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On the formation of runaway stars BN and x in the Orion Nebula Cluster

Farias, J. P. ; Tan, J. C.

Astronomy and astrophysics (Berlin), 2018-04, Vol.612, p.L7 [Periódico revisado por pares]

Heidelberg: EDP Sciences

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  • Título:
    On the formation of runaway stars BN and x in the Orion Nebula Cluster
  • Autor: Farias, J. P. ; Tan, J. C.
  • Assuntos: Binary stars ; Clusters ; Ejection ; methods: numerical ; Orion nebula ; Star & galaxy formation ; Star formation ; stars: formation ; stars: kinematics and dynamics
  • É parte de: Astronomy and astrophysics (Berlin), 2018-04, Vol.612, p.L7
  • Notas: istex:E3E9CDB157C406A6A30CA695D23F9C7E1FC51011
    e-mail: juan.farias@chalmers.se
    dkey:10.1051/0004-6361/201732472
    ark:/67375/80W-VKS45J8N-P
    bibcode:2018A%26A...612L...7F
    href:https://www.aanda.org/articles/aa/abs/2018/04/aa32472-17/aa32472-17.html
    publisher-ID:aa32472-17
  • Descrição: 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 of N-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 7 M⊙. The only way to recreate the event is if source I is more massive, that is, ~20 M⊙. 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.
  • Editor: Heidelberg: EDP Sciences
  • Idioma: Inglês
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