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## Summary:

- I have a question about the virial theorem as applied to a cluster of stars.

## Main Question or Discussion Point

Anyone able to help if I provide you with more details?

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- Thread starter Alfie114
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- #1

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## Summary:

- I have a question about the virial theorem as applied to a cluster of stars.

Anyone able to help if I provide you with more details?

- #2

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You might need to provide a bit more detail about your question.

- #3

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The total mass of the stars and the gas is different but we can assume that M sub g = f*M sub *

If the system is unrotating and in equilibrium how do we calculate the kinetic energy in terms of r sub c, f and M sub *?

We can take 2KE + PE = 0 where KE = (-3/5) (GM^2/R) and PE = (3kT/2)*n where n is the total number of particles = (M/mu*m sub H) where mu=1 and m sub H is the mass of a hydrogen atom.

- #4

Arman777

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You need to use math latex notation. Its hard to understand your equations like this.

The total mass of the stars and the gas is different but we can assume that M sub g = f*M sub *

If the system is unrotating and in equilibrium how do we calculate the kinetic energy in terms of r sub c, f and M sub *?

We can take 2KE + PE = 0 where KE = (-3/5) (GM^2/R) and PE = (3kT/2)*n where n is the total number of particles = (M/mu*m sub H) where mu=1 and m sub H is the mass of a hydrogen atom.

- #5

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Ok I've got these where omega is the potential energy

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