This is regarding an accretion disc orbiting a star. In the z (vertical) direction there is a hydrostatic equilibrium.(adsbygoogle = window.adsbygoogle || []).push({});

[itex]\frac{1}{ρ}[/itex][itex]\frac{∂P}{∂z}[/itex] = -[itex]\frac{GMz}{(R^{2} + z^{2})^{3/2}}[/itex]

The right hand side of the expression is the Gravitational potential energy and the left side is the pressure gradient.

Can someone explain to me how the pressure gradient works in an accretion disc as I don't understand how the pressure gradient of an accretion disc is strong enough to equal the gravitational potential energy of the star?

http://www.maths.qmul.ac.uk/~rpn/ASTM735/lecture3.pdf [Broken]

More information is on Section 3.3.1 in the lecture note.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Hydrostatic Equilibrium in an Accretion Disc

Loading...

Similar Threads for Hydrostatic Equilibrium Accretion |
---|

A Where can I find a text about heavy elements migration? |

I Eddington limit |

A Questions about Accretion disk |

I Models of accretion disc emissions contradicted by experiment |

**Physics Forums | Science Articles, Homework Help, Discussion**