Astrophysics (index)

Jeans Length

(critical radius below which gravity will collapse a cloud)

The Jeans Length is James Jeans' calculation of the radius of a cloud at which pressure balances Gravity.

       15kBT
λJ = √ —————
       4πGμρ

Where:

  • kB the is Boltzmann Constant (k).
  • T is the Temperature of the cloud.
  • ρ is the mass density of the cloud.
  • μ is the molecular mass.
  • G is the gravitational constant.

(physics,clouds,limit)
http://en.wikipedia.org/wiki/Jeans_length

Referenced by:
Dense Core

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