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arXiv 0802.3350astro-ph
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天鹅座OB2星协中新的大质量双星

New Massive Binaries in the Cygnus OB2 Association

Daniel C. Kiminki, M. Virgina McSwain, Henry A. Kobulnicky

摘要:

作为正在进行的确定天鹅座OB 2星协大质量双星轨道参数分布研究的一部分,我们给出了两个新的单线分光双星MT 059(O 8V)和MT 258(O 8V)以及一个双线食双星Schulte 3的轨道解。我们还约束了另外三个双线系统(MT 252,MT 720,MT 771)的轨道根数。所有系统的周期范围为1.5-19天,偏心率范围为0-0.11。这六个新的OB双星系统使天鹅座OB 2核心区域内的多个系统总数达到11个。目前的样本没有显示出“双重”二元分布的证据。

英文摘要:

As part of an ongoing study to determine the distribution of orbital parameters for massive binaries in the Cygnus OB2 Association, we present the orbital solutions for two new single-lined spectroscopic binaries, MT059 (O8V) & MT258 (O8V), and one double-lined eclipsing binary (Schulte 3). We also constrain the orbital elements of three additional double-lined systems (MT252, MT720, MT771). Periods for all systems range from 1.5-19 days and eccentricities range from 0-0.11. The six new OB binary systems bring the total number of multiple systems within the core region of Cyg OB2 to 11. The current sample does not show evidence for a ``twin-heavy'' binary distribution.

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