Local Standard of Rest
A star's velocity
relative to the LSR can be divided into three components: , the velocity in/out from the center;
, the velocity tangent to the orbit; and Z,
the velocity perpendicular to the orbit.
By definition, the and Z components
are equal to zero because the particle is moving in a uniform circular motion in
the plane of the Milky Way. Thus, we want to find the component of the velocity