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Blue metal-poor stars (BMPs) are main sequence stars that appear bluer and more luminous than normal turnoff stars. They were originally singled out by using B-V and U-B colour...蓝贫金属星（Blue metal-poor stars, BMPs）是一类外观较普通主序拐点星更蓝且光度更高的主序星。该类天体最初通过B-V与U-B色指数被筛选出来。