SIMBAD references

2002ApJ...568L..81D - Astrophys. J., 568, L81-L84 (2002/April-1)

X-ray synchrotron spectral hardenings from Compton and synchrotron losses in extended Chandra jets.


Abstract (from CDS):

Chandra observations of knots and hot spots in spatially resolved X-ray jets of radio galaxies show that the X-ray fluxes often lie above an extrapolation from the radio-to-optical continuum fluxes. We show that combined synchrotron and Compton losses on a single-power-law electron injection function can produce a hardening in the electron spectrum at electron Lorentz factors of γ~2x108/[Γ(1+z)] owing to Klein-Nishina energy losses on the cosmic microwave background radiation. Here Γ is the bulk Lorentz factor of the outflow and z is the source redshift. This produces a flattening in the spectrum at frequencies of ≳8x1016δBµG/[Γ2(1+z)3] Hz, where BµG is the magnetic field in the comoving plasma frame in units of microgauss and δ is the Doppler factor. A single population of synchrotron-emitting electrons may therefore produce the radio-to-X-ray continuum in some radio galaxy knots, such as those in 3C 273.

Abstract Copyright:

Journal keyword(s): Galaxies: Active - Galaxies: Jets - Gamma Rays: Theory - Radiation Mechanisms: Nonthermal - X-Rays: Galaxies

Simbad objects: 11

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