CALYPSO view of SVS 13A with PdBI: Multiple jet sources

Abstract

Aims. We wish to clarify the origin of the multiple jet features emanating from the binary protostar SVS 13A (= VLA4A/VLA4B). Methods. We used the Plateau de Bure Interferometer to map at 0.3-0.8" (~70-190 au) dust emission at 1.4 mm, CO(2-1), SiO(5-4), SO(65-54). Revised proper motions for VLA4A/4B and jet wiggling models are computed to clarify their respective contribution. Results. VLA4A shows compact dust emission suggestive of a disk < 50 au, and is the hot corino source, while CO/SiO/SO counterparts to the small-scale H2 jet originate from VLA4B and reveal the jet variable velocity structure. This jet exhibits ~ 3" wiggling consistent with orbital motion around a yet undetected ~ 20-30 au companion to VLA4B, or jet precession. Jet wiggling combined with velocity variability can explain the large apparent angular momentum in CO bullets. We also uncover a synchronicity between CO jet bullets and knots in the HH7-11 chain demonstrating that they trace two distinct jets. Their ~ 300 yr twin outburst period may be triggered by close perihelion approach of VLA4A in an eccentric orbit around VLA4B. A third jet is tentatively seen at PA ~ 0 degrees. Conclusions. SVS13 A harbors at least 2 and possibly 3 distinct jet sources. The CO and HH7-11 jets are launched from quasi-coplanar disks, separated by 20-70 au. Their synchronous major events every 300 yr favor external triggering by close binary interactions, a scenario also invoked for FU Or outbursts.

9 pages, 11 figures

References in corpus (4)

• Shedding light on the formation of the pre-biotic molecule formamide with ASAI
• Glycolaldehyde in Perseus young solar analogs
• The Launch Region of the SVS 13 Outflow and Jet
• Proper Motions of Thermal Radio Sources near HH 7-11 in the NGC 1333 Star Forming Region

Cited by in corpus (18)

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• Searching for kinematic evidence of Keplerian disks around Class 0 protostars with CALYPSO
• KMOS study of the mass accretion rate from Class I to Class II in NGC 1333
• PRODIGE -- Envelope to Disk with NOEMA II. Small-scale temperature structure and a streamer feeding the SVS13A protobinary using CH3CN and DCN
• The two hot corinos of the SVS13-A protostellar binary system: counterposed siblings
• Probing the physics of star formation (ProPStar): I. First resolved maps of the electron fraction and cosmic-ray ionization rate in NGC 1333
• The Physical Properties of the SVS 13 Protobinary System: Two Circumstellar Disks and a Spiraling Circumbinary Disk in the Making
• The SVS13-A Class I chemical complexity as revealed by S-bearing species. SOLIS XIII
• CH${}_3$CN deuteration in the SVS13-A Class I hot-corino. SOLIS XV
• Streamers feeding the SVS13-A protobinary system: astrochemistry reveals accretion shocks?
• Mass ejection and time variability in protostellar outflows: Cep E. SOLIS XVI
• PRODIGE -- Envelope to Disk with NOEMA III. The origin of complex organic molecule emission in SVS13A
• SOFIA/EXES observations of warm H${}_2$ at high spectral resolution: witnessing para-to-ortho conversion behind a molecular shock wave in HH7
• Detection of a dense SiO jet in the evolved protostellar phase
• Probing the hidden atomic gas in Class I jets with SOFIA
• Proper Motions and Shock Wave Dynamics in the HH 7-11 Stellar Jet
• PRODIGE VI -- Envelope to Disk with NOEMA: VI. The Missing Sulfur Problem
• Bowshocks driven by the pole-on molecular jet of outbursting protostar SVS 13