vhel_to_vgsr

gala.coordinates.vhel_to_vgsr(coordinate, vhel, vsun)

Convert a velocity from a heliocentric radial velocity to the Galactic standard of rest (GSR).

Parameters:

coordinate : SkyCoord

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

vhel : Quantity

Barycentric line-of-sight velocity.

vsun : Quantity

Full-space velocity of the sun in a Galactocentric frame. By default, uses the value assumed by Astropy in Galactocentric.

Returns:

vgsr : Quantity

Radial velocity in a galactocentric rest frame.