双星配对机制
Pairing mechanisms for binary stars
摘要：
恒星群中双星的数量提供了关于不同环境下恒星形成过程的重要信息。双星性也是恒星星族研究中的一个关键因素，是校准双星演化通道的先决条件。在这些程序中，我们提出了几个常用的方法来配对成双星系统，我们称之为配对函数的概述。许多配对函数经常被观测者和计算天文学家使用，或者是为了数学上的方便，或者是因为它们粗略地描述了恒星形成过程的预期结果。我们讨论的后果，每个配对函数的解释观测和数值模拟。二元分数和质量比分布通常强烈依赖于样品中主要光谱类型范围的选择。这些数量，当来自一个双星调查与质量有限的样本的目标恒星，因此不代表人口作为一个整体。
英文摘要：
Knowledge of the binary population in stellar groupings provides important information about the outcome of the star forming process in different environments. Binarity is also a key ingredient in stellar population studies and is a prerequisite to calibrate the binary evolution channels. In these proceedings we present an overview of several commonly used methods to pair individual stars into binary systems, which we refer to as the pairing function. Many pairing functions are frequently used by observers and computational astronomers, either for the mathematical convenience, or because they roughly describe the expected outcome of the star forming process. We discuss the consequences of each pairing function for the interpretation of observations and numerical simulations. The binary fraction and mass ratio distribution generally depend strongly on the selection of the range in primary spectral type in a sample. These quantities, when derived from a binary survey with a mass-limited sample of target stars, are thus not representative for the population as a whole.
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