The Ejecta Nebula Around the Wolf-Rayet Star WR 71
Robert A. Fesen, Manuel C. Peitsch, Martin R. Pugh, Bray Falls, Marcel Drechsler

TL;DR
This paper presents deep optical imaging of the large, ejecta-rich nebula around Wolf-Rayet star WR 71, revealing its structure and infrared correlation, and suggests that deeper imaging could uncover more such nebulae.
Contribution
It provides detailed optical images of WR 71's nebula, demonstrating the potential for deeper surveys to discover more WR ring nebulae and improve understanding of their formation.
Findings
Nebula is a large, crescent-shaped structure around WR 71.
Infrared data coincides with brightest optical emission regions.
Deeper imaging may reveal more WR nebulae.
Abstract
We present deep H and [O III] images of the ejecta rich nebulosity associated with the suspected runaway and binary Wolf-Rayet star WR~71 (HD 143414). In H emission, the nebula appears as a crescent shaped, broken ring of clumpy emission some in angular size centered to the south and west of the WR star. At a Gaia estimated distance of 4.27 kpc, the nebula has physical dimensions of pc making it one of the larger known ejecta rich WR ring nebulae. Our [O III] image also show considerable surrounding faint nebulosity much of which may be unrelated to the WR star. A comparison of the nebula's optical appearance with that seen in WISE 22 m data shows infrared coincidence with the nebula's brightest [O III] emission features. Deep H and [O III] images like those presented here suggests that new and substantially deeper imaging…
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Taxonomy
TopicsAstronomical Observations and Instrumentation · Stellar, planetary, and galactic studies · Astrophysical Phenomena and Observations
