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Bahcall
(1977) describes distributions as
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truncated
isothermal distributions:
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Where
f(r) is the projected distribution
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normalized
to 1 at r=0, and C is a constant
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that
makes N(r) = 0 at some radius.
Results
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in
steepening distribution in outer regions vs.
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pure
isothermal soultion.
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R1/2 = 150-400 kpc (220 kpc for Coma)
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