Abstract

We report the jet width profile of of the nearby ( $\sim 30\mathrm{Mpc}$ ) AGN NGC 4261 for both the approaching jet and the counter jet at radial distances ranging from $\sim {10}^3$ – ${10}^9$ Schwarzschild radius ( $R_{\mathrm{S}}$ ) from the central engine. Our Very Large Array (VLA) and Very Long Baseline Array (VLBA) observations reveal that the jets maintain a conical structure on both sides over the range ${10}^3$ – ${10}^9{R}_{\mathrm{S}}$ without any structural transition (i.e., parabolic to conical) like in the approaching jet in M87. Thus, NGC 4261 will provide a unique opportunity to examine the conical jet hypothesis in blazars, while it may require some additional consideration on the acceleration and collimation process in AGN jets. View Full-Text