标题： 发现麦哲伦云中的第十二颗沃尔夫-拉耶星 显示英文标题

标题： The Discovery of a Twelfth Wolf-Rayet Star in the Small Magellanic Cloud

摘要： 我们报告了在大麦哲伦云（SMC）中发现了一颗相对较暗（V=15.5）的早期型WN星。He II λ4686发射线的强度和宽度与其他SMC WN星相似，并且N V λ4603,19发射线的存在（结合N III的缺乏）表明这颗星的光谱类型为WN3-4.5，因此与其它SMC沃尔夫-拉叶星类似。同样地，这颗星也有一个弱的早期型吸收光谱。其绝对星等与其它银河系早期型WN星相当。这颗星位于Hodge 53 OB星协中，该星协也是另外两颗SMC WN星的所在地。我们将这颗星命名为SMC-WR12，它实际上在早先的干涉滤光片巡天中以高显著性水平被探测到，但由于错误观测了另一颗星作为后续光谱观测的一部分，导致直到现在才认识到它的沃尔夫-拉叶特性。 显示英文摘要

摘要： We report the discovery of a relatively faint (V=15.5) early-type WN star in the SMC. The line strength and width of He II lambda 4686 emission is similar to 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 type WN3-4.5, and thus is similar in type to the other SMC WRs. 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 WNs. The star is located in the Hodge 53 OB association, which is also the home of two other SMC WNs. 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 followup, and this case of mistaken identity resulted in its Wolf-Rayet nature not being recognized until now.