AGN feedback through multiple jet cycles in the Seyfert galaxy NGC 2639

The Seyfert galaxy NGC 2639 was known to exhibit three episodes of active galactic nuclei (AGN) jet/lobe activity. We present here the upgraded Giant Metrewave Radio Telescope (uGMRT) 735 MHz image of NGC 2639 showing a fourth episode as witnessed by the discovery of similar to 9 kpc radio lobes misaligned with the previously known similar to 1.5 kpc, similar to 360 pc, and similar to 3 pc jet features detected through the Karl G. Jansky Very Large Array (VLA) and the Very Long Baseline Array (VLBA), respectively. Using the spectral ageing software BRATS , we derive the ages of the similar to 9 kpc, similar to 1.5 kpc, and similar to 360 pc episodes to be, respectively, 34(-6)(+4), 11.8(-1.4)(+1.7), and 2.8(-0.5)(+0.7) Myr, and conclude that minor mergers occurred 9 -22 Myr apart. NGC 2639 shows a deficit of molecular gas in its central similar to 6 kpc region. The GALEX NUV image also shows a deficiency of recent star formation in the same region, while the star formation rate surface density in NGC 2639 is lower by a factor of 5 -18 compared to the global Schmidt law of star-forming galaxies. This makes NGC 2639 a rare case of a Seyfert galaxy showing episodic jet activity and possible signatures of jet-driven AGN feedback.