Observational Study on the Central Subparsec-Scale Structure of Active Galactic Nucleus with Very Long Baseline Interferometer
Institution: | Hokkaido University |
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Department: | |
Year: | 2016 |
Posted: | 02/05/2017 |
Record ID: | 2064729 |
Full text PDF: | http://hdl.handle.net/2115/61697 |
Galaxies are fundamental elements of the universe, and consist of stars, gas, dark matter and supermassive black holes (SMBHs). It is important to understand galaxy formation and evolution when clarifying the evolution of universe. It is believed that stars are monotonically formed from gas in galaxies, and that galaxies evolve. However, from recent researches on galaxy formation and evolution, it is suggested that feedback effect that constrains star formation is a key process of galaxy evolution. One of important feedback effects is feedback from active galactic nucleus (AGN). AGN is a bright source at broad wavelength bands from radio to -ray in the galactic center. Typical size of AGN is 10