Accretion Flows or Outflow Cavities? Uncovering the Gas Dynamics around Lupus 3-MMS

Abstract

Understanding how material accretes onto the rotationally supported disk from the surrounding envelope of gas and dust in the youngest protostellar systems is important for describing how disks are formed. Magnetohydrodynamic simulations of magnetized, turbulent disk formation usually show spiral-like streams of material (accretion flows) connecting the envelope to the disk. However, accretion flows in these early stages of protostellar formation still remain poorly characterized due to their low intensity and possibly some extended structures are disregarded as being part of the outflow cavity. We use ALMA archival data of a young Class 0 protostar, Lupus 3-MMS, to uncover four extended accretion flow-like structures in C${}^{18}$O that follow the edges of the outflows. We make various types of position-velocity cuts to compare with the outflows and find the extended structures are not consistent with the outflow emission, but rather more consistent with a simple infall model. We then use a dendrogram algorithm to isolate five sub-structures in position-position-velocity space. Four out of the five sub-structures fit well ($>$95%) with our simple infall model, with specific angular momenta between $2.7-6.9\times 10^{-4}$kms${}^{-1}$pc and mass-infall rates of $0.5-1.1\times 10^{-6}{M}_{\odot }$yr${}^{-1}$. Better characterization of the physical structure in the supposed "outflow-cavities" is important to disentangle the true outflow cavities and accretion flows.

23 pages, 12 figures, accepted for publication in The Astrophysical Journal

References in corpus (21)

• The NumPy array: a structure for efficient numerical computation
• Cold Dark Clouds: The Initial Conditions for Star Formation
• Structural Analysis of Molecular Clouds: Dendrograms
• Magnetic processes in a collapsing dense core. I Accretion and Ejection
• Magnetic Braking and Protostellar Disk Formation: The Ideal MHD Limit
• Formation of a Keplerian disk in the infalling envelope around L1527 IRS: transformation from infalling motions to Kepler motions
• A protostellar system fed by a streamer of 10,500 au length
• Signs of Early-Stage Disk Growth Revealed with ALMA
• ALMA Observations of Infalling Flows toward the Keplerian Disk around the Class I Protostar L1489 IRS
• The ALMA view of the protostellar system HH212 - The wind, the cavity, and the disk
• ALMA Results of the Pseudodisk, Rotating disk, and Jet in Continuum and HCO+ in the Protostellar System HH 212
• SMA observations of young disks: separating envelope, disk, and stellar masses in class I YSOs
• Observations of Infalling and Rotational Motions on a 1,000-AU Scale around 17 Class 0 and 0/I Protostars: Hints of Disk Growth and Magnetic Braking?
• ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures
• Accretion and magnetic field morphology around Class 0 stage protostellar discs
• On the Role of Pseudodisk Warping and Reconnection in Protostellar Disk Formation in Turbulent Magnetized Cores
• Non-ideal magnetohydrodynamics vs turbulence I: Which is the dominant process in protostellar disc formation?
• Ionization: a possible explanation for the difference of mean disk sizes in star-forming regions
• 1000 AU Exterior Arcs Connected to the Protoplanetary Disk around HL Tau
• Outflows, envelopes, and disks as evolutionary indicators in Lupus YSOs
• Protoplanetary disk formation from the collapse of a prestellar core

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• Resolved Gas Temperatures and 12C/13C ratios in SVS13A from ALMA Observations of CH3CN and CH3-13-CN
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• Synthetic Observations of the Infalling Rotating Envelope: Links between the Physical Structure and Observational Features
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• Anatomy of the Class I protostar L1489 IRS with NOEMA - II. A disk replenished by a massive streamer
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• Early Planet Formation in Embedded Disks (eDisk). XX. Constraining the Chemical Tracers of Young Protostellar Sources
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• A VLA View of the Flared, Asymmetric Disk Around the Class 0 Protostar L1527 IRS
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