Probing the role of protostellar feedback in clustered star formation. Mapping outflows in the collapsing protocluster NGC 2264-C

Abstract

The role played by protostellar feedback in clustered star formation is still a matter of debate. In particular, protostellar outflows have been proposed as a source of turbulence in cluster-forming clumps, which may provide support against global collapse for several free-fall times. Here, we seek to test the above hypothesis in the case of the well-documented NGC 2264-C protocluster, byquantifying the amount of turbulence and support injected in the surrounding medium by protostellar outflows. Using the HERA heterodyne array on the IRAM 30m telescope, we carried out an extensive mapping of NGC 2264-C in the three molecular line transitions 12CO(2-1), 13CO(2-1), and C18O(2-1). We found widespread high-velocity 12CO emission, testifying to the presence of eleven outflow lobes, closely linked to the compact millimeter continuum sources previously detected in the protocluster. We carried out a detailed analysis of the dynamical parameters of these outflows, including a quantitative evaluation of the overall momentum flux injected in the cluster-forming clump. These dynamical parameters were compared to the gravitational and turbulent properties of the clump. We show that the population of protostellar outflows identified in NGC 2264-C are likely to contribute a significant fraction of the observed turbulence but cannot efficiently support the protocluster against global collapse. Gravity appears to largely dominate the dynamics of the NGC 2264-C clump at the present time. It is however possible that an increase in the star formation rate during the further evolution of the protocluster will trigger sufficient outflows to finally halt the contraction of the cloud.

arXiv commentAccepted for publication in Astronomy & Astrophysics. The quality of figures has been deteriorated to match arXiv size limitation

References in corpus (31)

• On the variation of the Initial Mass Function
• Embedded Clusters in Molecular Clouds
• The Stellar IMF from Turbulent Fragmentation
• Interpreting Spectral Energy Distributions from Young Stellar Objects. II. Fitting observed SEDs using a large grid of pre-computed models
• The Formation of a Star Cluster: Predicting the Properties of Stars and Brown Dwarfs
• Slow Star Formation in Dense Gas: Evidence and Implications
• Analytical theory for the initial mass function: CO clumps and prestellar cores
• The Energy Dissipation Rate of Supersonic, Magnetohydrodynamic Turbulence in Molecular Clouds
• Kinetic Energy Decay Rates of Supersonic and Super-Alfvenic Turbulence in Star-Forming Clouds
• Efficiencies of Low-Mass Star and Star Cluster Formation
• Star formation in clusters: a survey of compact mm-wave sources in the Serpens core
• 2MASS Observations of the Perseus, Orion A, Orion B, and Monoceros R2 Molecular Clouds
• Constraints on the Stellar/Sub-stellar Mass Function in the Inner Orion Nebula Cluster
• A Theory of the IMF for Star Formation in Molecular Clouds
• Protostellar Turbulence Driven by Collimated Outflows
• Accretion in stellar clusters and the IMF
• A SCUBA survey of the NGC 2068/2071 protoclusters
• Modes of Multiple Star Formation
• Probing the formation of intermediate- to high-mass stars in protoclusters: A detailed millimeter study of the NGC 2264 clumps
• An unbiased search for the signatures of protostars in the rho Ophiuchi Molecular Cloud. II. Millimetre continuum observations
• Star Cluster Evolution, Dynamical Age Estimation and the Kinematical Signature of Star Formation
• The Episodic, Precessing Giant Molecular Outflow from IRAS 04239+2436 (HH 300)
• Protostellar outflow-driven turbulence
• Turbulence driven by outflow-blown cavities in the molecular cloud of NGC 1333
• Probing the formation of intermediate- to high-mass stars in protoclusters II. Comparison between millimeter interferometric observations of NGC 2264-C and SPH simulations of a collapsing clump
• Can Protostellar Jets Drive Supersonic Turbulence in Molecular Clouds?
• First 450-micron dust continuum mapping of the massive star-forming region NGC 3576 with the P-ArTeMiS bolometer camera
• Entrainment Mechanisms for Outflows in the L1551 Star-Forming Region
• Gas flows around 2 young stellar clusters in NGC2264
• Outflow Driven Cavities: Numerical Simulations of Intermediaries of Protostellar Turbulence
• NGC 2264 IRS1: The central engine and its cavity

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• A distance limited sample of massive molecular outflows
• Molecular Outflows Driven by Low-Mass Protostars. I. Correcting for Underestimates When Measuring Outflow Masses and Dynamical Properties
• Simultaneous low- and high-mass star formation in a massive protocluster: ALMA observations of G11.92-0.61
• Molecular Outflows From the Protocluster, Serpens South
• The Molecular Outflows in the rho Ophiuchi Main Cloud: Implications For Turbulence Generation
• Simulating radiative feedback and star cluster formation in GMCs: I. Dependence on gravitational boundedness
• Confronting Outflow-Regulated Cluster Formation Model with Observations
• Near-Infrared Imaging Polarimetry of the Serpens Cloud Core: Magnetic Field Structure, Outflows, and Inflows in A Cluster Forming Clump
• Simulating the UV Escape Fractions from Molecular Cloud Populations in Star-forming Dwarf and Spiral Galaxies
• Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 region. IV Interaction between the Outflow and the Dense Gas in the Cluster Forming Region of OMC-2 FIR 6
• Submillimeter Array Observations of NGC 2264-C: Molecular Outflows and Driving Sources
• The structure of molecular gas associated with NGC2264: wide-field 12CO and H2 imaging
• Cluster formation in molecular clouds: I. stellar populations, star formation rates, and ionizing radiation
• X Marks the Spot: Nexus of Filaments, Cores, and Outflows in a Young Star-Forming Region
• CN Zeeman observations of the NGC 2264-C protocluster