ray and optical photometric and optical spectroscopic observations of the ultrashort period cataclysmic variable SW UMa are reported. The spectroscopic observations reveal the presence of an s-wave component which is almost in phase with the extreme line wings and presumably the white dwarf. This very unusual phasing in conjunction with
A. W. Shafter +2 more
openaire +1 more source
Discovery of a Magnetic White Dwarf in the Symbiotic Binary Z Andromedae [PDF]
, 1998 We report the first result from our survey of rapid variability in symbiotic binaries: the discovery of a persistent oscillation at P=1682.6 +- 0.6 s in the optical emission from the prototype symbiotic, Z Andromedae.
Duschl W. J. +12 more
core +2 more sources