vgsr_to_vhel

gala.coordinates.vgsr_to_vhel(coordinate, vgsr, vcirc=<Quantity 220.0 km / s>, vlsr=<Quantity [ 10., 5.25, 7.17] km / s>)

Convert a radial velocity in the Galactic standard of rest (GSR) to a barycentric radial velocity.

Parameters:

coordinate : SkyCoord

An Astropy SkyCoord object or anything object that can be passed to the SkyCoord initializer.

vgsr : Quantity

GSR line-of-sight velocity.

vcirc : Quantity

Circular velocity of the Sun.

vlsr : Quantity

Velocity of the Sun relative to the local standard of rest (LSR).

Returns:

vhel : Quantity

Radial velocity in a barycentric rest frame.