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

Journal Article · Tue Aug 01 00:00:00 EDT 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/AA7DEA· OSTI ID:22663312

Kounkel, Marina; Hartmann, Lee; Mateo, Mario ^[1]; Bailey, III, John I. ^[2]

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1. Department of Astronomy, University of Michigan, 1085 S. University Street, Ann Arbor, MI 48109 (United States)
2. Leiden Observatory, Leiden University, P.O. Box 9513, 2300-RA Leiden (Netherlands)

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 α and Li i 6707 Å lines are used to check membership and accretion properties. While the stellar radial velocities of NGC 2068 and L1622 are in 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 the expansion of the cluster, the high degree of the ejection of the stars from the cluster through dynamical interaction, or the acceleration of the gas due to stellar feedback.

• OSTI ID: 22663312
• Journal Information: Astrophysical Journal, Vol. 844, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCELERATION
CLOUDS
COSMIC GASES
EXPANSION
FEEDBACK
GALAXIES
INTERACTIONS
MOLECULES
RADIAL VELOCITY
RESOLUTION
SPECTRA
STARS