class galpy.potential.AdiabaticContractionWrapperPotential(amp=1.0, pot=None, baryonpot=None, method='cautun', f_bar=0.157, rmin=None, rmax=50.0, ro=None, vo=None)[source]

AdiabaticContractionWrapperPotential: Wrapper to adiabatically contract a DM halo in response to the growth of a baryonic component. Use for example as:

dm= AdiabaticContractionWrapperPotential(pot=MWPotential2014[2],baryonpot=MWPotential2014[:2])


to contract the dark-matter halo in MWPotential2014 according to the baryon distribution within it. The basic physics of the adiabatic contraction is that a fraction f_bar of the mass in the original potential pot cools adiabatically to form a baryonic component baryonpot; this wrapper computes the resulting dark-matter potential using different approximations in the literature.

__init__(amp=1.0, pot=None, baryonpot=None, method='cautun', f_bar=0.157, rmin=None, rmax=50.0, ro=None, vo=None)[source]

NAME:

__init__

PURPOSE:

INPUT:

amp - amplitude to be applied to the potential (default: 1.)

pot - Potential instance or list thereof representing the density that is adiabatically contracted

baryonpot - Potential instance or list thereof representing the density of baryons whose growth causes the contraction

method= (‘cautun’) Type of adiabatic-contraction formula:

f_bar= (0.157) universal baryon fraction; if None, calculated from pot and baryonpot assuming that at rmax the halo contains the universal baryon fraction; leave this at the default value unless you know what you are doing

rmin= (None) minimum radius to consider (default: rmax/2500; don’t set this to zero)

rmax= (50.) maximum radius to consider (can be Quantity)

ro, vo= standard unit-conversion parameters

OUTPUT:

(none)

HISTORY:

2021-03-21 - Started based on Marius Cautun’s code - Bovy (UofT)