| Fundamental Plane |
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| � | Luminosities,
surface brightness, central |
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| velocity
distribution, (and others), are |
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| correlated,
hence the term �fundamental |
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| plane.�� Ellipticals populate a plane in |
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| parameter
space.� BIG area of research � very |
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| useful
tool and helps us understand galaxies. |
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| � | Faber
& Jackson (1976) is a classic in this area |
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| (you
might want to look up and read this one): |
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| � L ~ σx where x ≈4 |
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| � | So,
get dispersion from spectrum, get |
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| luminosity,
and with magnitude get distance! |
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