INTEGRAL Science Results and Connections to Suzaku(Chapter 11. Synergy with Suzaku and Other Missions, The Extreme Universe in the Suzaku Era)

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INTEGRAL has now completed 4 years of successful operations, producing new results on nucleosynthesis sources, on accreting binaries in the Galaxy, and on sources of high-energy emission where matter in the line of sight absorbs lower-energy emission. The measurements of continuum emission along the Galactic ridge illustrate the importance of a broader bandwidth for such high-energy astronomy, extending well beyond the thermal regime above 100keV. Known X-ray sources with their spectra declining towards higher energies do not play a role for emission above 100keV. Yet, unresolved emission from the Galactic ridge remains, even if underlying emission from positron annihilation is accounted for. INTEGRAL observations found embedded high-energy sources in the Galaxy, through more-penetrating emission above≃20keV. Emission from active galaxies, which has been shown to dominate the cosmic-diffuse background<20keV, is poorly measured above this energy, and among INTEGRAL's main targets. We discuss these findings and their connections to Suzaku, but also INTEGRAL's science results on nucleosynthesis sources and positron annihilation in the Galaxy, which only become accessible with such dedicated MeV-gamma-ray instrumentation.
理論物理学刊行会の論文
2007-12-19