Pseudo Rotation Curve Connecting the Galaxy, Dark Halo, and Local Group

We construct a Galacto-Local Group rotation Curve, combining the Galactic rotation Curve with a diagram, where the galacto-centric radial velocities of the outer globular clusters and the member galaxies of the Local Group are plotted against their galacto-centric distances. The high-velocity ends of this pseudo rotation curve within a radius of R similar to 150 kpc are well traced by a rotation curve calculated for the NFW (Navaro, Frenk, White) and Burkert dark halo models. The NFW model indicates that the Galaxy's mass within 385 kpc, half the distance to M 31. is similar to 4 x 10(11) M-circle dot. High-velocity ends of the pseudo rotation curve for the entire Local Group up to 1.5 Mpc indicate an isothermal nature with a terminal velocity of similar to 200 km s(-1). In order for the Local Group to be gravitationally bound, an order-of-magnitude larger mass than those of the Galaxy and M 3 1 is required. This fact suggests that the Local Group contains dark matter of mass similar to 5 x 10(12) M-circle dot, filling the space between the Galaxy and M 31. The mass density of the Galactic dark halo becomes equal to that of the Local Group's dark matter at R similar to 100 kpc, beyond which the intracluster dark matter dominates. If we define the Galaxy's radius at this distance, the enclosed Galactic mass is similar to 3 x 10(11) M-circle dot.