AMiBA: Sunyaev-zel'dovich effect-derived properties and scaling relations of massive galaxy clusters

Yu Wei Liao*, Jiun Huei Proty Wu, Paul T P Ho, Chih Wei Locutus Huang, Patrick M. Koch, Kai Yang Lin, Guo Chin Liu, Sandor M. Molnar, Hiroaki Nishioka, Keiichi Umetsu, Fu Cheng Wang, Pablo Altamirano, Mark Birkinshaw, Chia Hao Chang, Shu Hao Chang, Su Wei Chang, Ming Tang Chen, Tzihong Chiueh, Chih Chiang Han, Yau De HuangYuh Jing Hwang, Homin Jiang, Michael Kesteven, Derek Y. Kubo, Chao Te Li, Pierre Martin-Cocher, Peter Oshiro, Philippe Raffin, Tashun Wei, Warwick Wilson

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

7 Citations (Scopus)


The Sunyaev-Zel'dovich Effect (SZE) has been observed toward six massive galaxy clusters, at redshifts 0.091 ≤ z ≤ 0.322 in the 86-102 GHz band with the Y. T. Lee Array for Microwave Background Anisotropy (AMiBA). We modify an iterative method, based on the isothermal β models, to derive the electron temperature T e, total mass M t, gas mass M g, and integrated Compton Y within r 2500, from the AMiBA SZE data. Non-isothermal universal temperature profile (UTP) β models are also considered in this paper. These results are in good agreement with those deduced from other observations. We also investigate the embedded scaling relations, due to the assumptions that have been made in the method we adopted, between these purely SZE-deduced T e, M t, M g, and Y. Our results suggest that cluster properties may be measurable with SZE observations alone. However, the assumptions built into the pure-SZE method bias the results of scaling relation estimations and need further study.

Original languageEnglish
Pages (from-to)584-591
Number of pages8
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 1 Jan 2010


  • Cosmic background radiation
  • Cosmology: observations
  • Galaxies: clusters: general


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