galpy.orbit.Orbit.vR¶

Orbit.vR(*args, **kwargs)[source]¶

Return radial velocity at time t.

Parameters:

t (numeric, numpy.ndarray or Quantity, optional) – Time at which to get the radial velocity. Default is the initial time.
ro (float or Quantity, optional) – Physical scale in kpc for distances to use to convert. Default is object-wide default.
vo (float or Quantity, optional) – Physical scale for velocities in km/s to use to convert. Default is object-wide default.
use_physical (bool, optional) – Use to override object-wide default for using a physical scale for output.
quantity (bool, optional) – If True, return an Astropy Quantity object. Default from configuration file.

Returns:

Radial velocity.

Return type:

float, numpy.ndarray or Quantity [*input_shape,nt]

Notes