The properties of single WO stars

TL;DR

This paper presents the first homogeneous spectral analysis of single WO stars, a rare late-stage massive star type, using advanced atmosphere modeling to better understand their properties and evolutionary status.

Contribution

It provides the first detailed non-LTE atmosphere modeling of single WO stars, offering new insights into their physical characteristics and evolutionary phase.

Findings

Initial atmospheric parameters derived for single WO stars

Enhanced understanding of their spectral properties

Implications for massive star evolution models

Abstract

The enigmatic oxygen sequence Wolf-Rayet (WO) stars represent a very late stage in massive star evolution, although their exact nature is still under debate. The spectra of most of the WO stars have never been analysed through detailed modelling with a non-local thermodynamic equilibrium expanding atmosphere code. Here we present preliminary results of the first homogeneous analysis of the (apparently) single WOs.