Modeling of thermal and non-thermal radio emission from HH80-81 jet

Abstract

Protostellar jets are one of the primary signposts of star formation. A handful of protostellar objects exhibit radio emission from ionized jets, of which a few display negative spectral indices, indicating the presence of synchrotron emission. In this study, we characterize the radio spectra of HH80-81 jet with the help of a numerical model that we have developed earlier, which takes into account both thermal free-free and non-thermal synchrotron emission mechanisms. For modeling the HH80-81 jet, we consider jet emission towards the central region close to the driving source along with two Herbig-Haro objects, HH80 and HH81. We have obtained the best-fit parameters for each of these sources by fitting the model to radio observational data corresponding to two frequency windows taken across two epochs. Considering an electron number density in the range $10^3-10^5$ cm${}^{-3}$, we obtained the thickness of the jet edges and fraction of relativistic electrons that contribute to non-thermal emission in the range $0.01^{\circ }-0.1^{\circ }$ and $10^{-7}-10^{-4}$, respectively. For the best-fit parameter sets, the model spectral indices lie in the range of -0.15 to +0.11 within the observed frequency windows.

14 pages, 6 figures, Accepted for publication in the Journal of Astrophysics and Astronomy

References in corpus (9)

• A Magnetized Jet from a Massive Protostar
• HH 212: SMA Observations of a Remarkable Protostellar Jet
• Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region. II. Observational Evidence for Outflow-Triggered Star Formation in the OMC-2 FIR 3/4 Region
• IC348-SMM2E: a Class 0 proto-brown dwarf candidate forming as a scaled-down version of low-mass stars
• The Highly Collimated Radio Jet of HH 80-81: Structure and Non-Thermal Emission
• Modeling the accretion disk around the high-mass protostar GGD 27-MM1
• Detection of non-thermal emission from the massive protostellar jet HH80-81 at low radio frequencies using GMRT
• Particle acceleration and magnetic field amplification in massive young stellar object jets
• Radio spectra of protostellar jets: Thermal and non-thermal emission

Cited by in corpus (1)

• Investigating Protostellar Accretion-Driven Outflows Across the Mass Spectrum: JWST NIRSpec IFU 3-5~$\mu$m Spectral Mapping of Five Young Protostars