منابع مشابه
The 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...
متن کاملThe Outburst of Hst-1 in the M87 Jet
The X-ray intensity of knot HST-1, 0.85 from the nucleus of the radio galaxy M87, has increased by more than a factor of 50 during the last 5 years. The optical increase is similar and our more limited radio data indicate a commensurate activity. We give the primary results of our Chandra X-ray Observatory monitoring program and consider some of the implications of this extreme variability in a...
متن کاملA Modified Synchrotron Model for Knots in the M87 Jet
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...
متن کاملMonth-timescale Optical Variability in the M87 Jet
A previously inconspicuous knot in the M87 jet has undergone a dramatic outburst and now exceeds the nucleus in optical and X-ray luminosity. Monitoring of M87 with the Hubble Space Telescope and Chandra X-ray Observatory during 2002-2003, has found month-timescale optical variability in both the nucleus and HST-1, a knot in the jet 0.82 from the nucleus. We discuss the behavior of the variabil...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2017
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/stx1767