ALMA Fragmented Source Catalogue in Orion (FraSCO) I. Outflow interaction within an embedded cluster in OMC-2/FIR3, FIR4, and FIR5

Abstract

We present a high angular resolution ($\sim 1"$) and wide-field ($2^{\prime }.9\times 1^{\prime }.9$) image of the 1.3-mm continuum, CO($J$ = 2--1) line, and SiO($J$ = 5--4) line emissions toward an embedded protocluster, FIR3, FIR4, and FIR5, in the Orion Molecular Cloud 2 obtained from the Atacama Large Millimeter/submillimeter Array (ALMA). We identify 51 continuum sources, 36 of which are newly identified in this study. Their dust masses, projected sizes, and ${\mathrm{H}}_2$ gas number densities are estimated to be $3.8\times 10^{-5}$--$1.1\times 10^{-2}{\mathrm{M}}_{\odot }$, 290--2000 au, and $6.4\times 10^6$--$3.3\times 10^8\mathrm{c}{\mathrm{m}}^{-3}$, respectively. The results of a Jeans analysis show that $\sim 80\%$ of the protostellar sources and $\sim 15\%$ of the prestellar sources are gravitationally bound. We identify 12 molecular outflows traced in the CO($J$ = 2--1) emission, six of which are newly detected. We spatially resolve shocked gas structures traced by the SiO($J$ = 5--4) emission in this region for the first time. We identify shocked gas originating from outflows and other shocked regions. These results provide direct evidence of an interaction between a dust condensation, FIR4, and an energetic outflow driven by HOPS-370 located within FIR3. A comparison of the outflow dynamical timescales, fragmentation timescales, and protostellar ages shows that the previously proposed triggered star-formation scenario in FIR4 is not strongly supported. We also discuss the spatial distribution of filaments identified in our continuum image by comparing it with a previously identified hub-fiber system in the ${\mathrm{N}}_2{\mathrm{H}}^{+}$ line.

45 pages, 24 figures, 2 figure sets, 2 animations, Accepted for publication in ApJ

References in corpus (28)

• CASA, the Common Astronomy Software Applications for Radio Astronomy
• Structural Analysis of Molecular Clouds: Dendrograms
• Filamentary structure of star-forming complexes
• The Nature of the Dense Core Population in the Pipe Nebula: Thermal Cores Under Pressure
• A SCUBA survey of Orion, the low-mass end of the core mass function
• Magnetic Fields and Rotations of Protostars
• Impact of Protostellar Outflows on Turbulence and Star Formation Efficiency in Magnetized Dense Cores
• SOLIS II. Carbon-chain growth in the Solar-type protocluster OMC2-FIR4
• High-mass Star Formation through Filamentary Collapse and Clump-fed Accretion in G22
• The Green Bank Ammonia Survey: Dense Cores Under Pressure in Orion A
• Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region. III. An Extensive Survey for Molecular Outflows
• Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region. II. Observational Evidence for Outflow-Triggered Star Formation in the OMC-2 FIR 3/4 Region
• Dense core properties in the Infrared Dark cloud G14.225-0.506 revealed by ALMA
• Silicon Monoxide Observations Reveal a Cluster of Hidden Compact Outflows in the OMC1 South Region
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars IV. Unveiling the Embedded Intermediate-Mass Protostar and Disk within OMC2-FIR3/HOPS-370
• The VLA/ALMA Nascent Disk and Multiplicity (VANDAM) Survey of Orion Protostars I. Identifying and Characterizing the Protostellar Content of the OMC2-FIR4 and OMC2-FIR3 Regions
• An HST Survey of Protostellar Outflow Cavities: Does Feedback Clear Envelopes?
• Nobeyama 45-m Mapping Observations toward Orion A.I. Molecular Outflows
• The hierarchical fragmentation of filaments and the role of sub-filaments
• The CARMA-NRO Orion Survey: Protostellar Outflows, Energetics, and Filamentary Alignment
• The DR21(OH) Trident -- Resolving the Massive Ridge into Three Entangled Fibers As the Initial Condition of Cluster Formation
• Herschel/PACS far-IR spectral imaging of a jet from an intermediate mass protostar in the OMC-2 region
• SiO Outflows as Tracers of Massive Star Formation in Infrared Dark Clouds
• Convergent Filaments Contracting Towards an Intermediate-mass Prestellar Core
• Filament Intersections and Cold Dense Cores in Orion A North
• Mid-$J$ CO Line Observations of Protostellar Outflows in the Orion Molecular Clouds
• Seeds of Life in Space (SOLIS). XIII. Nitrogen fractionation towards the protocluster OMC-2 FIR4
• Super-fast Rotation in the OMC 2/FIR 6b Jet

Cited by in corpus (6)

• JWST detections of amorphous and crystalline HDO ice toward massive protostars
• Emergence of high-mass stars in complex fiber networks (EMERGE). I. Early ALMA Survey: observations and massive data reduction
• Emergence of high-mass stars in complex fiber networks (EMERGE) II. The need for data combination in ALMA observations
• An ALMA search for substructure and fragmentation in starless cores in Orion B North
• SOLIS XVII: Jet candidate unveiled in OMC-2 and its possible link to the enhanced cosmic-ray ionisation rate
• Looking for evidence of high-mass star formation at core scale in a massive molecular clump