NIR photometry of early-type stars in Cyg OB2
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Cygnus OB2 is one of the richest OB associations in the local Galaxy, and is located in a vast complex containing several other associations, clusters, molecular clouds, and HII...
天鹅座OB2星协（Cygnus OB2）是银河系局部区域中最为丰富的OB星协之一，它坐落于一个包含多个其他星协、星团、分子云以及电离氢区（H II区）的巨型天体复合体之中……
