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- astrophysics - high energy astrophysical phenomena8
- fos: physical sciences3
- high energy astrophysical phenomena (astro-ph.he)3
- seyfert galaxies3
- 79 astrophysics, cosmology and astronomy accretion disks2
- accretion disks2
- active galactic nuclei2
- astrophysics::high energy astrophysical phenomena2
- commercial treaties2