On the Rapid Spin-down and Low Luminosity Pulsed Emission from AE Aquarii

Details On the Rapid Spin-down and Low Luminosity Pulsed Emission from AE Aquarii On the Rapid Spin-down and Low Luminosity Pulsed Emission from AE Aquarii

1999-09-10

arxiv.org/abs/astro-ph/9909173v1

Astronomy and Astrophysics

Astrophysics

25 pages and one PS figure, Submitted to ApJ

Scientific paper

10.1086/309149

AE Aqr is an unusual close binary system with a very short white dwarf spin period, a high spin-down rate, a relatively low quiescent luminosity, and clear pulse signals. The exact nature of the large spin-down power has not been well explained mainly due to the fact that the observed luminosities in various energy ranges are much lower than the spin-down power. We consider an unconventional picture of AE Aqr in which an accreting white dwarf, modeled as a magnetic dipole whose axis is misaligned with the spin axis, is rapidly spun-down via gravitational radiation emission and therefore the spin-down power is not directly connected to any observable electromagnetic emission.

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