Titlebook: Matter in the Universe; Ph. Jetzer,K. Pretzl,R. Steiger Book 2002 Springer Science+Business Media B.V. 2002 Big Bang.Cosmology.Dark matter

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Weak and Strong Lensing StatisticsAfter a brief introduction to gravitational lensing theory, a rough overview of the types of gravitational lensing statistics that have been performed so far will be given. I shall then concentrate on recent results of galaxy-galaxy lensing, which indicate that galactic halos extend much further than can be probed via rotation of stars and gas.

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AxionsAxions are one of the few particle-physics candidates for dark matter which are well motivated independently of their possible cosmological role. A brief review is given of the theoretical motivation for axions, their possible role in cosmology, the existing astrophysical limits, and the status of experimental searches.

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Space Sciences Series of ISSIhttp://image.papertrans.cn/m/image/627809.jpg

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Book 2002only plenary sessions with typically half­ hour presentations and ample time for discussions. The last day was devoted to conclusions and future objectives. The knowledge of the amount and nature of matter present in the universe is undoubtedly one of the most relevant topics oftoday‘s astrophysics

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