The unusual X-ray pulse timing of AE Aquarii

Details The unusual X-ray pulse timing of AE Aquarii The unusual X-ray pulse timing of AE Aquarii

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...378..286d&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 378, Sept. 1, 1991, p. 286-292.

Astronomy and Astrophysics

Astrophysics

27

Emission Spectra, Stellar Orbits, White Dwarf Stars, X Ray Binaries, Doppler Effect, Extreme Ultraviolet Radiation, Optical Thickness

Scientific paper

X-ray data for AE Aqr are reanalyzed by using a refined analysis technique and different approaches. The results obtained indicate that X-rays are produced at the same site as the optical, and there is no evidence for the direct X-ray beam from the white dwarf. The optical period was found to be the most significant X-ray period. The direct X-ray beam from the white dwarf is at least four times weaker than the pulsed X-ray signal at the optical period. Given the above-mentioned correlations with the optical, it is inferred that the X-ray pulsations must originate at the same target in the orbit responsible for the optical pulsations. There is a possible orbital modulation of the optical pulse-timing and emission-line orbits. It is shown that the X-ray pulse has slipped at least twice in phase by more than 30 percent in two years' time.

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