Freefall Time Available

Class providing models of the time available for freefall (in Gyr) in the cooling flow calculation, analogous to the cooling time available class but governing the freefall radius. This time, typically anchored to halo formation, enters the computation of the freefall radius and thereby determines which cooling regime applies. The rate of increase of this available time is also provided for use in ODE-based evolution of the hot gas atmosphere.

Default implementation: freefallTimeAvailableHaloFormation

Methods

timeAvailable → double precision

Returns the time available for freefall in cooling calculations in node.

  • type(treeNode), intent(inout) :: node

timeAvailableIncreaseRate → double precision

Returns the rate at which the time available for freefall in cooling calculations increases in node.

  • type(treeNode), intent(inout) :: node

freefallTimeAvailableHaloFormation

A freefall time available class in which the time available for freefall is equal to

\[t_\mathrm{available} = t - t_\mathrm{form},\]

where \(t_\mathrm{form}\) is the time at which the halo formed (see Section ).

(Default implementation)