X X (Knee) Knee Victor Franz Hess

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1 X AE X 33 X X Victor Franz Hess ) (Knee) (Ankle) 1) Knee Knee X 526

2 2 Hillas 3) 1 1) 100 X 2) 2. 2 Hillas 3) B L, v evbl Hillas B L / 4) Hillas

3 X Pavelin Bond 5), 6) AM AE DQ 7) 9) CANGAROO H.E.S.S., MAGIC, VERI- TAS X X 3. AE X ) X Astro-E2 JAXA X NASA Goddard Space Flight Cen- 528

4 ter Astro-E Astro-E Astro-E 10 Astro-E Astro-E X X X CCD (X-ray Imaging Spectrometer; XIS) X X (Hard X-ray Detector; HXD) X 4 X (Magnetic Cataclysmic Valiables; MCV) MCV X X X X MCV AE ) MCV 20 MCV AE ) XMM-Newton X X 13)

5 X AE 4. X X HXD X HXD AE X HXD X HXD HXD X CCD X HXD X HXD X 0.02 X X HXD X X X HXD X X HXD X X X AE

6 5 AE X CCD X 2 X CCD 2 X 4 0 (folding) c XIS XIS X CCD X XIS 8 33 AE

7 XIS HXD HXD 60 14) JAXA 5 c 2 5 HXD XIS/HXD HXD 6 AE 33.6 AE 33.1 AE X 532

8 7 X 15) AE X X 5. X 5 X HXD XIS HXD X X HXD X X 15) AE X NASA AE (credit Casey Reed NASA)

9 X 0.1 AE X X NASA NASA Goddard Space Flight Center WWW page 16) AE 8 NHK 2 TV 24 17) ISAS/JAXA NASA/GSFC ISAS/JAXA Sachindra Naik 1) Cronin J. W., 1999, Rev. Mod. Phys. 71, S165 2) Terada Y., et al., 2008, PASJ 60, 387 3) Hillas A. M., 1984, ARA&A 22, 425 4) 2008, in press 5) Pavelin P. E., Spencer R. E., Davis R. J., 1994, MNRAS 269, 779 6) Bond H. E., et al., 2002, PASP 114, ) Meintjes P. J., et al., 1994, ApJ 434, 292 8) Meintjes P. J., et al., 1992, ApJ 401, 325 9) Bhat C., et al., 1991, ApJ 369, ) Mitsuda K., et al., 2007, PASJ 59, S1 11) Patterson J., 1979, ApJ 234, ) de Jager O. C., 1994, ApJS 90, ) Itoh K., et al., 2006, ApJ 639, ) Terada Y., et al., 2008, PASJ 60, S25 15) Possenti A., et al., 2002, A&A 387, ) http: / / www. nasa. gov / centers / goddard / news / topstory/2007/whitedwarf pulsar.html 17) terada/01work/ press release2008/index j.html White Dwarf Equivalent of Pulsars, Discovered with Suzaku Yukikatsu TERADA Saitama University Abstract: Strongly magnetized white dwarfs have the potential to be a new particle acceleration site of a cosmic-ray origin. Since white dwarfs are common objects, they should become quiet but numerous accelerators giving important contributions to low-energy cosmicrays. Suzaku observed one of the most promising objects as accelerators, AE Aquarii, which has magnetic field of 10 5 gauss and a rapid spin period of 33 seconds. We discovered spiky pulsations like neutron star pulsars in the hard X-ray band of over 4 kev band, in addition to the well-known thermal modulation in the softer band. From the timing features, spectral shapes and fluxes, we conclude that AE Aquarii is a white dwarf equivalent of neutron star pulsars. 534