New spectral index maps of 3C 449 show a flat spectrum in the inner jets that steepens outward, yielding radiative ages of ~150 Myr at the lobe edges and implying supersonic average expansion speeds if those ages represent the full dynamical lifetime.
The spectral evolution inferred with both KP’s and Tribble’s model is com- parable to that inferred from JP’s model within 1σ(see Sect
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
fields
astro-ph.HE 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
citing papers explorer
-
Mapping the emission and spectral properties of the FRI radio galaxy 3C 449 with LOFAR and the VLA
New spectral index maps of 3C 449 show a flat spectrum in the inner jets that steepens outward, yielding radiative ages of ~150 Myr at the lobe edges and implying supersonic average expansion speeds if those ages represent the full dynamical lifetime.