TY - JOUR T1 - Constraints on massive star formation: Cygnus OB2 was always an association JO - Monthly Notices of the Royal Astronomical Society UR - http://eprints.whiterose.ac.uk/120299/ PY - 2014/02/11 AU - Wright NJ AU - Parker RJ AU - Goodwin SP AU - Drake JJ ED - DO - DOI: 10.1093/mnras/stt2232 PB - Oxford 小欧视频 Press (OUP) VL - 438 IS - 1 SP - 639 EP - 646 Y2 - 2025/04/10 ER -