WR 140 in the Infrared

TL;DR

Infrared observations of WR 140 reveal the evolution of its wind-collision region and dust formation, enhancing understanding of its dynamic stellar environment through spectral line profiles and multiwavelength imaging.

Contribution

This paper presents new infrared spectroscopic and imaging data of WR 140, focusing on wind-collision dynamics and dust production during periastron passages.

Findings

Changing He I line profiles near periastron

Multiwavelength imaging of dust formation

Insights into wind-collision region evolution

Abstract

Observations in the infrared have played a significant role in the development of our understanding of WR140. Two sets of observations are described here: the changing profile of the 1.083-{\mu}m He I line observed for the 2009 campaign to study evolution of the wind-collision region near periastron passage, and multiwavelength photometry and imaging of the dust made by WR140 in previous periastron passages.