论文标题
银河系围绕早期型矮星系的化学和恒星特性
Chemical and stellar properties of early-type dwarf galaxies around the Milky Way
论文作者
论文摘要
早期型矮人（ETD）是低质量星系进化的终点，其气体供应已被熄灭。恒星形成的停止揭示了古老的恒星种群。大量信息存储在银河系周围的矮球体和超生产星系的颜色，幅度，金属性和大量的恒星中，从而可以详细研究其化学和恒星种群。在这里，我们总结了当前的理解，这在过去十年中迅速发展，这要归功于大规模的天文学，光度法和光谱调查。我们强调，ETD中的原始恒星种群提供了一个独特的实验室，可以研究Z = 2以上时期的小尺度上的物理条件。我们强调了在附近矮人中观察到的恒星形成和化学富集历史的多样性。这些数据尚无法完全解密，以揭示矮化演变中的关键过程，但是已经成功尝试固定沉重元素生产的地点。
Early-type dwarfs (ETDs) are the end points of the evolution of low-mass galaxies whose gas supply has been extinguished. The cessation of star-formation lays bare the ancient stellar populations. A wealth of information is stored in the colours, magnitudes, metallicities and abundances of resolved stars of the dwarf spheroidal and ultra-faint galaxies around the Milky Way, allowing their chemistry and stellar populations to be studied in great detail. Here, we summarize our current understanding, which has advanced rapidly over the last decade thanks to the flourishing of large-scale astrometric, photometric and spectroscopic surveys. We emphasise that the primeval stellar populations in the ETDs provide a unique laboratory to study the physical conditions on small scales at epochs beyond z=2. We highlight the observed diversity of star-formation and chemical enrichment histories in nearby dwarfs. These data can not yet be fully deciphered to reveal the key processes in the dwarf evolution but the first successful attempts have been made to pin down the sites of heavy element production.
