Hydrogen Stark broadened Brackett lines

TL;DR

This paper presents a comprehensive computation of hydrogen Brackett series line shapes under stellar conditions using the Model Microfield Method, bridging impact and static broadening regimes.

Contribution

It introduces a novel application of the Model Microfield Method to compute Stark broadened hydrogen lines, including ion dynamic effects, for stellar atmospheres.

Findings

Provides detailed line shape calculations from core to wings.

Bridges impact and static broadening regimes.

Enhances understanding of hydrogen line profiles in stellar environments.

Abstract

Stark broadened lines of the hydrogen Brackett series are computed for the conditions of stellar atmospheres and circumstellar envelopes. The computation is performed within the Model Microfield Method, which includes the ion dynamic effects and makes the bridge between the impact limit at low density and the static limit at high density and in the line wings. The computation gives the area normalized line shape, from the line core up to the static line wings.