Investigating Particle Acceleration in Protostellar Jets: The Triple Radio Continuum Source in Serpens

Abstract

While most protostellar jets present free-free emission at radio wavelengths, synchrotron emission has been also proposed to be present in a handful of these objects. The presence of non-thermal emission has been inferred by negative spectral indices at centimeter wavelengths. In one case (the HH 80-81 jet arising from a massive protostar), its synchrotron nature was confirmed by the detection of linearly polarized radio emission. One of the main consequences of these results is that synchrotron emission implies the presence of relativistic particles among the non-relativistic material of these jets. Therefore, an acceleration mechanism should be taking place. The most probable scenario is that particles are accelerated when the jets strongly impact against the dense envelope surrounding the protostar. Here, we present an analysis of radio observations obtained with the Very Large Array of the Triple Radio Source in the Serpens star-forming region. This object is known to be a radio jet arising from an intermediate-mass protostar. It is also one of the first protostellar jets where the presence of non-thermal emission was proposed. We analysed the dynamics of the jet as well as the nature of the emission and discuss these issues in the context of the physical parameters of the jet and the particle acceleration phenomenon.

Astrophysical Journal (in press). 24 pages (9 figures). Contact: Adriana Rodríguez-Kamenetzky ([email protected])

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Cited by in corpus (30)

• Radio Jets from Young Stellar Objects
• ALMA observations of dust polarization and molecular line emission from the Class 0 protostellar source Serpens SMM1
• The Role of Magnetic Fields in Protostellar Outflows and Star Formation
• Weak and Compact Radio Emission in Early High-Mass Star Forming Regions: I. VLA Observations
• Characterizing magnetic field morphologies in three Serpens protostellar cores with ALMA
• The Highly Collimated Radio Jet of HH 80-81: Structure and Non-Thermal Emission
• Star Formation Under the Outflow: The Discovery of a Non-Thermal Jet from OMC-2 FIR 3 and its Relationship to the Deeply Embedded FIR 4 Protostar
• Protostellar Outflows at the EarliesT Stages (POETS). II. A possible radio synchrotron jet associated with the EGO G035.02+0.35
• Magnetically regulated collapse in the B335 protostar? II. Observational constraints on gas ionization and magnetic field coupling
• The Proper Motions of the Double Radio Source n in the Orion BN/KL Region
• An extremely high velocity molecular jet surrounded by an ionized cavity in the protostellar source Serpens SMM1
• A Galactic survey of radio jets from massive protostars
• On the fragmentation boundary in magnetised self-gravitating discs
• A search for non-thermal radio emission from jets of massive young stellar objects
• Detection of non-thermal emission from the massive protostellar jet HH80-81 at low radio frequencies using GMRT
• Particle acceleration in the Herbig-Haro objects HH 80 and HH 81
• The VLA Nascent Disk And Multiplicity Survey of Perseus Protostars (VANDAM). III. Extended Radio Emission from Protostars in Perseus
• Radio Stars: from kHz to THz
• Zooming into the Collimation Zone in a Massive Protostellar Jet
• Momentum-driven outflow emission from an O-type YSO: Comparing the radio jet with the molecular outflow
• High-energy radiation from collisions of high velocity clouds and the Galactic disk
• Detection of Gamma-Rays from the Protostellar Jet in the HH 80-81 System
• Characterizing the radio continuum nature of sources in the massive star-forming region W75N (B)
• A Unified Model for Bipolar Outflows from Young Stars: Apparent Magnetic Jet Acceleration
• Investigation of the WR 11 field at decimeter wavelengths
• Resolving the collimation zone of an intermediate-mass protostar
• Helical Magnetic Field in a Massive Protostellar Jet
• Radio spectra of protostellar jets: Thermal and non-thermal emission
• Are Stellar Embryos in Perseus Radio-Synchrotron Emitters? Statistical data analysis with Herschel and LOFAR paving the way for the SKA
• A Dual-Band Centimetre Continuum Monitoring Survey of Young Stellar Objects in the Coronet Cluster