MHD MODELS AND SYNTHETIC SYNCHROTRON MAPS FOR THE JET OF M87
نویسندگان
چکیده
منابع مشابه
Synthetic Synchrotron Emission Maps from Mhd Models for the Jet of M87
We present self-consistent global, steady-state MHD models and synthetic optically thin synchrotron emission maps for the jet of M87. The model consist of two distinct zones: an inner relativistic outflow, which we identify with the observed jet, and an outer cold disk-wind. While the former does not selfcollimate efficiently due to its high effective inertia, the latter fulfills all the condit...
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For explaining the broadband spectral shape of knots in the M87 jet from radio through optical to X-ray, we propose a modified synchrotron model that considers the integrated effect of particle injection from different acceleration sources in the thin acceleration region. This results in two break frequencies at two sides of which the spectral index of knots in the M87 jet changes. We discuss t...
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We propose that the intensity changes and spectral evolution along the M87 jet can be explained by adiabatic changes to the particle momentum distribution function and the magnetic field. This is supported by the lack of any significant variation in the radio–to–optical spectral index along the jet and the moderate changes in radio brightness. Assuming a simple scaling law between magnetic fiel...
متن کاملThe M87 Jet
We investigate the structure and dynamics of the M87 jet based on multi-frequency VLBI observations and MHD jet theories. Millimeter VLBI cores are considered as innermost jet emissions. The jet structure up to ∼ 105 rs is described as a parabolic streamline, indicating the lateral expansion under a confinement by the stratified ISM. Thus, the jet collimation maintains in five orders of magnitu...
متن کاملThe M87 Jet - J.A. Biretta
We review the current observational status of the M87 jet at radio, optical, and X-ray frequencies. Special attention is paid to the radio morphology, the radio-to-X-ray spectrum, measurement of proper motions, and optical evidence for a counter-jet. The problem of jet confinement is discussed, as well as models for the radio-to-X-ray spectrum and the related problem of particle lifetimes. Fina...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics D
سال: 2008
ISSN: 0218-2718,1793-6594
DOI: 10.1142/s0218271808013303