Non-thermal radio emission from OB stars: an observer's view

TL;DR

This paper reviews radio observations of OB stars, emphasizing non-thermal emissions, and discusses open questions in the field that future radio telescope upgrades may help address.

Contribution

It provides a comprehensive review of existing radio data on OB stars, highlighting the significance of non-thermal emissions and future prospects with new radio instruments.

Findings

Identification of non-thermal radio emitters among OB stars

Discussion of open questions in understanding OB star radio emissions

Potential for future discoveries with upgraded radio telescopes

Abstract

Some early-type stars are detectable radio emitters; their spectra can present both thermal and non-thermal contributions. Here I review the public radio data on OB stars, focusing on the non-thermal sources. The analysis of the statistical results gives rise to many open questions that are expected to be addressed, at least in part, with the upgrades of current radio telescopes and the upcoming new generation instruments.