This function returns the Component of dynamical LSR motion in the direction of R2000,D2000. The result is $+$ve when the dynamical LSR is receding from the given point on the sky.

double palRvgalc( double r2000, double d2000 )

r2000 = double (Given)

d2000 = double (Given)

Component of dynamical LSR motion in direction R2000,D2000 (km/s).

• The Local Standard of Rest used here is a point in the vicinity of the Sun which is in a circular orbit around the Galactic centre. Sometimes called the " dynamical" LSR, it is not to be confused with a " kinematical" LSR, which is the mean standard of rest of star catalogues or stellar populations.

• The orbital speed of 220 km/s used here comes from Kerr & Lynden-Bell (1986), MNRAS, 221, p1023.