An Improved Line-Strength Parameterization in Hot-Star Winds

Publisher Website
Google Scholar
Abstract
An alternative is suggested for the current standard for parameterizing the overall strength of the line opacity in hot-star winds, the so-called CAK κ parameter. The objective is a better conceptualization of the physical effects that produce dramatic differences in the mass-loss rates between B, 0, and Wolf-Rayet stars. The approach identifies a dimensionless line-strength parameter ‾Q whose value is estimable from first principles and is fairly constant, nominally 2 × 103, and is proportional to metallicity. The order of this value derives immediately from the coherent amplification inherent in any resonance. This does not represent a new theory, but a conceptual map is laid out for understanding and constraining mass-loss rates of all line-driven winds. This is especially pertinent for unlocking the mystery of why Wolf-Rayet stars experience such copious mass loss despite their sub-0 class luminosity.

This publication has 0 references indexed in Scilit: