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• |
Three
views of the
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relationship
from Inger
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Jorgensen
et al. (1997).
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The
top is “face-on”
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and
the other two views
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are
projections.
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• |
As
the relationship
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involves
Luminosity it
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is
a distance indicator.
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• |
Physical
origin of
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interest
for
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understanding
early
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type
galaxies.
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