Multi-frequency study of large size radio galaxies 3C 35 and 3C 284

TL;DR

This study presents multi-frequency radio observations of large galaxies 3C 35 and 3C 284, analyzing their morphology, spectral ageing, jet power, and activity history using various models across a broad frequency range.

Contribution

It provides detailed spectral ageing maps using multiple models and assesses jet activity, offering new insights into the evolution of large radio galaxies.

Findings

Spectral ageing maps constructed with multiple models.

No evidence of episodic jet activity in 3C 35 and 3C 284.

Calculated jet power and lobe speeds for both galaxies.

Abstract

We report multi-frequency observations of large radio galaxies 3C 35 and 3C 284. The low-frequency observations were done with Giant Metrewave Radio Telescope starting from $\sim150$ MHz, and the high-frequency observations were done with the Very Large Array. We have studied the radio morphology of these two sources at different frequencies. We present the spectral ageing map using two of the most widely used models, the Kardashev-Pacholczyk and Jaffe-Perola models. Another more realistic and complex Tribble model is also used. We also calculate the jet-power and the speed of the radio lobes of these galaxies. We check whether any episodic jet activity is present in these galaxies and found no sign of such activity.