Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud

Marina Kounkel; Lee Hartmann; Mario Mateo; John I. Bailey; III

doi:10.3847/1538-4357/aa7dea

Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud

Solar and Stellar Astrophysics 2017-08-09 v1 Astrophysics of Galaxies

Authors: Marina Kounkel , Lee Hartmann , Mario Mateo , John I. Bailey , III

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Abstract

We present results from high resolution optical spectra toward 66 young stars in the Orion B molecular cloud to study their kinematics and other properties. Observations of the H $\alpha$ and Li I 6707 {\AA} lines are used to check membership and accretion properties. While the stellar radial velocities of in NGC 2068 and L1622 show good agreement with that of the molecular gas, many of the stars in NGC 2024 show a considerable offset. This could be a signature of either expansion of the cluster, high degree of the ejection of the stars from the cluster through the dynamical interaction, or the acceleration of the gas due to stellar feedback.

Keywords

young stellar objects Orion B molecular cloud stellar kinematics radial velocities accretion stellar feedback cluster dynamics

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@article{arxiv.1707.01115,
  title  = {Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud},
  author = {Marina Kounkel and Lee Hartmann and Mario Mateo and John I. Bailey and III},
  journal= {arXiv preprint arXiv:1707.01115},
  year   = {2017}
}

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Accepted to ApJ; 8 pages, 9 figures

Kinematics of the Optically Visible YSOs Toward the Orion B Molecular Cloud

Abstract

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