HH 212: SMA Observations of a Remarkable Protostellar Jet

Abstract

HH 212 is a nearby (460 pc) protostellar jet discovered in H${}_2$ powered by a Class 0 source, IRAS 05413-0104, in the L1630 cloud of Orion. It is highly collimated and symmetric with matched pairs of bow shocks on either side of the source. We have mapped it in 850 $\mu$m continuum, SiO ($J=8-7$), CO ($J=3-2$), SO ($N_J=8_9-7_8$), HCO${}^{+}$ ($J=4-3$), and H${}^{13}$CO${}^{+}$ ($J=4-3$) emission simultaneously at $\sim$ 1${}^{\prime \prime }$ resolution with the Submillimeter Array (SMA). Thermal dust emission is seen in continuum around the source, mainly arising from an inner envelope (i.e., the inner part of a previously seen flattened envelope) and a possible disk. The inner envelope is also seen with rotation in CO, HCO${}^{+}$, and probably SO. Like H${}_2$ emission, CO and SiO emission are seen along the jet axis but extending closer to the source, tracing the bow shocks with a broad range of velocities and the continuous structures in between. SO emission is seen only around the source, forming a jetlike structure extending along the jet axis from the source, likely tracing the jet near the launching region. The jet is episodic and bending. It may also be slightly precessing as the jetlike SO structure shows a slight S-shaped symmetry about the source. A hint of jet rotation is also seen across the jet axis. Internal outflow shells are seen in CO and HCO${}^{+}$, associated with the bow shocks in the inner part of the jet. The bases of the HCO${}^{+}$ shells are seen with a hint of rotation similar to that seen in the inner envelope, probably consisted mainly of the material extended from the inner envelope and even the possible disk.

arXiv comment18 pages, 12 figures, Accepted by the ApJ

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Cited by in corpus (60)

• Theory of Star Formation
• Modeling jet and outflow feedback during star cluster formation
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• Extreme Active Molecular Jets in L1448C
• Formation and Atmosphere of Complex Organic Molecules of the HH 212 Protostellar Disk
• Rotation and Outflow motions in the very low-mass Class 0 protostellar system HH 211 at subarcsecond resolution
• Episodic molecular outflow in the very young protostellar cluster Serpens South
• The ALMA view of the protostellar system HH212 - The wind, the cavity, and the disk
• Molecular ions in the protostellar shock L1157-B1
• ALMA Results of the Pseudodisk, Rotating disk, and Jet in Continuum and HCO+ in the Protostellar System HH 212
• Molecular jets from low-mass young protostellar objects
• Submillimeter arcsecond-resolution mapping of the highly collimated protostellar jet HH 211
• The CALYPSO IRAM-PdBI survey of jets from Class 0 protostars. Are jets ubiquitous in young stars ?
• A Critical Examination of the X-Wind Model for Chondrule and Calcium-rich, Aluminum-rich Inclusion Formation and Radionuclide Production
• The jet and the disk of the HH 212 low-mass protostar imaged by ALMA: SO and SO2 emission
• The reflection-symmetric wiggle of the young protostellar jet HH 211
• Jet Motion, Internal Working Surfaces, and Nested Shells in the Protostellar System HH 212
• A 100 au-Wide Bipolar Rotating Shell Emanating From The HH 212Protostellar Disk: A Disk Wind?
• High-Velocity Jets and Slowly Rotating Envelope in B335
• ALMA observations of the very young Class 0 protostellar system HH 211-mms: a 30-au dusty disk with a disk-wind traced by SO?
• Water and acetaldehyde in HH212: The first hot corino in Orion
• Assessing molecular outflows and turbulence in the protostellar cluster Serpens South
• Direct Imaging of a Compact Molecular Outflow from a Very Low-luminosity Object; L1521F-IRS
• X-winds in Action
• Molecule formation in dust-poor irradiated jets I. Stationary disk winds
• High SiO abundance in the HH212 protostellar jet
• Deuterated methanol on Solar System scale around the HH212 protostar
• Discovery of the Youngest Molecular Outflow associated with an Intermediate-mass protostellar Core, MMS-6/OMC-3
• JWST Observations of Young protoStars (JOYS). HH 211: the textbook case of a protostellar jet and outflow
• SiO collimated outflows driven by high-mass YSOs in G24.78+0.08
• Water and interstellar complex organics associated with the HH 212 protostellar disc - On disc atmospheres, disc winds, and accretion shocks
• Proper motions of collimated jets from intermediate-mass protostars in the Carina Nebula
• Prestellar and protostellar cores in Ori B9
• Angular Momentum in Disk Wind Revealed in the Young Star MWC349A
• Shaping the envelope of the asymptotic giant branch star W43A with a collimated fast jet
• Magneto-Centrifugal Origin for Protostellar Jets Validated through Detection of Radial Flow at the Jet Base
• Molecular Jet of IRAS 04166+2706
• Protostellar Evolution in Serpens Main: Possible Origin of Disk-Size Diversity
• The H2 velocity structure of inner knots in HH 212: asymmetries and rotation
• Submillimeter Array High-angular Resolution Observations of the Monoceros R2 Star Forming Cluster
• Hot methanol from the inner region of the HH 212 protostellar system
• The Giant Herbig-Haro Flow HH 212 and Associated Star Formation
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Evidence for a Molecular Jet Launched at an Unprecedented Early Phase of Protostellar evolution
• Ejection History of the IRAS 04166+2706 Molecular Jet
• The HH 212 interstellar laboratory: astrochemistry as a tool to reveal protostellar disks on Solar System scales around a rising Sun
• A very young, compact bipolar H${}_2$O maser outflow in the intermediate-mass star-forming LkH$\alpha$ 234 region
• The Envelope Kinematics and a Possible Disk Around the Class 0 Protostar within BHR7
• Evolution of the atomic component in protostellar outflows
• SiO: Not the perfect outflow tracer: Outflow studies of the massive star formation region IRAS 19410+2336
• 13CO and C18O J=2-1 mapping of the environment of the Class 0 protostellar core SMM 3 in Orion B9
• Constraining the Chemical Signatures and the Outburst Mechanism of the Class 0 Protostar HOPS 383
• The jet/counter-jet symmetry of the HH 212 outflow
• Episodic Model For Star Formation History and Chemical Abundances in Giant and Dwarf Galaxies
• Radio spectra of protostellar jets: Thermal and non-thermal emission
• Modeling of thermal and non-thermal radio emission from HH80-81 jet
• Sulfur oxides tracing streamers and shocks at low mass protostellar disk-envelope interfaces
• First Detection of Equatorial Dark Dust Lane in a Protostellar Disk at Submillimeter Wavelength
• Low-mass Star Formation: Observations
• ALMA Survey of Orion Planck Galactic Cold Clumps (ALMASOP): Deriving Inclination Angle and Velocity of the Protostellar Jets from their SiO Knots