作者: M. Birkinshaw , M. Birkinshaw , E. S. Perlman , D. M. Worrall , D. M. Worrall
DOI: 10.1088/0004-637X/695/1/707
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摘要: Long Baseline Array imaging of the z = 0.663 broadline radio galaxy PKS 1421−490 reveals a 400 pc diameter high surface brightness hot spot at projected distance ∼40 kpc from active galactic nucleus. The isotropic X-ray luminosity spot, L2–10 keV 3 × 10 44 ergs s −1 , is comparable to entire jet 0637−752, and peak hundreds times greater than that brightest in Cygnus A. We model spectral energy distribution using one-zone synchrotron self-Compton with near equipartition magnetic field strength mG. There strong asymmetry between approaching receding hotspots spectrum remains flat (α ≈ 0.5) well beyond predicted cooling break for mG field, indicating hotspot emission may be Doppler beamed. A plasma velocity terminal shock could result dynamically important jet. change slope GHz frequencies, which we by incorporating cutoff electron γmin 650, higher values implied if show sharp decrease number density below Lorentz factor 650 would arise dissipation bulk kinetic an electron/proton Γjet 5.