SIMBAD references

1999ApJ...517..919S - Astrophys. J., 517, 919-924 (1999/June-1)

Discovery of a magnetic white dwarf in the symbiotic binary Z Andromedae.


Abstract (from CDS):

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. The oscillation was detected on all eight occasions on which the source was observed over a time span of nearly 1 yr, making it the first such persistent periodic pulse found in a symbiotic binary. The amplitude was typically 2-5 mmag, and it was correlated with the optical brightness during a relatively small outburst of the system. The most natural explanation is that the oscillation arises from the rotation of an accreting magnetic (BS≳105G) white dwarf. This discovery constrains the outburst mechanisms, since the oscillation emission region near the surface of the white dwarf was visible during the outburst.

Abstract Copyright:

Journal keyword(s): Accretion, Accretion Disks - Stars: Binaries: Symbiotic - stars: individual (Z Andromedae) - Stars: Magnetic Fields - Stars: Oscillations - Stars: Rotation

Simbad objects: 3

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