Query : 2001A&A...372..755B

2001A&A...372..755B - Astronomy and Astrophysics, volume 372, 755-767 (2001/6-4)

Anisotropic inverse Compton scattering in powerful radio galaxies: The case of 3C 295.


Abstract (from CDS):

Inverse Compton (IC) scattering of nuclear photons with relativistic electrons in the lobes of powerful radio galaxies and quasars can give detectable extended X-ray emission from the radio lobes if relativistic electrons with a Lorentz factor γ<300 are present (Brunetti et al., 1997A&A...325..898B). In general these electrons are not detected since they emit synchrotron radiation at frequencies below the radio band, so that the study of this effect provides a unique tool to measure the energy distribution of the electron population in the radio lobes at γ<1000 energies. In this paper we reanalyze the Chandra observation of the powerful and compact radio galaxy 3C 295 for which the IC scattering of nuclear photons is expected to be an important mechanism. We find strong evidence for extended and asymmetrical X-ray emission associated with the radio lobes in the energy band 0.1-2keV. We show that both the luminosity and morphology of the extended X-ray emission associated with the radio lobes, not compatible with other X-ray mechanisms, can be best interpreted by the IC scattering with nuclear photons. We also show that the relativistic electron energy distribution obtained from the synchrotron radio emission can be extrapolated down to γ∼100 thus providing a first direct evidence on the electron spectrum in the lobes down to lower energies.

Abstract Copyright:

Journal keyword(s): radiation mechanisms: non-thermal - galaxies: active - galaxies: individual: 3C 295 - magnetic fields - radio continuum: galaxies - X-rays: galaxies

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2766 2
2 3C 219 Sy1 09 21 08.6258123424 +45 38 57.358202856   19.56 18.69     ~ 406 2
3 3C 295 Sy2 14 11 20.6 +52 12 09   22.34 20.80 18.54   ~ 968 5

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