Dark Matter Halo & Galaxy Rotation Curve Simulator

🌌 Interactive Star Dynamics Visualizer

Radius: 15.0 kpc
v_Orbital: 220.5 km/s

DM Halo Mass (log M_☉) 12.00

Halo Concentration (c) 12.0

Disk Mass (10¹⁰ M_☉) 6.0

Disk Scale Length (kpc) 3.5

Bulge Mass (10¹⁰ M_☉) 1.0

Max Sampling Radius (kpc) 30

📈 Rotation Curve Decomposition (v - r)

Disk

Bulge

Halo

Total

Disk Peak Velocity 165.2 km/s Baryonic mass dominant peak

DM Halo v @ 20 kpc 210.4 km/s NFW profile contribution

Total v @ 20 kpc 232.8 km/s Canonical proof point

Flatness Ratio (v₃₀ / v_peak) 0.94 0.9+ signifies flat halo curve

Physics Principle: Standard Newtonian mechanics predicts that beyond the luminous disk, stellar orbital speed should decay as v(r) ∝ 1/√r (Keplerian decline). Observed flat galactic rotation curves prove the presence of an extended, massive Navarro-Frenk-White (NFW) Dark Matter Halo envelopment.