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HI bubbles surrounding southern optical ring nebulae: Anon(WR 23) and RCW 52

Cappa, Cristina Elisabeth; Niemela, Virpi S.; Martin, Maria Cristina; McClure Griffiths, Naomi M. (EDP Sciences, 2005-12)

We analyze the interstellar medium in the environs of two hot and massive stars, HD 92809 (= WR 23, WC6) and LSS 1887 (O8V), which ionize the optical ring nebulae Anon(WR 23) and RCW 52, respectively. Our analysis is based ...