AE AQR :|a DQ her type cataclysmic variable binary system

Abstract

AE Aquarii, a DQ Her type Cataclysmic Variable X-ray binary system, is observed with rosat, PSPC in the energy range 0.1-2.4 keV with a total of 5.74 hr period. As a result of spectral and timing analyses of the ROSAT X-ray data of AE Aquarii, it is found that both a very low mass accretion rate of 8.59 x 10-13M yr-1 estimated from the X-ray luminosity and a QPO like structure obderved in the X-ray average power spectrum support the magnetic propeller scenario in which the gas blobs of the inhomogeneous accretion stream from the secondary star to the white dwarf are radiated thermally near the white dwarf surface because of the shock heating of the gas blobs at supersonic speeds in the high accretion state of AE Aquarii. On the other hand, the accreted gas particles are radiated magnetically in ~ 10 Gauss of magnetospere far away from the white dwarf surface during the low accretion states.