Molecular Outflows Identified in the FCRAO CO Survey of the Taurus Molecular Cloud

Abstract

The 100 square degree FCRAO CO survey of the Taurus molecular cloud provides an excellent opportunity to undertake an unbiased survey of a large, nearby, molecular cloud complex for molecular outflow activity. Our study provides information on the extent, energetics and frequency of outflows in this region, which are then used to assess the impact of outflows on the parent molecular cloud. The search identified 20 outflows in the Taurus region, 8 of which were previously unknown. Both ${}^{12}$CO and ${}^{13}$CO data cubes from the Taurus molecular map were used, and dynamical properties of the outflows are derived. Even for previously known outflows, our large-scale maps indicate that many of the outflows are much larger than previously suspected, with eight of the flows (40%) being more than a parsec long. The mass, momentum and kinetic energy from the 20 outflows are compared to the repository of turbulent energy in Taurus. Comparing the energy deposition rate from outflows to the dissipation rate of turbulence, we conclude that outflows by themselves cannot sustain the observed turbulence seen in the entire cloud. However, when the impact of outflows is studied in selected regions of Taurus, it is seen that locally, outflows can provide a significant source of turbulence and feedback. Five of the eight newly discovered outflows have no known associated stellar source, indicating that they may be embedded Class 0 sources. In Taurus, 30% of Class I sources and 12% of Flat spectrum sources from the Spitzer YSO catalogue have outflows, while 75% of known Class 0 objects have outflows. Overall, the paucity of outflows in Taurus compared to the embedded population of Class I and Flat Spectrum YSOs indicate that molecular outflows are a short-lived stage marking the youngest phase of protostellar life.

Accepted for publication in MNRAS; 28 pages, 60 figures, 5 tables. For full abstract, see paper

References in corpus (9)

• Theory of Star Formation
• Slow Star Formation in Dense Gas: Evidence and Implications
• The COMPLETE Survey of Star-Forming Regions: Phase I Data
• The relation between gas and dust in the Taurus Molecular Cloud
• Magnetically Aligned Velocity Anisotropy in the Taurus Molecular Cloud
• The Five College Radio Astronomy Observatory CO Mapping Survey of the Taurus Molecular Cloud
• Shells, jets, and internal working surfaces in the molecular outflow from IRAS 04166+2706
• Entrainment Mechanisms for Outflows in the L1551 Star-Forming Region
• Proper Motion Studies of Outflows from Classical T Tauri Stars

Cited by in corpus (35)

• A 0.2 solar mass protostar with a Keplerian disk in the very young L1527 IRS system
• Modeling jet and outflow feedback during star cluster formation
• Chains of dense cores in the Taurus L1495/B213 complex
• CARMA observations of protostellar outflows in NGC 1333
• The CARMA-NRO Orion Survey
• ALMA Observations of the Protostar L1527 IRS: Probing Details of the Disk and the Envelope Structures
• Methanol Maser Associated Outflows: Detection statistics and properties
• Outflows and Bubbles in Taurus: Star-formation Feedback Sufficient to Maintain Turbulence
• Confronting Outflow-Regulated Cluster Formation Model with Observations
• FRagmentation and Evolution of dense cores Judged by ALMA (FREJA). I (Overview). Inner $\sim$1000 au structures of prestellar/protostellar cores in Taurus
• B- and A-Type Stars in the Taurus-Auriga Star Forming Region
• Anatomy of the internal bow shocks in the IRAS 04166+2706 protostellar jet
• The Green Bank Ammonia Survey: A Virial Analysis of Gould Belt Clouds in Data Release 1
• CASI: A Convolutional Neural Network Approach for Shell Identification
• Application of Convolutional Neural Networks to Identify Stellar Feedback Bubbles in CO Emission
• Studies of Turbulence Dissipation in Taurus Molecular Cloud with Core Velocity Dispersion (CVD)
• The Origin of the Rotation Profiles in Star Forming Clouds
• Near-Infrared Imaging Polarimetry toward M17 SWex
• X-ray embedded stars as driving sources of outflow-driven turbulence in OMC1-S
• Ammonia and CO Outflow around 6.7 GHz Methanol Masers
• Searching for Molecular Outflows with Support Vector Machines: Dark Cloud Complex in Cygnus
• An ALMA study of outflow parameters of protoclusters: outflow feedback to maintain the turbulence
• Application of Convolutional Neural Networks to Identify Protostellar Outflows in CO Emission
• A low-velocity bipolar outflow from a deeply embedded object in Taurus revealed by the Atacama Compact Array
• CO Outflow Survey of 68 Very Low Luminosity Objects: a Search for Proto-Brown Dwarf Candidates
• CO Outflow Candidates Toward the W3/4/5 Complex I: The Sample and its Spatial Distribution
• Herschel Key Program, "Dust, Ice, and Gas In Time" (DIGIT): the origin of molecular and atomic emission in low-mass protostars in Taurus
• Molecular Gas Toward the Gemini OB1 Molecular Cloud Complex II: CO Outflow Candidates with Possible WISE Associations
• A Census of Outflow to Magnetic Field Orientations in Nearby Molecular Clouds
• Molecular jets in the DR21/W75N high-mass star-forming region
• A Census of Protostellar Outflows in Nearby Molecular Clouds
• Effects of stellar feedback on cores in STARFORGE
• Orbital parameters and activity of ZZ Tau -- a low mass young binary with circumbinary disc
• Protostellar disc structure and dynamics during star formation from cloud-scale initial conditions
• Numerical Simulation and Completeness Survey of Bubbles in the Taurus and Perseus Molecular Clouds