A Dust Shell around the Early Type Wolf-Rayet Star WR:19

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

Infrared photometry of the WC4-type Wolf-Rayet star WR 19 (LS 3) in 1988-90 shows evidence for an expanding dust shell in its wind, similar to those observed from late-type WR stars like WR 48a (WC8), WR 140 (WC7 + 04) and WR 137 (WC 7+). This demonstrates that dust formation by Wolf-Rayet stars is not restricted to later WC subtypes and is more common than hitherto supposed.

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