DF (galpy.df)¶
galpy.df contains tools for dealing with distribution functions of
stars in galaxies. It mainly contains a number of classes that define
different types of distribution function, but galpy.df.jeans also
has some tools for solving the Jeans equations for equilibrium
systems.
General instance routines for all df classes¶
Two-dimensional, axisymmetric disk distribution functions¶
Distribution function for orbits in the plane of a galactic disk.
Specific distribution functions¶
Two-dimensional, non-axisymmetric disk distribution functions¶
Distribution function for orbits in the plane of a galactic disk in
non-axisymmetric potentials. These are calculated using the technique
of Dehnen 2000,
where the DF at the current time is obtained as the evolution of an
initially-axisymmetric DF at time to in the non-axisymmetric
potential until the current time.
Three-dimensional disk distribution functions¶
Distribution functions for orbits in galactic disks, including the vertical motion for stars reaching large heights above the plane. Currently only the quasi-isothermal DF.
General instance routines¶
Specific distribution functions¶
The distribution function of a tidal stream¶
From Bovy 2014; see Dynamical modeling of tidal streams.
General instance routines¶
- __call__
- __init__
- calc_stream_lb
- callMarg
- density_par
- estimateTdisrupt
- find_closest_trackpoint
- find_closest_trackpointLB
- freqEigvalRatio
- gaussApprox
- length
- meanangledAngle
- meanOmega
- meantdAngle
- misalignment
- pangledAngle
- plotCompareTrackAAModel
- plotProgenitor
- plotTrack
- pOparapar
- ptdAngle
- sample
- sigangledAngle
- sigOmega
- sigtdAngle
- subhalo_encounters
The distribution function of a gap in a tidal stream¶
From Sanders, Bovy, & Erkal 2015;
see Modeling gaps in streams. Implemented as a subclass of
streamdf. No full implementation is available currently, but the
model can be set up and sampled as in the above paper.