21 cm Radio Wave Observation on the Milky Way Rotation Curve

Nowadays, the scientific community has generally accepted the existence of dark matter. Astrophysicists investigate this assumption by astronomical observation. The galaxy rotation curve is one of the pieces of evidence for dark matter’s existence. The TLM18 telescope detects a 21 cm radio wave from the Milky Way to measure the rotation curve of the Milky Way. This article analyzes the frequency-power data to find out the rotation curve of the galaxy. The rotation curve is compared to existing theories, including the Kepler model, the exponential disk model, and the isothermal dark matter halo. Combining the exponential disk model with the isothermal dark matter halo, the calculation fits well with observation.