Numerical Simulation of Viscous Shocked Accretion Flows Around Black Holes

The work developed in this thesis addresses very important and relevant issues of accretion processes around black holes. Beginning by studying the time variation of the evolution of inviscid accretion discs around black holes and their properties, the author investigates the change of the pattern of the flows when the strength of the shear viscosity is varied and cooling is introduced. He succeed

Dark Matter, Dark Energy - The Dark Side of the Universe part 5 to 8

There's more to the universe than meets the eyeâa lot more. In recent years, scientists have discovered that 95% of the contents of the cosmos are invisible to our current methods of direct detection. Yet something is holding galaxies and galaxy clusters together, and something else is causing space to fly apart. Scientists call these invisible components dark matter and dark energy dark be

A Constrained Space Exploration Technology Program: A Review of NASA's Exploration Technology Development Program

In January 2004, President George W. Bush announced the Vision for Space Exploration (VSE), which instructed NASA to Extend human presence across the solar system, starting with a human return to the Moon by the year 2020, in preparation for human exploration of Mars and other destinations, among other objectives. As acknowledged in the VSE, significant technology development will be necessary to

Solar Flare Magnetic Fields and Plasmas free ebook


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Solar Flare Magnetic Fields and Plasmas

This volume is devoted to the dynamics and diagnostics of solar magnetic fields and plasmas in the Suns atmosphere. Five broad areas of current research in Solar Physics are presented: (1) New techniques for incorporating radiation transfer effects into three-dimensional magnetohydrodynamic models of the solar interior and atmosphere, (2) The connection between observed radiation processes occurri

An Introduction to Space Weather free ebook


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An Introduction to Space Weather

Space weather is an emerging field of space science focused on understanding societal and technological impacts of the solar-terrestrial relationship. The Sun, which has tremendous influence on Earth's space environment, releases vast amounts of energy in the form of electromagnetic and particle radiation that can damage or destroy satellite, navigation, communication and power distribution system

Mass-Transfer Induced Activity in Galaxies free ebook


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Mass-Transfer Induced Activity in Galaxies

Current research on the origin and evolution of active galaxies is comprehensively surveyed in this collaborative volume. Both of the proposed types of central activity - active galactic nuclei and starbursts - are analysed with a particular emphasis on their relationship to the large-scale properties of the host galaxy. The crucial question is what triggers and fuels nuclear activity now and at e