SIMBAD references

2016MNRAS.456..512C - Mon. Not. R. Astron. Soc., 456, 512-517 (2016/February-2)

Discovery of a suspected giant radio galaxy with the KAT-7 array.

COLAFRANCESCO S., MHLAHLO N., JARRETT T., OOZEER N. and MARCHEGIANI P.

Abstract (from CDS):

We detect a new suspected giant radio galaxy (GRG) discovered by KAT-7. The GRG core is identified with the Wide-field Infrared Survey Explorer source J013313.50-130330.5, an extragalactic source based on its infrared colours and consistent with a misaligned active galactic nuclei-type spectrum at z ~ 0.3. The multi-ν spectral energy distribution (SED) of the object associated with the GRG core shows a synchrotron peak at ν ~ 1014 Hz consistent with the SED of a radio galaxy blazar-like core. The angular size of the lobes are ∼ 4arcmin for the NW lobe and ∼ 1.2arcmin for the SE lobe, corresponding to projected linear distances of ∼ 1078 kpc and ∼ 324 kpc, respectively. The best-fitting parameters for the SED of the GRG core and the value of jet boosting parameter δ = 2, indicate that the GRG jet has maximum inclination θ ~ 30 deg with respect to the line of sight, a value obtained for δ = Γ, while the minimum value of θ is not constrained due to the degeneracy existing with the value of Lorentz factor Γ. Given the photometric redshift z ~ 0.3, this GRG shows a core luminosity of P1.4GHz ~ 5.52x1024 W/ Hz, and a luminosity P1.4GHz ~ 1.29x1025 W/ Hz for the NW lobe and P1.4GHz ~ 0.46x1025 W/ Hz for the SE lobe, consistent with the typical GRG luminosities. The radio lobes show a fractional linear polarization ~9 percent consistent with typical values found in other GRG lobes.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): galaxies: active - galaxies: clusters: general

Simbad objects: 14

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