The Monoceros radio loop: temperature, brightness, spectral index and distance

TL;DR

This study estimates the temperature, brightness, and spectral index of the Monoceros radio loop at multiple frequencies, confirming its non-thermal origin through analysis of radio survey data.

Contribution

The paper provides new measurements of the Monoceros radio loop's temperature, brightness, and spectral index across three frequencies, enhancing understanding of its physical properties.

Findings

Spectral index confirms non-thermal emission.

Temperatures and brightnesses calculated at 1420, 820, and 408 MHz.

Spectral analysis supports non-thermal origin of the loop.

Abstract

In this paper we estimated the temperatures and brightnesses of the Monoceros radio loop at 1420, 820 and 408 MHz. Linear spectrum is estimated for mean temperatures versus frequency between 1420, 820 and 408 MHz. The spectral index of Monoceros loop is also obtained. The brightness temperatures and surface brightnesses of the loop are computed using data taken from radio-continuum surveys at the three frequencies. The spectral index of the loop is also obtained from $T-T$ plots between 1420 - 820, 1420 - 408 and 820 - 408 MHz. The obtained results confirm non-thermal origin of the Monoceros radio loop.