The search for the first stars formed from metal-free gas in the universe is one of the key issues in astronomy because it relates to many fields, such as the formation of stars and galaxies, the evolution of the universe, and the origin of elements. It is not still clear if metal-free first stars can be found in the present universe. These first stars are thought to exist among extremely metal-poor stars in the halo of our Galaxy. Here we propose a new scenario for the formation of low-mass first stars that have survived until today and observational counterparts in our Galaxy. The first stars in binary systems, consisting of massive- and low-mass stars, are examined using stellar evolution models, simulations of supernova ejecta colliding with low-mass companions, and comparisons with observed data. These first star survivors will be observed as metal-rich halo stars in our Galaxy. We may have identified a candidate star in the observational database where elemental abundances and kinematic data are available. Our models also account for the existence in the literature of several solar-metallicity stars that have space velocities equivalent to the halo population. The proposed scenario demands a new channel of star formation in the early universe and is a supplementary scenario for the origin of the known metal-poor stars.

中文翻译：

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第一批恒星幸存者是在双星系统中经历过超新星爆炸的富含金属的晕星

寻找宇宙中第一批由无金属气体形成的恒星是天文学的关键问题之一，因为它涉及恒星和星系的形成、宇宙演化、元素起源等诸多领域。 . 目前尚不清楚在目前的宇宙中是否可以找到不含金属的第一颗恒星。这些第一颗恒星被认为存在于我们银河系光晕中金属含量极低的恒星中。在这里，我们提出了一个新的情景，用于形成一直存活到今天的低质量第一颗恒星以及我们银河系中的观测对应物。双星系统中的第一颗恒星由大质量和低质量恒星组成，使用恒星演化模型、超新星喷射物与低质量伴星碰撞的模拟以及与观测数据的比较来检查。这些第一批恒星幸存者将作为我们银河系中富含金属的晕星被观察到。我们可能已经在元素丰度和运动学数据可用的观测数据库中确定了一颗候选恒星。我们的模型还解释了文献中存在的几颗太阳金属度恒星，它们的空间速度与光晕数量相当。所提出的情景需要在早期宇宙中建立一个新的恒星形成通道，并且是对已知贫金属恒星起源的补充情景。