The ALMA Early Science View of FUor/EXor objects. IV. Misaligned Outflows in the Complex Star-forming Environment of V1647 Ori and McNeil's Nebula

Abstract

We present Atacama Large Millimeter/sub-millimeter Array (ALMA) observations of the star-forming environment surrounding V1647 Ori, an outbursting FUor/EXor pre-MS star. Dust continuum and the (J = 2 - 1) ${}^{12}$CO, ${}^{13}$CO, C${}^{18}$O molecular emission lines were observed to characterize the V1647 Ori circumstellar disc and any large scale molecular features present. We detect continuum emission from the circumstellar disc and determine a radius r = 40 au, inclination i = 17${}^{\circ }$${}_{-9}^{+6}$ and total disc mass of M${}_{\mathrm{disk}}$ of ~0.1 M${}_{\odot }$. We do not identify any disc structures associated with nearby companions, massive planets or fragmentation. The molecular cloud environment surrounding V1647 Ori is both structured and complex. We confirm the presence of an excavated cavity north of V1647 Ori and have identified dense material at the base of the optical reflection nebula (McNeil's Nebula) that is actively shaping its surrounding environment. Two distinct outflows have been detected with dynamical ages of ~11,700 and 17,200 years. These outflows are misaligned suggesting disc precession over ~5500 years as a result of anisotropic accretion events is responsible. The collimated outflows exhibit velocities of ~2 km s${}^{-1}$, similar in velocity to that of other FUor objects presented in this series but significantly slower than previous observations and model predictions. The V1647 Ori system is seemingly connected by an "arm" of material to a large unresolved structure located ~20$"$ to the west. The complex environment surrounding V1647 Ori suggests it is in the early stages of star formation which may relate to its classification as both an FUor and EXor type object.

arXiv comment18 pages, 14 figures, 4 tables; accepted for publication in MNRAS

References in corpus (39)

• The Spitzer c2d Legacy Results: Star Formation Rates and Efficiencies; Evolution and Lifetimes
• Protoplanetary Disks and Their Evolution
• Circumstellar Dust Disks in Taurus-Auriga: The Submillimeter Perspective
• The distance to the Orion Nebula
• Planet formation around stars of various masses: The snow line and the frequency of giant planets
• Rapid Coagulation of Porous Dust Aggregates Outside the Snow Line: A Pathway to Successful Icy Planetesimal Formation
• Episodic accretion in magnetically layered protoplanetary discs
• The Evolution of Outflow-Envelope Interactions in Low-Mass Protostars
• The Origin of Episodic Accretion Bursts in the Early Stages of Star Formation
• Imaging the water-snow line during a protostellar outburst
• On the tilting of protostellar disks by resonant tidal effects
• Resolved images of a protostellar outflow launched by an extended disk wind
• Massive planets in FU Orionis discs: implications for thermal instability models
• Irradiated Herbig-Haro Jets in the Orion Nebula and Near NGC 1333
• Precession of collimated outflows from young stellar objects
• The Turbulent Origin of Outflow and Spin Misalignment in Multiple Star Systems
• CO gas inside the protoplanetary disk cavity in HD 142527: disk structure from ALMA
• IRAS 05436-0007 and the Emergence of McNeil's Nebula
• Mc Neil's Nebula in Orion: The Outburst History
• An X-ray Outburst from the Rapidly Accreting Young Star That Illuminates McNeil's Nebula
• A Pulsed, Precessing Jet in Cepheus A
• The Outburst of V1647 Ori Revealed by Spitzer
• Outflows from the high-mass protostars NGC 7538 IRS1/2 observed with bispectrum speckle interferometry -- Signatures of flow precession
• Binary system and jet precession and expansion in G35.20-0.74N
• The 2008 Outburst in the Young Stellar System Z CMa: The First Detection of Twin Jets
• Mid-Infrared and Submillimeter Observations of the Illuminating Source of McNeil's Variable Nebula
• V1647 Orionis: Reinvigorated Accretion and the Re-Appearance of McNeil's Nebula
• V1647 Orionis: One Year into Quiescence
• The ALMA Early Science view of FUor/EXor objects. I. Through the looking-glass of V2775 Ori
• The ALMA Early Science View of FUor/EXor objects. II. The Very Wide Outflow Driven by HBC 494
• Radiation induced warping of protostellar accretion disks
• The Early ALMA View of the FU Ori Outburst System
• The ALMA Early Science View of FUor/EXor objects. III. The Slow and Wide Outflow of V883 Ori
• First AU-scale observations of V1647 Ori with VLTI/MIDI
• X-raying the Beating Heart of a Newborn Star: Rotational Modulation of High-energy Radiation from V1647 Ori
• Sub-0.1" optical imaging of the Z CMa jets with SPHERE/ZIMPOL
• Re-appearance of McNeil's nebula (V1647 Orionis) and its outburst environment
• X-ray Production by V1647 Ori During Optical Outbursts
• Star Formation in Orion's L1630 Cloud: an Infrared and Multi-epoch X-ray Study

Cited by in corpus (19)

• ALMA Survey of Lupus Protoplanetary Disks II: Gas Disk Radii
• A Near-IR Spectroscopic Survey of FU Orionis Objects
• Flybys in protoplanetary discs: II. Observational signatures
• The ALMA early science view of FUor/EXor objects - V: continuum disc masses and sizes
• Resolving the FU Ori System with ALMA: Interacting Twin Disks?
• The extraordinary outburst in the massive protostellar system NGC6334I-MM1: Flaring of the water masers in a north-south bipolar outflow driven by MM1B
• V346 Nor: the post-outburst life of a peculiar young eruptive star
• Close stellar flybys common in low-mass clusters
• The Circumstellar Disk and Asymmetric outflow of the EX Lup Outburst System
• Molecular Mapping of DR Tau's Protoplanetary Disk, Envelope, Outflow, and Large-Scale Spiral Arm
• Expanding CO Shells in the Orion A Molecular Cloud
• ALMA Observations of Young Eruptive Stars: continuum disk sizes and molecular outflows
• EXORCISM: a spectroscopic survey of young eruptive variables (EXor and candidates)
• SiO Outflows as Tracers of Massive Star Formation in Infrared Dark Clouds
• A Chemical Map of the Outbursting V883 Ori system: Vertical and Radial Structures
• An APEX study of molecular outflows in FUor-type stars
• The Effelsberg survey of FU Orionis and EX Lupi objects I. -- Host environments of FUors/EXors traced by NH${}_3$
• The Effelsberg survey of FU~Orionis and EX~Lupi objects II. -- H${}_2$O maser observations
• Evidence of Accretion Burst: The Viscously Heated Inner Disk of the Embedded Protostar IRAS 16316-1540