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Paper: Some Results of Scanning Fabry-Perot Observations of the Jets from Young Stellar Objects
Volume: 511, Non-Stable Universe: Energetic Resources, Activity Phenomena and Evolutionary Processes
Page: 64
Authors: Movsessian, T. A.; Magakian, T. Yu.
Abstract: In this paper we summarise main results of our investigations of Herbig-Haro objects and jets from young stellar objects using scanning Fabry-Perot etalon. This method allows to separate structures of various kinematical characteristics in theses objects. Our investigations focus on the separation and study of a different type inner structures in Herbig-Haro jets as bow-shocks, Mach disks and deflection shocks. To collate radial velocity and proper motion data, the new method of measuring the proper motions of spectrally separated structures using two epoch observations with Fabry-Perot was developed. This method allows to confirm presence of internal working surfaces in the collimated jets. We suppose that characteristic knotty structures in the jets result of episodic velocity variations in the flows, which form internal working surfaces in the flow. Observations were started at 2.6 m telescope of Byurakan Observatory and after were continued at 6 m telescope of SAO RAS. On the other hand, the compact emission structure near the source of FS Tau B flow system was recognised as the jet base with wider opening angle by comparison with the jet itself. This scenario was confirmed by spectra-polarimetric observations performed at 6m telescope.
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