SIMBAD references

2010ApJ...708....1P - Astrophys. J., 708, 1-8 (2010/January-1)

Chandra observations of the radio galaxy 3C 445 and the hot spot X-ray emission mechanism.


Abstract (from CDS):

We present new Chandra observations of the radio galaxy 3C 445, centered on its southern radio hot spot. Our observations detect X-ray emission displaced upstream and to the west of the radio-optical hot spot. Attempting to reproduce both the observed spectral energy distribution and the displacement excludes all one-zone models. Modeling of the radio-optical hot spot spectrum suggests that the electron distribution has a low-energy cutoff or break approximately at the proton rest mass energy. The X-rays could be due to external Compton scattering of the cosmic microwave background coming from the fast (Lorentz factor Γ ~ 4) part of a decelerating flow, but this requires a small angle between the jet velocity and the observer's line of sight (θ ~ 14°). Alternatively, the X-ray emission can be synchrotron from a separate population of electrons. This last interpretation does not require the X-ray emission to be beamed.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: 3C 445 - galaxies: jets - radio continuum: galaxies - X-rays: galaxies

Nomenclature: Fig. 1, Table 2: [PGM2010] X-ray N=1, [PGM2010] NIRN (Nos NIR1-NIR3), [PGM2010] Radio N=1.

Simbad objects: 19

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