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arXiv 0908.3694astro-ph.SR
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多星星族合成

Towards Multiple-Star Population Synthesis

P. P. Eggleton

摘要:

Eggleton & Tokovinin最近收集了4559颗依巴谷星等大于6.0的恒星的多重性和其他一些性质(4558颗不包括太阳)。在本文中,我给出了一个数值配方,通过蒙特卡罗技术,一个理论上的合奏多个恒星,类似于观察到的样本。只允许最多8的多重性;观察集只包含最多7的多重性。此外,配方建议处理选择效应和观测的不确定性,出席确定的多重性。这些配方意味着,例如,为了达到观察到的平均多重数1.53,有必要假设真实总体的平均多重数略高于2.0。这个数值模型可能是有用的:(a)与恒星和恒星团簇形成理论的结果进行比较,(b)人口合成,不忽略2以上的多重性,和(c)初始条件的动态集群模拟。

英文摘要:

The multiplicities of stars, and some other properties, were collected recently by Eggleton & Tokovinin, for the set of 4559 stars with Hipparcos magnitude brighter than 6.0 (4558 excluding the Sun). In this paper I give a numerical recipe for constructing, by a Monte Carlo technique, a theoretical ensemble of multiple stars that resembles the observed sample. Only multiplicities up to 8 are allowed; the observed set contains only multiplicities up to 7. In addition, recipes are suggested for dealing with the selection effects and observational uncertainties that attend the determination of multiplicity. These recipes imply, for example, that to achieve the observed average multiplicity of 1.53, it would be necessary to suppose that the real population has an average multiplicity slightly over 2.0. This numerical model may be useful for (a) comparison with the results of star and star cluster formation theory, (b) population synthesis that does not ignore multiplicity above 2, and (c) initial conditions for dynamical cluster simulations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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