The Evolving Universe Structure And Evolution of the Universe Roadmap 2000 2
The Evolving Universe Structure And Evolution of the Universe Roadmap 2000 2
United States National Aeronautics And Space Admi
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A major challenge for the future is to extend this technique to many more objects and use it to measure the masses and spins of the central black holes. Observations of lower power (but much closer) galactic nuclei are also allowing us to see the outer parts of accretion disks and to understand how gaseous fuel is supplied to the central black hole. Recent VLBI experiments from the ground have detected intense water emission lines, amplified by a natural maser pro- cess, from several of these s...ources. This has enabled us to mea- sure the mass of the central black hole with unprecedented accuracy. It is intended to extend this technique to study more x H&d CAMPAIGNS: Di Discover how gas flou's in disks and how cosmic jets are formed. IN RECENT YEARS THERE HAS BEEN ABUNDANT observational evidence, much of it garnered from space by SEU missions, to support the hypothesis that gas accretes onto compact objects (black holes, neutron stars, and white dwarfs) via accretion disks. For stellar objects, the gas derives from a normal, companion star.
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