Concept information
Preferred term
cooling flow
Definition(s)
- A cooling flow occurs according to the theory that the intracluster medium (ICM) in the centres of galaxy clusters should be rapidly cooling at the rate of tens to thousands of solar masses per year. This should happen as the ICM (a plasma) is quickly losing its energy by the emission of X-rays. The X-ray brightness of the ICM is proportional to the square of its density, which rises steeply towards the centres of many clusters. Also the temperature falls to typically a third or a half of the temperature in the outskirts of the cluster. The typical [predicted] timescale for the ICM to cool is relatively short, less than a billion years. As material in the centre of the cluster cools out, the pressure of the overlying ICM should cause more material to flow inwards (the cooling flow). (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Cooling_flow)
Broader concept(s)
In other languages
-
French
-
courant de refroidissement
-
flot de refroidissement
URI
http://data.loterre.fr/ark:/67375/MDL-PHBB3VTV-H
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