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arXiv 1012.4301astro-ph.SRastro-ph.GA
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疏散星团中的第一、第二和第三大质量星

First, Second and Third Massive Stars in Open Clusters

Alexey Mints

摘要:

本文的目的是研究利用疏散星团中的第一、第二和第三大质量恒星估算星团总质量和成员的可能性。利用数值模拟和解析近似方法建立了估计函数,并研究了所得到的估计函数的精度和误差分布。我们发现,第一,第二和第三大质量恒星的质量分布在高质量端显示出强烈的幂律尾,因此,最好使用中值或众数而不是平均值。我们表明,第三个大质量的恒星是一个更好的估计,然后第一,因为它是更精确,更少的参数,如最大允许恒星质量的依赖。

英文摘要:

The goal of this paper is to study possibilities of using first, second and third massive stars in open clusters to estimate total cluster mass and membership. We built estimator functions with the use of numerical simulations and analytical approximations and studied the precision and error distribution of the obtained estimator functions. We found that the distribution of the mass of first, second and third massive stars shows strong power-law tails at the high-mass end, thus it is better to use median or mode values instead of average ones. We show that the third massive star is a much better estimator then the first as it is more precise and less dependent on parameters such as maximum allowed stellar mass.

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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