HD 152246, a new high-mass triple system – preliminary results

HD 152246, a new high-mass triple system – preliminary results
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HD 152246,一种新的高质量三重系统——初步结果

DOI:
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发表时间:
2013
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通讯作者:
H. Sana
H. Sana
中科院分区:
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文献类型:
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作者:
A. Nasseri;R. Chini;P. Harmanec;P. Mayer;T. Dembsky;H. Lehmann;H. Sana

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对o型(O9 III - IV)恒星HD 152246进行多历元、高分辨率(R ~ 5万)光谱分析表明,这是一个三联星系统,其中一个紧密的内对(Aa-Ab)具有圆形轨道,周期为6天,在一个53-d偏心轨道上(e = 0.68),第三个成分为Ac。内、外系统的质量比分别为0.10和0.96。各种He谱线的强度将Aa和Ac归类为晚o型恒星,而Ab在我们的光谱中是不可见的。
Multi-epoch, high-resolution ( R ∼ 50 000) optical spectrosco-py of the O-type (O9 III – IV) star HD 152246 suggests that it is a triple system where a close inner pair (Aa–Ab) with a circular orbit and a period of 6 days is in a 53–d eccentric orbit ( e = 0.68) with a third component Ac. The mass ratios for the inner and outer system are 0.10 and 0.96, respectively. The strengths of various He lines classify Aa and Ac as late O-type stars while Ab is invisible in our spectra.