| Isothermal Gas Spheres |
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| • | Fit
the function to an observed distribution. |
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| – | N(q) = ½ at q=3, or core radius R1/2
=3 α. |
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| • | To
get a central mass density then also need |
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| to
measure the velocity distribution.
From |
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| equipartition
½ m<v2>=3/2 kT. So: |
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