| Luminosity Distributions -- Bulges |
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| • | Elliptical
galaxies have an apparently simple |
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| structure,
can be characterized by their luminosity |
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| distribution. Maximum in center, and falls off: |
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| • | Hubble’s
Law: |
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| – | I/I0 = [(r/a) + 1] -2 |
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| • | De Vaucouleur’s r1/4 Law: |
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| – | Log (I/Ie) = -3.33[(r/re)1/4
– 1] |
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