On chromospheric heating mechanisms of 'basal Flux' Stars

摘要

Several Pieces of evidence have been pieced together over recent years to support the notion that the chromospheric emission measured from stars with convection zones results in part from the upward propagation and dissipation of acoustic waves. One argument, based on a statistical analysis of available UV data of such stars across the H-R diagram, suggests the presence of an omnipresent "basal" level of chromospheric heating, which has been postulated as resulting from nonlinear acoustic wave heating.