The Radio-X-ray Relation in Cool Stars: Are we headed toward a divorce?

TL;DR

This paper reviews the relationship between X-ray and radio emissions in cool stars, focusing on deviations from the established Güdel-Benz relation, to inform future observations with advanced radio telescopes.

Contribution

It synthesizes current knowledge on X-ray and radio emission correlations in cool stars and discusses reasons for deviations from the Güdel-Benz relation.

Findings

Some cool stars breach the Güdel-Benz relation.

The correlation varies among different types of cool stars.

Implications for future radio observatories are discussed.

Abstract

This Cool Stars 16 splinter session was devoted to reviewing our current knowledge of correlated X-ray and radio emission from cool stars in order to prepare for new large radio observatories such as the EVLA. A key interest was to discuss why the X-ray and radio luminosities of some cool stars are in clear breach of a correlation that holds for other active stars, the so-called G\"udel-Benz relation. This article summarizes the contributions whereas the actual presentations can be accessed on the splinter website (http://cxc.harvard.edu/cs16xrayradio/).