Broadband radio study of the North Polar Spur: Origin of the spectral turnover with insights into the X-ray and Gamma-ray spectra

Iwashita Ryoji, Kataoka Jun, Sofue Yoshiaki

The North Polar Spur (NPS) is a giant structure that is clearly visible in both radio and X-ray all-sky maps. We analyzed broadband radio observations covering a range between 22 M…