"Chandra Observations Of The Radio Galaxy 3C 445 And The Hot Spot X-Ray" by Eric S. Perlman, Markos Georganopoulos et al.
 

Document Type

Article

Publication Title

The Astrophysical Journal

Abstract

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.

DOI

10.1088/0004-637X/708/1/1

Publication Date

1-1-2010

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