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MDoppler

The MDoppler class describes the radial velocity of an astronomical object in a variety of special astronomical ``Doppler'' shifts. It can be generated from quasi velocities; or from a dimensionless quantity, interpreted as a fraction of the velocity of light.

Conversion to a ``real'' radial velocity is possible with this class. In the following F stands for $\nu$/$\nu_{0}^{}$, where $\nu_{{0}}^{}$ is the rest frequency.

MDoppler
Code	Description	Frame info
RADIO	radio definition: 1 - F
Z	redshift: -1 + 1/F
RATIO	frequency ratio: F
BETA	relativistic: (1 - F2)/(1 + F2)
GAMMA	(1 + F2)/2F
OPTICAL	= Z
RELATIVISTIC	= BETA
DEFAULT	= RADIO