The Discovery of a 12th Wolf‐Rayet Star in the Small Magellanic Cloud | Zendy

Philip Massey | Zendy; Knut Olsen | Zendy; J. W. Parker | Zendy

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The Discovery of a 12th Wolf‐Rayet Star in the Small Magellanic Cloud

Author(s) -

Philip Massey,

Knut Olsen,

J. W. Parker

Publication year - 2003

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/379024

Subject(s) - wolf–rayet star , physics , astrophysics , stars , small magellanic cloud , large magellanic cloud , star (game theory) , o type star , astronomy , equivalent width , emission spectrum , spectral line

We report the discovery of a relatively faint (V=15.5) early-type WN star inthe SMC. The line strength and width of He II lambda 4686 emission is similarto that of the other SMC WNs, and the presense of N V lambda 4603,19 emission(coupled with the lack of N III) suggests this star is of spectral typeWN3-4.5, and thus is similar in type to the other SMC WRs. Also like the otherSMC WN stars, an early-type absorption spectrum is weakly present. The absolutemagnitude is comparable to that of other (single) Galactic early-type WNs. Thestar is located in the Hodge 53 OB association, which is also the home of twoother SMC WNs. This star, which we designate SMC-WR12, was actually detected ata high significance level in an earlier interference-filter survey, but thewrong star was observed as part of a spectroscopic followup, and this case ofmistaken identity resulted in its Wolf-Rayet nature not being recognized untilnow.Comment: Accepted by PASP (November 2003 issue

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