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  • 标题:On the formation of runaway stars BN and x in the Orion Nebula Cluster
  • 本地全文:下载
  • 作者:J. P. Farias ; J. C. Tan
  • 期刊名称:Astronomy & Astrophysics
  • 印刷版ISSN:0004-6361
  • 电子版ISSN:1432-0746
  • 出版年度:2018
  • 卷号:612
  • DOI:10.1051/0004-6361/201732472
  • 语种:English
  • 出版社:EDP Sciences
  • 摘要:We explore scenarios for the dynamical ejection of stars BN and x from source I in the Kleinmann-Low nebula of the Orion Nebula Cluster (ONC), which is important because it is the closest region of massive star formation. This ejection would cause source I to become a close binary or a merger product of two stars. We thus consider binary-binary encounters as the mechanism to produce this event. By running a large suite ofN-body simulations, we find that it is nearly impossible to match the observations when using the commonly adopted masses for the participants, especially a source I mass of 7M⊙. The only way to recreate the event is if source I is more massive, that is, ~20M⊙. However, even in this case, the likelihood of reproducing the observed system is low. We discuss the implications of these results for understanding this important star-forming region.
  • 关键词:Key wordsenmethods: numericalstars: formationstars: kinematics and dynamics
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