Molecular outflows around high-mass young stellar objects

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dc.creatorXu, Y.
dc.creatorShen, Z. -Q.
dc.creatorYang, J.
dc.creatorZheng, X. W.
dc.creatorMiyazaki, A.
dc.creatorSunada, K.
dc.creatorMa, H. J.
dc.creatorLi, J. J.
dc.creatorSun, J. X.
dc.creatorPei, C. C.
dc.date2006-04-24
dc.date.accessioned2026-07-07T11:25:32Z
dc.date.available2026-07-07T11:25:32Z
dc.descriptionWe present a study of molecular outflows using high-resolution mapping of the CO (1-0) line emission toward eight relatively nearby 6.7 GHz methanol masers, which are associated with massive star forming regions. Outflows were detected in seven out of eight sources, and five of them clearly show bipolar or multiple outflow morphologies. These outflows have typical masses of a few solar masses, momenta of tens of $M_{\odot}$ km s$^{-1}$, kinetic energies of $\sim$ 10$^{45}$ ergs, and the mass entrainment rate of a few $10^{-5} M_{\odot}$ yr$^{-1}$. They have significantly more mass and kinetic energy than their low-mass counterparts. In some of the sources, the massive outflow is obviously associated with a particular massive star in the cluster, while in others the origin remains uncertain. The high detection rate of outflows toward methanol masers suggests that the outflow phase of massive protostars encompasses the methanol maser phase.
dc.description16 pages, 3 figures, To appear in AJ (July 2006)
dc.identifierhttps://arxiv.org/abs/astro-ph/0604494
dc.identifierhttp://arxiv.org/abs/astro-ph/0604494
dc.identifierAstron.J.132:20-26,2006
dc.identifierdoi:10.1086/504466
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/195535
dc.subjectAstrophysics
dc.titleMolecular outflows around high-mass young stellar objects
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