New tests of the cluster entropy floor hypothesis

I. G. McCarthy, A. Babul, M. L. Balogh, Gilbert Holder

Research output: Contribution to journalArticlepeer-review

Abstract

Recent efforts to account for the observed LX - TX relation of galaxy clusters has led to suggestions that the ICM has an apparent "entropy oor" at the level of K0 ≳ 300 keV cm2. Here, we propose new tests based on the thermal SZ effect and on the Mgas - TX trend (from X-ray data) to probe the level of the excess entropy in the ICM. We show that these new tests lend further support to the case for a high entropy oor in massive clusters.

Original languageEnglish (US)
Pages (from-to)315-316
Number of pages2
JournalRevista Mexicana de Astronomia y Astrofisica: Serie de Conferencias
Volume17
StatePublished - 2003
Externally publishedYes

Keywords

  • Cosmology: theory
  • Galaxies: clusters
  • X-rays: galaxies

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

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