High Energy Astrophysics: problems and expectations

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High Energy Astrophysics problems and
expectations

• By Catherine Cesarsky

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• Supernovae
• Rates with Ti44 lines (T1/2 60 years)
• Nuclear lines from 56 Co decay
• Cosmic ray acceleration electrons or nuclei?
• Effect of cosmic rays on SN evolution

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• Gamma ray bursts
• Polarization, physics of jet formation
• Formation of stars and elements in the early
  universe (gamma ray bursts, X ray lines, optical
  and infrared observations)

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• Galactic Center
• Gamma rays from Sag A?
• Central regions diffuse emission (hot gas or
  fast electrons) or superposition of sources?
• Positronium and galactic fountain

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• X Ray background
• Sources of high energy part of x ray background
  (highly obscured active nuclei?)

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• Accretion and black holes
• Cooling flows in center of galaxy clusters?
• Intermediate mass black holes ultraluminous X
  ray sources? (or are they micro blazars?)
• Black holes rotation, temporal studies and QPOs.

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• Dark matter and missing baryonic matter
• Intermediate mass black holes, remnants of Pop.3
• Warm intergalactic gas
• Dark matter distribution in clusters of galaxies,
  and large scale structure at high z, using
  clusters (X rays, SZ effect, weak lensing)
• gtConstraints on O, ? , quintessence,
  complementary to CMB and supernovae