Circulation Flows: Cooling Flows with Bubble Return

@article{Mathews2003CirculationFC,
  title={Circulation Flows: Cooling Flows with Bubble Return},
  author={William G Mathews and Fabrizio Brighenti and David A. Buote and Aaron D. Lewis},
  journal={The Astrophysical Journal},
  year={2003},
  volume={596},
  pages={159 - 169}
}
The failure of the XMM-Newton and Chandra X-ray telescopes to detect cooling gas in elliptical galaxies and clusters of galaxies has led many to adopt the position that the gas is not cooling at all and that heating by an active nucleus in the central E or cD galaxy is sufficient to offset radiative cooling. In this paper we explore an idealized limiting example of this point of view in which hot, buoyant bubbles formed near the center return the inflowing, radiatively cooling gas to distant… 

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References

SHOWING 1-10 OF 31 REFERENCES

Hot bubbles from active galactic nuclei as a heat source in cooling-flow clusters

TLDR
Highly resolved hydrodynamic simulations show that buoyant bubbles increase the cooling time in the inner regions of clusters and significantly reduce the deposition of cold gas.

Heated Cooling Flows

In conventional models of galactic and cluster cooling flows widespread cooling (mass dropout) is assumed to avoid accumulation of unacceptably large central masses. This assumption is often

Bubbles, feedback and the intracluster medium: three-dimensional hydrodynamic simulations

We use a three-dimensional hydrodynamical code to simulate the effect of energy injection on cooling flows in the intracluster medium. Specifically, we compare a simulation of a 1015-M⊙ cluster with

Heating, Conduction, and Minimum Temperatures in Cooling Flows

There is mounting observational evidence from Chandra for strong interaction between keV gas and active galactic nuclei (AGNs) in cooling flows. It is now widely accepted that the temperatures of

Cooling flows as a calorimeter of active galactic nucleus mechanical power

ABSTRA C T The assumption that radiative cooling of gas in the centres of galaxy clusters is approximately balanced by energy input from a central supermassive black hole implies that the observed

Evolution of Buoyant Bubbles in M87

The morphology of the X-ray- and radio-emitting features in the central ~50 kpc region around the galaxy M87 strongly suggests that buoyant bubbles of cosmic rays (inflated by an earlier nuclear

The new emerging model for the structure of cooling cores in clusters of galaxies

New X-ray observations with XMM-Newton show a lack of spectral evidence for large amounts of cooling and condensing gas in the centers of galaxy clusters believed to harbour strong cooling flows.

Simulation of radio plasma in clusters of galaxies

We present three-dimensional hydrodynamical simulations of buoyant gas in a typical cluster environment. In these simulations, hot matter was injected continuously into a small region offset from the

Feedback Heating in Cluster and Galactic Cooling Flows

Cluster cooling flow models that include both active galactic nuclei (AGN) heating and thermal conduction can reduce the overall mass cooling rate and simultaneously sustain density and temperature

The thermal imprint of galaxy formation on X-ray clusters

It is widely believed that structure in the Universe evolves hierarchically—fluctuations in the primordial distribution of matter, amplified by gravity, collapse and merge to form progressively