Particle tracers
Over the course of the simulation, the gas, sink and star particles record some information about their evolution. These are updated for a given particle every time it is active. The GEAR tracers module is located in the directory src/tracers/GEAR/. To enable GEAR tracers, add --with-tracers=GEAR to your configuration options.
Currently, GEAR tracers are only implemented for sink particles.
Sink tracers
The tracers track the long-term evolution of the sinks’ accretion rates and SFR between different time slices. These tracers are used to capture the high-frequency variability of the the accretion rate and SFR that might be lost between snapshots.
The time slices are specified by Snapshots:recording_triggers_sink. By default, the number of recording time slices is 3. You can change this value in src/tracers_triggers.h and then recompile the code. These outputs are arrays of length num_snapshot_triggers_sink.
Name |
Description |
Units |
Comments |
|---|---|---|---|
|
Accretion rates averaged over the
snapshot trigger intervals
|
[U_M U_T^{-1}] |
Averaged over the period set by the
first N snapshot triggers.
|
|
Star formation rates averaged over the
snapshot trigger intervals
|
[U_M U_T^{-1}] |
Averaged over the period set by the
first N snapshot triggers.
|