Contamination of the central Sunyaev-Zel'dovich decrements in amiba galaxy cluster observations

Guo Chin Liu*, Mark Birkinshaw, Jiun Huei Proty Wu, Paul T.P. Ho, Chih Wei Locutus Huang, Yu Wei Liao, Kai Yang Lin, Sandor M. Molnar, Hiroaki Nishioka, Patrick M. Koch, Keiichi Umetsu, Fu Cheng Wang, Pablo Altamirano, Chia Hao Chang, Shu Hao Chang, Su Wei Chang, Ming Tang Chen, Chih Chiang Han, Yau De Huang, Yuh Jing HwangHomin Jiang, Michael Kesteven, Derek 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

5 Citations (Scopus)


We investigate the contamination of the Sunyaev-Zel'dovich (SZ) effect for six galaxy clusters, A1689, A1995, A2142, A2163, A2261, and A2390, observed by the Y. T. Lee Array for Microwave Background Anisotropy in 2007. With the range of baselines used, we find that the largest effect (of order 13%-50% of the central SZ flux density) comes from primary anisotropies in the cosmic microwave background and exceeds the thermal noise in all six cases. Contamination from discrete radio sources is estimated to be at a level of 3%-60% of the central SZ flux density. We use the statistics of these contaminating sources to estimate and correct the errors in the measured SZ effects of these clusters.

Original languageEnglish
Pages (from-to)608-613
Number of pages6
JournalAstrophysical Journal
Issue number1
Publication statusPublished - 1 Sep 2010


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

Fingerprint Dive into the research topics of 'Contamination of the central Sunyaev-Zel'dovich decrements in amiba galaxy cluster observations'. Together they form a unique fingerprint.

Cite this