DimensionlessUnitSystem¶
-
class
gala.units.
DimensionlessUnitSystem
[source]¶ Bases:
gala.units.UnitSystem
Methods Summary
decompose
(q)A thin wrapper around
astropy.units.Quantity.decompose()
that knows how to handle Quantities with physical types with non-default representations.get_constant
(name)Retrieve a constant with specified name in this unit system.
to_dict
()Return a dictionary representation of the unit system with keys set by the physical types and values set by the unit objects.
Methods Documentation
-
decompose
(q)¶ A thin wrapper around
astropy.units.Quantity.decompose()
that knows how to handle Quantities with physical types with non-default representations.
-
get_constant
(name)[source]¶ Retrieve a constant with specified name in this unit system.
- Parameters
- namestr
The name of the constant, e.g., G.
- Returns
- constfloat
The value of the constant represented in this unit system.
Examples
>>> usys = UnitSystem(u.kpc, u.Myr, u.radian, u.Msun) >>> usys.get_constant('c') 306.6013937879527
-