| Active
galaxies |
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|
|
|
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| Milky Way (normal galaxy) |
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| luminosity ~ 2 x 1010
L |
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| 90% galaxies normal |
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| active galaxies (10%) |
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| much higher luminosities |
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| ~ 1% very high luminosity nuclei (x 1000) |
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| radiation across e-m spectrum |
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| - nonstellar
(not just combined radiation of many stars |
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| Sun
4x1026 watts |
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| Milky Way 1037
watts 2 x 1010
L |
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| Active Galaxies 1036 – 1038
watts 109 – 1012
L |
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| Quasars 1038 - 1042
watts 1011 – 1013
L |
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