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• W2104724576 abstract "We present an analysis of the kinematics and physical properties of the Class I driven jet HH46-47 based on IR medium and low resolution spectroscopy obtained with ISAAC on VLT. Our aim is to study the gas physics as a function of the velocity and distance from the source and compare the results with similar studies performed on other Class I and CTTS jets, as well as with existing models for the jet formation and excitation. The ratios and luminosities of several important diagnostic lines have been used to derive physical parameters. [FeII] and H2 Position Velocity Diagrams (PVDs) have been in addition constructed to study the kinematics. Within 1000-2000 AU from the source the atomic gas presents a wide range of radial velocities. Only the gas component at the highest velocity (HVC) survives at large distances. The H2, shows, close to the source, only a single velocity component at almost zero velocity, while it reaches higer velocities further downstream. Electron densities (ne) and mass ejection fluxes (Mjet) have been measured separately for the HVC and LVC from the [FeII] lines. ne increases with decreasing velocities, while the opposite occurs for Mjet. The mass flux carried out by the molecular component, measured from the H2 lines flux, is ~4 10^-9 Msun/yr. We have estimated that the Fe gas phase abundance is significantly lower than the solar value, with ~88% of iron still depleted onto dust grains in the internal jet region. The derived densities and mass flux values are typical of Class I objects or very active TTauri stars. However, the spatial extent of the LVC and the velocity dependence of the electron density have been so far observed only in another Class I jet, the HH34 jet, and are not explained by the current models of jet launching." @default.
• W2104724576 created "2016-06-24" @default.
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• W2104724576 date "2010-02-01" @default.
• W2104724576 modified "2023-09-27" @default.
• W2104724576 title "IR diagnostics of embedded jets: kinematics and physical characteristics of the HH46-47 jet" @default.
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• W2104724576 doi "https://doi.org/10.1051/0004-6361/200913304" @default.
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