The entropy-driven X-ray evolution of galaxy clusters | Zendy

R. G. Bower | Zendy

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The entropy-driven X-ray evolution of galaxy clusters

Author(s) -

R. G. Bower

Publication year - 1997

Publication title -

monthly notices of the royal astronomical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.058

H-Index - 383

eISSN - 1365-8711

pISSN - 0035-8711

DOI - 10.1093/mnras/288.2.355

Subject(s) - physics , intracluster medium , astrophysics , galaxy cluster , brightest cluster galaxy , galaxy formation and evolution , entropy (arrow of time) , cluster (spacecraft) , galaxy groups and clusters , galaxy , statistical physics , thermodynamics , computer science , programming language

Observations of the evolution of the galaxy cluster X-ray luminosity functionsuggest that the entropy of the intra-cluster medium plays a significant rolein determining the development of cluster X-ray properties. I present atheoretical framework in which the evolution of the entropy of the centralintra-cluster gas is explicitly taken into account. The aim of this work is todevelop a theoretical context within which steadily improving measurements ofthe X-ray luminosities and temperatures of distant galaxy clusters can beinterpreted. I discuss the possible range of entropy evolution parameters andrelate these to the physical processes heating and cooling the intra-clustermedium. The practical application of this work is demonstrated by combiningcurrently available evolutionary constraints on the X-ray luminosity functionand the luminosity--temperature correlation to determine the best-fitting modelparameters.Comment: 9 pages Tex including 4 postscript figures. To be appear in MNRAS. minor miss-quote correcte

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