338 8570 255 e-mail: terada@phy.saitama-u.ac.jp 10 5 X AE X 33 X X 100 1. 100 1912 Victor Franz Hess 1936 1 1) 10 12 100 1 10 15 (Knee) 10 18 (Ankle) 1) Knee Knee X 526
2 Hillas 3) 1 1) 100 X 2) 2. 2 Hillas 3) B L, v evbl Hillas B L / 4) Hillas 2 1984 3 1 101 9 527
3 3 10 10 12 10 13 10 10 16 10 18 X 3 10 5 3 Pavelin Bond 5), 6) AM AE DQ 7) 9) CANGAROO H.E.S.S., MAGIC, VERI- TAS X X 3. AE X 2005 7 10 10) X Astro-E2 JAXA X NASA Goddard Space Flight Cen- 528
ter Astro-E2 2 2000 2 10 Astro-E Astro-E 10 Astro-E Astro-E2 2 10 X X X CCD (X-ray Imaging Spectrometer; XIS) 0.3 10 X X (Hard X-ray Detector; HXD) X 4 X (Magnetic Cataclysmic Valiables; MCV) MCV 4 10 5 X X X X MCV AE 2 33 11) MCV 20 MCV AE 10 26 12) XMM-Newton X X 13) 101 9 529
X 2005 10 2006 10 AE 4. X X HXD X HXD AE X HXD X HXD HXD X CCD 1 0.3 X HXD 0.20 0.02 0.02 X HXD X 0.02 X X HXD X X X HXD X X HXD X X X AE 33 33 33 33 530
5 AE X CCD X 2 X CCD 2 X 4 0 (folding) 5 33 2 0 1 33 2 66 33 5 5 5 c 2 1 1 5 XIS XIS X CCD X XIS 8 33 AE 1 101 9 531
XIS HXD HXD 60 14) 1 7 13 5 1 JAXA 5 c 2 5 HXD XIS/HXD HXD 6 AE 33.6 AE 33.1 AE X 532
7 X 15) AE X X 5. X 5 X HXD XIS HXD X X HXD 5 2 2 6 X 0.1 0.01 X 15) AE X 7 0.1 8 NASA AE (credit Casey Reed NASA). 101 9 533
X 0.1 AE X X 6. 20 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, 1359 7) 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, 475 10) Mitsuda K., et al., 2007, PASJ 59, S1 11) Patterson J., 1979, ApJ 234, 978 12) de Jager O. C., 1994, ApJS 90, 775 13) Itoh K., et al., 2006, ApJ 639, 397 14) Terada Y., et al., 2008, PASJ 60, S25 15) Possenti A., et al., 2002, A&A 387, 993 16) http: / / www. nasa. gov / centers / goddard / news / topstory/2007/whitedwarf pulsar.html 17) http://www.heal.phy.saitama-u.ac.jp/ 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