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A study of spiral galaxies seen edge-on has revealed that "halos" of cosmic rays and magnetic fields above and below the galaxies' disks are much more common than previously thought.An international t...
Powerful relativistic jets in spiral galaxies
galaxies: jets – BL Lacertae objects: general – quasars: general – galaxies: Seyfert – binaries: general
2011/10/9
The discovery of high-energy (E>100 MeV) gamma rays from Narrow-Line Seyfert 1 Galaxies (gamma-NLS1s) has confirmed the presence of powerful relativistic jets in this class of active galactic nuclei (...
Do giant spiral galaxies thwart clusters of young stars?（图）
giant spiral galaxies clusters young stars
2010/11/30
Astronomers in Scotland and Germany say simple physics may explain a long-standing paradox: why large clusters of young stars tend to reside in relatively small galaxies and not in giants like the Mil...
Dwarf and Normal Spiral Galaxies：are they Self-Similar?
Dwarf Normal Spiral Galaxies Self-Similar
2009/6/18
Dwarf and Normal Spiral Galaxies：are they Self-Similar?