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Paper: Collimation and Propagation of Jets from Young Stellar Objects
Volume: 510, Stars: From Collapse to Collapse
Page: 44
Authors: Movsessian, T. A.
Abstract: An overview of our investigations of Herbig-Haro jets using the methods of the spectra-imagery is presented. Observations were carried out with 2.6-m telescope of Byurakan Observatory and 6-m telescope of SAO RAS using scanning Fabry-Perot etalons. The new method to measure proper motions of spectoscopically separated structures using two-epoch observations with Fabry-Perot was developed. This method allows to separate inner structures of various physical nature, such as bow-shocks, Mach disks, and deflection shocks. We suppose that characteristic knotty structures in the jets represent internal working surfaces formed by the episodic velocity variations in the flows from young stellar objects. The compact emission structure near the source of FS Tau B flow system was recognised as jet base with wider opening angle by comparison with the jet itself. This scenario was confirmed by spectropolarimetric observations.
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