Cold and Warm Gas Outflows in Radio AGN
arXiv:1001.2389 · doi:10.1017/S1743921310006952
Abstract
The study of the conditions and the kinematics of the gas in the central region of AGN provides important information on the relevance of feedback effects connected to the nuclear activity. Quantifying these effects is key for constraining galaxy evolution models. Here we present a short summary of our recent efforts to study the occurrence and the impact of gas outflows in radio-loud AGN that are in their first phase of their evolution. Clear evidence for AGN-induced outflows have been found for the majority of these young radio sources. The outflows are detected both in (warm) ionized as well in (cold) atomic neutral gas and they are likely to be driven (at least in most of the cases) by the interaction between the expanding jet and the medium. The mass outflow rates of the cold gas (HI) appear to be systematically higher than those of the ionized gas. The former reach up to ~50 Msun/yr, and are in the same range as "mild" starburst-driven superwinds in ULIRGs, whilst the latter are currently estimated to be a few solar masses per year. However, the kinetic powers associated with these gaseous outflow are a relatively small fraction (a few x 10^-4) of the Eddington luminosity of the galaxy. Thus, they do not appear to match the requirements of the galaxy evolution feedback models.
Invited talk, to appear in the Proceedings of the IAU Symposium 267, "Co-Evolution of Central Black Holes and Galaxies", B.M. Peterson, R.S. Somerville, T. Storchi-Bergmann, eds., in press
References in corpus (17)
- Heating Hot Atmospheres with Active Galactic Nuclei
- Science with ASKAP - the Australian Square Kilometre Array Pathfinder
- Extreme gas kinematics in the z=2.2 powerful radio galaxy MRC1138-262: Evidence for efficient AGN feedback in the early Universe?
- Fast outflows in compact radio sources: evidence for AGN-induced feedback in the early stages of radio source evolution
- Interactions of a Light Hypersonic Jet with a Non-Uniform Interstellar Medium
- High-energy particle acceleration at the radio-lobe shock of Centaurus A
- The co-evolution of the obscured quasar PKS1549-79 and its host galaxy: evidence for a high accretion rate and warm outflow
- IC5063: AGN driven outflow of warm and cold gas
- MeerKAT Key Project Science, Specifications, and Proposals
- The properties of the young stellar populations in powerful radio galaxies at low and intermediate redshifts
- Emission line gas ionisation in young radio galaxies
- Extended X-ray emission in radio galaxies: the peculiar case of 3C 305
- PKS2250-41: a case study for triggering
- Shock heating in the group atmosphere of the radio galaxy B2 0838+32A
- Physics and fate of jet related emission line regions
- The Square Kilometre Array
- Giant outflows in z~2 radio galaxies: The smoking gun of AGN feedback in the early universe