Galactic synchrotron distribution derived from 152 HII region absorption features

We derive the synchrotron distribution in the Milky Way disk from HII region absorption observations over −40° < l < 40° at six frequencies of 76.2, 83.8, 91.5, 99.2, 106.9, and 114.6 MHz with the GaLactic and Extragalactic All-sky Murchison widefield array survey (GLEAM). We develop a new method of emissivity calculation by taking advantag..