High Resolution Imaging of Molecular Outflows in Massive Young Stars
| dc.creator | Qiu, Keping | |
| dc.creator | Zhang, Qizhou | |
| dc.creator | Beuther, Henrik | |
| dc.creator | Yang, Ji | |
| dc.date | 2006-09-11 | |
| dc.date.accessioned | 2026-07-07T10:40:07Z | |
| dc.date.available | 2026-07-07T10:40:07Z | |
| dc.description | We present high angular resolution observations toward two massive star forming regions IRAS 18264-1152 and IRAS 23151+5912 with the Plateau de Bure Interferometer (PdBI) in the SiO (J=2-1) and H$^{13}$CO$^{+}$ (J=1-0) lines and at 1.3 mm and 3.4 mm continuum, and with the Very Large Array (VLA) in the NH$_3$ (J,K)=(1,1), (2,2) lines. The NH$_3$ (1,1) and (2,2) emission is detected toward IRAS 18264-1152 only. For IRAS 18264-1152, the SiO observations reveal at least two quasi-perpendicular outflows with high collimation factors, and the most dominant feature is a redshifted jet-like outflow with very high velocities up to about $Δv=60$ kms$^{-1}$ with respect to the systemic velocity. The very-high-velocity component ($Δv=22 - 60$ kms$^{-1}$) of this outflow is spatially offset from its high-velocity ($Δv=3 - 21$ kms$^{-1}$) component. The SiO line profiles and position-velocity characteristics of these two components suggest that this outflow can be driven by an underlying precessing jet. For IRAS 23151+5912, the bipolar but mainly blueshifted SiO outflow coincides with the inner parts of the single-dish CO outflow. In particular the quasi-parabolic shape of the blueshifted outflow coincides with the near-infrared nebulosity and is consistent with entrainment of the gas by an underlying wide-angle wind. The analysis of the molecular outflow data of the two luminous sources further support high-mass stars forming via a disk-mediated accretion process similar to low-mass stars. | |
| dc.description | Accepter for publication in The Astrophysical Journal | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0609285 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0609285 | |
| dc.identifier | Astrophys.J.654:361-372,2006 | |
| dc.identifier | doi:10.1086/509069 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/181249 | |
| dc.subject | Astrophysics | |
| dc.title | High Resolution Imaging of Molecular Outflows in Massive Young Stars | |
| dc.type | text |