Silicon Monoxide Observations Reveal a Cluster of Hidden Compact Outflows in the OMC1 South Region

Abstract

We present high angular resolution ($2\text{.}{}^{\prime \prime }8\times 1\text{.}{}^{\prime \prime }7$) SiO J=5$\to$4; $v=0$ line observations of the OMC1S region in the Orion Nebula made using the Submillimeter Array (SMA). We detect for the first time a cluster of four compact bipolar and monopolar outflows that show high, moderate and low velocity gas and appear to be energized by millimeter and infrared sources associated with this region. The SiO molecular outflows are compact ($<$ 3500 AU), and in most of the cases, they are located very close to their exciting sources. We thus propose that the SiO thermal emission is tracing the youngest and most highly excited parts of the outflows which cannot be detected by other molecules. Moreover, since the ambient cloud is weak in the SiO line emission, these observations can reveal flows that in other molecular transitions will be confused with the ambient velocity cloud emission. Analysis of their positional-velocity diagrams show that some components of these outflows may be driven by wide-angle winds very close to the exciting object. Finally, we find that some of these SiO outflows seem to be the base of powerful Herbig-Haro jets and large-scale molecular flows that emanate from a few arcseconds around this zone. In particular, we find a strongly excited SiO bipolar outflow with a P.A. of $\sim$ 100${}^{\circ }$, that is likely energized by the luminous ($\sim$ 3 $\times$ 10${}^3$ L${}_{\odot }$) infrared protostar "B" and could be the base of the remarkable object HH269.

arXiv commentAccepted by the Astrophysical Journal

References in corpus (15)

• The Submillimeter Array
• The Luminosity & Mass Function of the Trapezium Cluster: From B stars to the Deuterium Burning Limit
• A study of high velocity molecular outflows with an up-to-date sample
• Infrared L Band Observations of the Trapezium Cluster: A Census of Circumstellar Disks and Candidate Protostars
• Jet/cloud collision, 3D gasdynamic simulations of HH 110
• SiO J=5--4 in the HH211 Protostellar Jet Imaged with the SMA
• Compact Radio Sources in Orion: New Detections, Time Variability, and Objects in OMC-1S
• Deep 3.8 micron Observations of the Trapezium Cluster
• Submillimeter emission from the hot molecular jet HH 211
• The Orion Nebula in the mid-IR
• Bow shocks, Wiggling Jets, and Wide-Angle Winds: A High Resolution Study of the Entrainment Mechanism of the PV Ceph Molecular (CO) Outflow
• A Highly Collimated, Young and Fast CO(2-1) Outflow in OMC1 South
• A Cluster of 1.3 cm Continuum Sources in OMC1 South
• Thermal-IR Detection of Optical Outflow Sources in OMC1 South
• Kinematics of Herbig-Haro Objects and Jets in the Orion Nebula

Cited by in corpus (31)

• Explosive Disintegration of a Massive Young Stellar System in Orion
• Proplyds and Massive Disks in the Orion Nebula Cluster Imaged with CARMA and SMA
• Molecular jets from low-mass young protostellar objects
• Hierarchical Fragmentation of the Orion Molecular Filaments
• A near-IR spectroscopic survey of massive jets towards EGOs
• The three dimensional dynamic structure of the inner Orion Nebula
• `Tail-end' Bondi-Hoyle accretion in young star clusters: Implications for disks, planets, and stars
• Thermal Jeans fragmentation within 1000 AU in OMC-1S
• High Velocity Features in the Orion Nebula
• Three intermediate-mass YSOs with different properties emerging from the same natal cloud in IRAS 00117+6412
• Discovery of the Youngest Molecular Outflow associated with an Intermediate-mass protostellar Core, MMS-6/OMC-3
• A rotating molecular jet in Orion
• Stellar Proper Motions in the Orion Nebula Cluster
• Large Scale Flows from Orion-South
• The APEX-CHAMP+ view of the Orion Molecular Cloud 1 core - Constraining the excitation with submillimeter CO multi-line observations
• Unveiling the nature and interaction of the intermediate/high-mass YSOs in IRAS 20343+4129
• The Proper Motions of the Double Radio Source n in the Orion BN/KL Region
• On the nature of outflows in intermediate-mass protostars: a case study of IRAS 20050+2720
• The role of low-mass star clusters in massive star formation. The Orion Case
• A non-equilibrium ortho-to-para ratio of water in the Orion PDR
• High Velocity Molecular Outflows In Massive Cluster Forming Region G10.6-0.4
• The Nature and Frequency of Outflows from Stars in the Central Orion Nebula Cluster
• Analysis of the Herschel/HEXOS Spectral Survey Towards Orion South: A massive protostellar envelope with strong external irradiation
• X-ray embedded stars as driving sources of outflow-driven turbulence in OMC1-S
• CO Spectral Line Energy Distributions in Galactic Sources: Empirical Interpretation of Extragalactic Observations
• ALMA Fragmented Source Catalogue in Orion (FraSCO) I. Outflow interaction within an embedded cluster in OMC-2/FIR3, FIR4, and FIR5
• Physical Conditions and Kinematics of the Filamentary Structure in Orion Molecular Cloud 1
• Warm gas in protostellar outflows. II. EHV jet and outflows from OMC-2/3
• Near-Infrared Polarization Images of The Orion Molecular Cloud 1 South Region
• Searching for Molecular Jets from High-Mass Protostars
• The Integral Field View of the Orion Nebula