Rotation of the NGC 1333 IRAS 4A2 Protostellar Jet
arXiv:1101.4982 · doi:10.1088/2041-8205/728/2/L34
Abstract
The bipolar jet of the NGC 1333 IRAS 4A2 protostar shows a velocity gradient in the direction perpendicular to the jet axis. This lateral velocity gradient can be seen throughout the jet imaged in a silicon monoxide line, 2500-8700 AU from the driving source, and is consistent with the rotation of the accretion disk. If this gradient is caused by the rotation of the jet around its axis, the average specific angular momentum is about 1.5 x 10^21 cm^2 s^-1. Comparison of the kinematics between the jet and the disk suggests that the jet-launching region on the disk has a radius of about 2 AU, which supports the disk-wind models. The angular momentum transported away by the jet seems to be large enough for the protostar to accrete matter from the disk, confirming the crucial role of jets in the early phase of star formation process.
To appear in the Astrophysical Journal
References in corpus (7)
- Rotating molecular outflows: the young T Tauri star in CB26
- Submillimeter arcsecond-resolution mapping of the highly collimated protostellar jet HH 211
- Kinematics of the Ammonia Disk around the Protostar NGC 1333 IRAS 4A2
- Investigating the transport of angular momentum from young stellar objects: do H2 jets from Class I YSOs rotate?
- Variability of the NGC 1333 IRAS 4A Outflow: Molecular Hydrogen and Silicon Monoxide Images
- Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System
- Numerical Simulations of a Protostellar Outflow Colliding with a Dense Molecular Cloud
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