The radio spectrum of Sgr A*

We discuss the radio spectrum of Sgr A* \index{Sgr A*, radio spectrum} in the frequency range between $\approx 1\mathrm{G}\mathrm{H}\mathrm{z}$ and $\approx 1000\mathrm{G}\mathrm{H}\mathrm{z}$, show that it can be explained by optically thin synchrotron radiation \index{Sgr A*, synchrotron radiation, optically thin} of relativistic electrons, and point toward a possible correlation between the spectrum of Sgr A* and larger-scale ($\text{la}50\mathrm{p}\mathrm{c}$) radio emission from the Galactic Center \index{Galactic Center} region.