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Journal Article

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

Philip Massey, K. A. G. Olsen and J. Wm. Parker
Publications of the Astronomical Society of the Pacific
Vol. 115, No. 813 (November 2003), pp. 1265-1268
DOI: 10.1086/379024
Stable URL:
Page Count: 4
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ABSTRACT We report the discovery of a relatively faint ( \documentclass{aastex} \usepackage{amsbsy} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{bm} \usepackage{mathrsfs} \usepackage{pifont} \usepackage{stmaryrd} \usepackage{textcomp} \usepackage{portland,xspace} \usepackage{amsmath,amsxtra} \usepackage[OT2,OT1]{fontenc} \newcommand\cyr{ \renewcommand\rmdefault{wncyr} \renewcommand\sfdefault{wncyss} \renewcommand\encodingdefault{OT2} \normalfont \selectfont} \DeclareTextFontCommand{\textcyr}{\cyr} \pagestyle{empty} \DeclareMathSizes{10}{9}{7}{6} \begin{document} \landscape $V=15.5$ \end{document} ) early‐type WN star in the SMC. The line strength and width of He ii λ4686 emission are similar to those of the other SMC WN stars, and the presence of N v λλ4603, 4619 emission (coupled with the lack of N iii) suggests that this star is of spectral type WN3–4.5, and thus is similar in type to the other SMC WR stars. Also like the other SMC WN stars, an early‐type absorption spectrum is weakly present. The absolute magnitude is comparable to that of other (single) Galactic early‐type WN stars. The star is located in the Hodge 53 OB association, which is also the home of two other SMC WN stars. This star, which we designate SMC‐WR12, was actually detected at a high significance level in an earlier interference‐filter survey, but the wrong star was observed as part of a spectroscopic follow‐up, and this case of mistaken identity resulted in its Wolf‐Rayet nature not being recognized until now.

Notes and References

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