Energy dissipation and feedback in RL AGN, with an emphasis on observations
Abstract
There is considerable evidence that SMBHs, through feedback of energy from powerful radio-loud active galactic nuclei (RL AGN), interact with and influence their host galaxies and clusters and likely play an important role in regulating their growth. This regulation occurs in a feedback loop, such that increased cooling leads to increased energy output from the AGN. The Chandra X-ray Observatory has revealed the direct evidence of the AGN feedback, the X-ray cavities in the hot atmospheres of many nearby giant ellipticals, groups and clusters, allowing us to systematically quantify the bulk of the heat injected by the AGN. However, many details of this feedback cycle are still poorly understood, but powerful tools, such as LOFAR and the SKA, have recently emerged or will soon do so, making this a pivotal time in AGN studies. To illustrate this point, I will present new LOFAR observations at 120-168 MHz for X-ray cavity systems and show how they are a valuable tool with which to study feedback. Lastly, I will summarize some of the feeding processes and the advances that present and future telescopes (e.g.; ALMA, JWST, ESO ground facilities) will make possible.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1425B