Problems in suppressing cooling flows in clusters of galaxies by global heat conduction

Details Problems in suppressing cooling flows in clusters of galaxies by global heat conduction Problems in suppressing cooling flows in clusters of galaxies by global heat conduction

2003-02-19

arxiv.org/abs/astro-ph/0302381v1

Mon.Not.Roy.Astron.Soc.342:463,2003

Astronomy and Astrophysics

Astrophysics

MNRAS, in press

Scientific paper

10.1046/j.1365-8711.2003.06548.x

I use a simple analytical model to show that simple heat conduction models cannot significantly suppress cluster cooling flows. I build a static medium where heat conduction globally balances radiative cooling, and then perturb it. I show that a perturbation extending over a large fraction of the cooling flow region will grow to the non-linear regime within a Hubble time. Such perturbations are reasonable in clusters which frequently experience mergers and/or AGN activity. This result strengthens previous findings which show that a steady solution does not exist for a constant heat conduction coefficient.

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