Origin and kinematics of the eruptive flow from XZ Tau revealed by ALMA

Abstract

We present high angular resolution ($\sim$0.94$"$) ${}^{12}$CO(1-0) Atacama Large Millimeter/Submillimeter Array (ALMA) observations obtained during the 2014 long baseline campaign from the eruptive bipolar flow from the multiple XZ Tau stellar system discovered by the Hubble Space Telescope (HST). These observations reveal, for the first time, the kinematics of the molecular flow. The kinematics of the different ejections close to XZ Tau reveal a rotating and expanding structure with a southeast-northwest velocity gradient. The youngest eruptive bubbles unveiled in the optical HST images are inside of this molecular expanding structure. Additionally, we report a very compact and collimated bipolar outflow emanating from XZ Tau A, which indicates that the eruptive outflow is indeed originating from this object. The mass (3 $\times$ 10${}^{-7}$ $M_{\odot }$) and energetics (E${}_{kin}$ $=$ 3 $\times$ 10${}^{37}$ ergs) for the collimated outflow are comparable with those found in molecular outflows associated with young brown dwarfs.

Accepted to ApJ Letters

References in corpus (8)

• First Results from High Angular Resolution ALMA Observations Toward the HL Tau Region
• An Overview of the 2014 ALMA Long Baseline Campaign
• A Multi-Epoch HST Study of the Herbig-Haro Flow from XZ Tauri
• Kinematics of the Outflow From The Young Star DG Tau B: Rotation in the vicinities of an optical jet
• Characterization of Molecular Outflows in The Substellar Domain
• Unveiling the nature and interaction of the intermediate/high-mass YSOs in IRAS 20343+4129
• The Launch Region of the SVS 13 Outflow and Jet
• A spider-like outflow in Barnard 5 - IRS 1: The transition from a collimated jet to a wide-angle outflow?

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• A Dwarf Protoplanetary Disk around XZ Tau B
• High-resolution TNG spectra of T Tauri stars: Near-IR GIANO observations of the young variables XZ Tau and DR Tau
• Signs of outflow feedback from a nearby young stellar object on the protostellar envelope around HL Tau
• The Effelsberg survey of FU Orionis and EX Lupi objects I. -- Host environments of FUors/EXors traced by NH${}_3$
• Misaligned Circumstellar Disks and Orbital Motion of the Young Binary XZ Tau
• The Effelsberg survey of FU~Orionis and EX~Lupi objects II. -- H${}_2$O maser observations