NGC 4869: New insights from upgraded GMRT and Chandra
Abstract
Role of radio galaxies in the universe has been on upswing in recent years. Their colossal energy output over huge volumes is now widely believed to play a key role not only in the formation of galaxies and their super-massive black-holes, but also in the evolution of clusters of galaxies and, possibly, the cosmic web itself. Groups and clusters commonly contain radio galaxies, which eject large amounts of energy into their external environments. Here, I will present results for the unusual head-tail radio galaxy NGC 4869 in the Coma cluster of galaxies using upgraded GMRT showing twist, wrap, overlap and bend of radio jets. I would also present the interaction of the radio tail of the radio source with the surrounding hot gas as mapped using Chandra. More specifically, I would report (i) a steep spectrum sheath layer enveloping a flat spectrum spine, hinting at a transverse velocity structure with a fast-moving spine surrounded by a slow-moving sheath layer and (ii) the flaring of a straight, collimated radio jet as it crosses a surface brightness edge due to Kelvin-Helmholtz instabilities.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1427L