Launching the asymmetric bipolar jet of DO Tau

Abstract

The role of bipolar jets in the formation of stars, and in particular how they are launched, is still not well understood. We probe the protostellar jet launching mechanism, via high resolution observations of the near-IR [FeII] 1.53,1.64 micron lines. We consider the bipolar jet from the Classical T Tauri star, DO Tau, & investigate jet morphology & kinematics close to the star, using AO-assisted IFU observations from GEMINI/NIFS. The brighter, blue-shifted jet is collimated quickly after launch. This early collimation requires the presence of magnetic fields. We confirm velocity asymmetries between the two jet lobes, & confirm no time variability in the asymmetry over a 20 year interval. This sustained asymmetry is in accordance with recent simulations of magnetised disk-winds. We examine the data for jet rotation. We report an upper limit on differences in radial velocity of 6.3 & 8.7 km/s for the blue & red-shifted jets, respectively. Interpreting this as an upper limit on jet rotation implies that any steady, axisymmetric magneto-centrifugal model of jet launching is constrained to a launch radius in the disk-plane of 0.5 & 0.3 au for the blue & red-shifted jets, respectively. This supports an X-wind or narrow disk-wind model. This pertains only to the observed high velocity [FeII] emission, & does not rule out a wider flow launched from a wider radius. We report detection of small amplitude jet axis wiggling in both lobes. We rule out orbital motion of the jet source as the cause. Precession can better account for the observations but requires double the precession angle, & a different phase for the counter-jet. Such non-solid body precession could arise from an inclined massive Jupiter companion, or a warping instability induced by launching a magnetic disk-wind. Overall, our observations are consistent with an origin of the DO Tau jets from the inner regions of the disk.

Accepted for publication in A&A - 18 pages, 11 figures (incl. Appendix)

References in corpus (21)

• An Optical Spectroscopic Study of T Tauri Stars. I. Photospheric Properties
• Which jet launching mechanism(s) in TTauri stars?
• Global Simulations of the Inner Regions of Protoplanetary Disks with Comprehensive Disk Microphysics
• Disk-Driven Rotating Bipolar Outflow in Orion Source I
• Tracing Slow Winds from T Tauri Stars via Low Velocity Forbidden Line Emission
• T Tauri Jet Physics Resolved Near The Launching Region with the Hubble Space Telescope
• A survey of C2H, HCN, and C18O in protoplanetary disks
• PdBI sub-arcsecond study of the SiO microjet in HH212 - Origin and collimation of Class 0 jets
• An ALMA survey of DCN/H${}^{13}$CN and DCO${}^{+}$/H${}^{13}$CO${}^{+}$ in protoplanetary disks
• Proper Motions of the Jets in the Region of HH 30 and HL/XZ Tau. Evidence for a Binary Exciting Source of the HH 30 Jet
• Interaction between massive planets on inclined orbits and circumstellar discs
• Global Hydromagnetic Simulations of Protoplanetary Disks with Stellar Irradiation and Simplified Thermochemistry
• Ring formation and dust dynamics in wind-driven protoplanetary discs: global simulations
• Constraining the Sub-AU-Scale Distribution of Hydrogen and Carbon Monoxide Gas around Young Stars with the Keck Interferometer
• Constraining MHD disk winds with ALMA. Apparent rotation signatures and application to HH212
• Investigating the transport of angular momentum from young stellar objects: do H2 jets from Class I YSOs rotate?
• A Search for Consistent Jet and Disk Rotation Signatures in RY Tau
• Multi-epoch Sub-arcsecond [Fe II] Spectroimaging of the DG Tau Outflows with NIFS. I. First data epoch
• Asymmetric MHD Outflows/Jets from Accreting T Tauri Stars
• Sub-0.1" optical imaging of the Z CMa jets with SPHERE/ZIMPOL
• GIARPS High-resolution Observations of T Tauri stars (GHOsT). I. Jet line emission

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• Resolving the collimation zone of an intermediate-mass protostar
• The Morphology of the HD 163296 jet as a window on its planetary system
• A kinematical study of the launching region of the blueshifted HH 46/47 outflow with SINFONI K-band observations
• Investigating the asymmetry of young stellar outflows: Combined MUSE-X-shooter study of the Th 28 jet
• The accretion-ejection connection in the asymmetric Th 28 jet revealed by MUSE-NFM