Radio Imaging of the NGC 1333 IRAS 4A Region: Envelope, Disks, and Outflows of a Protostellar Binary System

Abstract

The NGC 1333 IRAS 4A protobinary was observed in the 1.3 cm and 6.9 mm continuum and the ammonia and SiO lines, with an angular resolution of about 0.4 arcseconds. The continuum maps show the circumstellar structures of the two protostars, A1 and A2. The A1 system is brighter and more massive than the A2 system. The ratio of mass, including dense gas and protostar, is about 6. The properties of the circumstellar disks and outflows suggest that A1 may be younger than A2. The deflected part of the northeastern jet of A2 is bright in the SiO line, and the distance between the brightest peak and deflection point suggests that the enhancement of SiO takes about 100 yr after the collision with a dense core. The ammonia maps show a small structure that seems to be a part of the obstructing core. The outflow properties were studied by comparing interferometric maps of SiO, ammonia, formaldehyde, and HCN lines. Their overall structures agree well, suggesting that these species are excited by the same mechanism. However, the intensity distributions show that SiO is chemically unique. SiO may be directly linked to the primary jet while the other species may be tracing the entrained ambient gas.

To appear in the PASJ

References in corpus (9)

• SiO line emission from C-type shock waves : interstellar jets and outflows
• A highly-collimated SiO jet in the HH212 protostellar outflow
• Kinematics of the Ammonia Disk around the Protostar NGC 1333 IRAS 4A2
• Variability of the NGC 1333 IRAS 4A Outflow: Molecular Hydrogen and Silicon Monoxide Images
• Time-Resolved AU-Scale Jets Traced by Masers in the IRAS 4A/B Regions of NGC1333
• Rotation of the NGC 1333 IRAS 4A2 Protostellar Jet
• Ammonia Imaging of the Disks in the NGC 1333 IRAS 4A Protobinary System
• Observations of Water Masers in the NGC 1333 IRAS 4 Region
• Numerical Simulations of a Protostellar Outflow Colliding with a Dense Molecular Cloud

Cited by in corpus (17)

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• Jet multiplicity in the proto-binary system NGC1333-IRAS4A. The detailed CALYPSO IRAM-PdBI view
• The JCMT Gould Belt Survey: Evidence for Dust Grain Evolution in Perseus Star-forming Clumps
• Seeds of Life in Space (SOLIS). X. Interstellar Complex Organic Molecules in the NGC 1333 IRAS 4A outflows
• Seeds of Life in Space (SOLIS). VI. Chemical evolution of sulfuretted species along the outflows driven by the low-mass protostellar binary NGC1333-IRAS4A
• Implications of a hot atmosphere/corino from ALMA observations towards NGC1333 IRAS 4A1
• Water distribution in shocked regions of the NGC1333-IRAS4A protostellar outflow
• Detection of Linearly Polarized 6.9 mm Continuum Emission from the Class 0 Young Stellar Object NGC1333 IRAS4A
• The Infall Motion in the Low-Mass Protostellar Binary NGC 1333 IRAS 4A1/4A2
• ALMA Observations toward the S-shaped Outflow and the Envelope around NGC1333 IRAS 4A2
• Nitrogen fractionation in ammonia and its insights on nitrogen chemistry
• Precessing Jet and Large Dust Grains in the V380 Ori NE Star-forming Region
• Steady Twin-Jets Orientation: Implications For Their Formation Mechanism
• FAUST XV. A disk wind mapped by CH${}_3$OH and SiO in the inner 300 au of the NGC 1333 IRAS 4A2 protostar
• The first interferometric measurements of NH${}_2$D/NH${}_3$ ratio in hot corinos
• Power spectra of outflow-driven turbulence