Glowing Vortices—Accretion Disks
Accretion disks are very familiar in astronomy these days; they are believed to exist around black holes, both in binary systems and at the centre of active galactic nuclei. They are also believed to form within many interacting binary stars; particularly cataclysmic variables or CVs. What’s perhaps not quite so well known is that the hot gases which make up an accretion disk can produce emission lines of hydrogen and what’s more these emission lines can have very striking profile shapes. They are in fact often double-peaked with what’s called a central reversal in between; they also have broad extensive wings.
KeywordsRadial Velocity Emission Line Accretion Disk White Dwarf Orbital Velocity
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