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Binary outflows from young stars: interaction of co-orbital jet and wind

Lynch, Chris J.R., Smith, Michael D., Glover, Simon C.O. (2020) Binary outflows from young stars: interaction of co-orbital jet and wind. Monthly Notices of the Royal Astronomical Society, 491 (3). pp. 3082-3100. ISSN 0035-8711. E-ISSN 1365-2966. (doi:10.1093/mnras/stz2985) (KAR id:80269)

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Jets from young stellar objects provide insight into the workings of the beating heart at the centre of star-forming cores. In some cases, multiple pulsed outflows are detected such as the atomic and molecular jets from a proposed binary system in the T Tauri star HH 30. We investigate here the development and propagation of duelling atomic and molecular outflows stemming from the two stars in co-orbit. We perform a series of numerical experiments with the ZEUS-MP code with enhanced cooling and chemistry modules. The aim of this work is to identify signatures on scales of the order of 100 au. The jet sources are off the grid domain and so it is the propagation and interaction from ∼20 au out to 100 au simulated here. We find that the molecular flow from the orbiting source significantly disturbs the atomic jet, deflecting and twisting the jet and disrupting the jet knots. Regions of high ionization are generated as the atomic jet rams through the dense molecular outflow. Synthetic images in atomic and molecular lines are presented, which demonstrate identifying signatures. In particular, the structure within the atomic jet is lost and H α may trace the walls of the present CO cavity or where the walls have been recently. These results provide a framework for the interpretation of upcoming high-resolution observations.

Item Type: Article
DOI/Identification number: 10.1093/mnras/stz2985
Uncontrolled keywords: hydrodynamics, stars: formation, stars: pre-main-sequence, ISM: jets and outflows
Divisions: Divisions > Division of Natural Sciences > School of Physical Sciences
Depositing User: Michael Smith
Date Deposited: 26 Feb 2020 16:29 UTC
Last Modified: 09 Jun 2021 03:13 UTC
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